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City Council Committees - Public Works/Planning - 11/18/2013 (3)
I Public Works Committee Agenda 40 A. Councilmembers: Dana Ralph+Dennis Higgins+Elizabeth Albertson, Chair �� KENT WASHINGTON November 18, 2013 4:00 p.m. Item Description Action Speaker Time Page 1. Approval of Minutes Dated November 04, 2013 YES None 03 03 2. Information Only/Sound Transit - Update NO Cathal Ridge 15 09 3. 2014 Water Treatment Chemical Supplies/Contracts YES Sean Bauer 05 a. ICI Jones Chemicals Inc. 11 b. Cascade Columbia Distribution 13 4. Contract with GEI/Briscoe-Desimone Levee Reach 1 YES Mark Howlett 05 15 5. Kent Regional Trail Connector/Consultant Agreements YES Mark Madfai 05 a. ESA-Environmental Engineering Svcs 33 b. GeoEngineers, Inc.-Geotechnical Svcs 41 c. Shearer Design-Structural Eng. Design Svcs 47 6. Green River Natural Resources Area Pump Station/ YES Mark Madfai 05 Consultant Agreements a. Pace Engineering - Design Svcs 55 b. Historical Research Associates - Archeological Svcs 65 c. Geo Engineers, Inc. - Geotechnical Eng. Svcs 73 7. County Road 8 Levee/Consultant Agreements YES Kelly Casteel 05 a. Northwest Hydraulic - Hydraulic Analysis 79 b. GeoEngineers, Inc. - Engineering Svcs 83 8. Information Only/King County Flood Control District NO Mike Mactutis 10 88 Authorization - Russell Road Levee Unless otherwise noted, the Public Works Committee meets at 4:00 p.m. on the 1"& 3rd Mondays of each month. Council Chambers East, Kent City Hall, 220 4th Avenue South, Kent, 98032-5895. For information please contact Public Works Administration (253) 856-5500. Any person requiring a disability accommodation should contact the City Clerk's Office at (253) 856-5725 in advance. For TDD relay service call the Washington Telecommunications Relay Service at 1-800-833-6388. z This page intentionally left blank. 3 Public Works Committee Minutes November .4, 2013 COMMITTEE MEMBERS PRESENT: Committee Chair Elizabeth Albertson and Committee members Dana Ralph and Dennis Higgins were present. The meeting was called to order at 4:06 p.m. Item 1 — Approval of Meetinq Minutes Dated Monday, October 21, 2013: Committee member Higgins MOVED to approve the minutes of October 21, 2013. The motion was SECONDED by Committee member Ralph and PASSED 3-0. Item 2 — Washington State Department of Ecology Coordinated Prevention Grant: Conservation Specialist, Gina Hungerford noted that this is a two year grant funded by the Washington State Department of Ecology. The Coordinated Prevention Grant (CPG) funds Residential and Commercial Waste Reduction and Recycling Programs including events for collection of materials that are hard-to-recycle at the curb. Hungerford note that the grant also pays for event staffing, printing and mailing costs. 75% of the eligible cost is covered by the grant with the remaining 25% covered by King County Waste Reduction and Recycling Grant. Committee member Ralph MOVED to recommend Council authorize the Mayor to accept the Coordinated Prevention Grant in the amount of $213,063 for 2013/15, and establish a budget accordingly, subject to final terms and conditions acceptable to the City Attorney and Public Works Director. The motion was SECONDED by Committee member Higgins and PASSED 3-0. Item 3 — Withdrawal of Membership in South King County Regional Water Association• Interim Water Superintendent, Kevin Swinford noted that South King County Regional Water Association was formed more than 30 years ago with membership consisting of cities and water districts serving the public water supply needs for much of King County south of Seattle. The association was established to explore additional water sources to meet growing demand in the 80s and 90s and to establish service boundaries. Regional water supply demands have since changed, resulting in increased availability. In Kent this has been primarily because of the final approval of the Habitat Conservation Plan for Clark Springs and our participation with the Tacoma Second Supply Project. The original goals and objectives of the association have been met and the necessity for Kent's participation is no longer needed. A number of adjacent jurisdictions have dropped out, including the City of Auburn this past summer. The City will continue to collaborate with neighboring purveyors on supply and 4 Public Works Committee Minutes November .4, 2013 demand needs and will remain engaged with tracking legislative and other common issues that affect our water resources. Committee member Higgins MOVED to recommend Council authorize the Mayor to end City participation in the South King County Regional Water Association effective December 31, 2013. The motion was SECONDED by Committee member Ralph and PASSED 3-0. Item 4 - Clean Water Act Municipal Stormwater Permit Regional Stormwater Monitoring Program: Todd Hunsdorfer, Conservation Coordinator -NPDES noted that the Regional Stormwater Monitoring Program (RSWMP) is a required component of the 2013 - 2018 Phase II Municipal Stormwater permit. The RSWMP includes the following elements: 1. Status and Trends Monitoring - establish a base line 2. Effectiveness Studies Monitoring - best management practices 3. Source Identification and Diagnostic Monitoring - gathering information on pollution and knowing how to deal with them. Kent can accomplish elements 1 and 2 above by either buying into the RSWMP funding pool or by conducting a city-wide monitoring program consistent with the RSWMP Guidelines outlined in section S8 of the Phase II Municipal Stormwater permit. Hunsdorfer noted that the buy in option (RSWMP funding pool), at an annual cost of $77,402 per year for four years starting August 15, 2014, has been determined by city staff to be the most economical option. Analysis of costs associated with conducting a city-wide monitoring program in-house have been determined to be in the range of $350,000- $450,000 annually; including equipment, lab, and staff expenses. Utilizing consultants for portions of the program result in costs at the upper end of the estimated annual range. Phase 2 communities have four equal payments of $77,000. Hunsdorfer said the city may get money back if the city can measure the best management practice portion. Council member Ralph MOVED to authorize the Mayor to sign a letter of intent to commit $77,402 per year for four years starting August 15, 2014 to participate in the Washington State Department of Ecology Regional Stormwater Monitoring program as required by the 2013 - 2018 Phase II Municipal Stormwater Permit. The motion was SECONDED by Committee member Higgins and passed 3-0. Item 5 - Snow and Ice Preparation: Public Works Director, Tim LaPorte reminded the committee of the snow and ice storm we had three years ago. LaPorte then introduced Street Superintendent, Bill Thomas. Thomas noted that the City of Kent has a published snow and ice removal plan that is maintained on our website (listed below). In addition, our maintained anti-icing routes are also shown on 5 Public Works Committee Minutes November .4, 2013 the website. Thomas stated that the city has over 725 lane miles of roads to maintain and only 8 dump trucks that can be outfitted with plows. It has always been a priority to maintain the hilly arterials first as noted on the map. Staff is not proposing any changes to the work or prioritization of the routes that will be kept open. King County recently announced that due to severe budget cuts they would not be plowing a number of streets that they have traditionally kept open. Informally, King County staff has asked if Kent would be willing to take over clearing streets such as, East Valley Highway between the Green River and Auburn Way North. Due to our already limited resources and budget Thomas stated we do not recommend doing so at this time. Thomas stated that because of the departure from past practice by King County we recommend entering into a contractual agreement with King County for the Green River bridge maintenance at East Valley Highway and enter into an agreement with King County or a private contractor to plow Kent Kangley Road in the Clark Springs watershed during severe snow storms. For more information on snow and ice removal plans go to htto://www.kentwa.aov/content.asox?id=11016&terms=snow%20and%20ice Committee member Higgins MOVED to recommend Council authorize staff to begin negotiations with King County or a private contractor to remove snow from Kent Kangley Highway in the Clark Springs watershed and to authorize staff to begin negotiations with King County for maintenance of the Green River Bridge on East Valley Road and to bring such agreements back to the Public Works Committee for approval. The motion was SECONDED by Committee member Ralph and passed 3-0. Item 6 7 — Information Only — Briscoe-Desimone Levee Consultant Contract for Constructability Review: Design Engineering Supervisor, Ken Langholz gave an informative PowerPoint presentation. He noted that the Public Works Department has completed design of Reaches 2 and 3 for the Briscoe/Desimone Levee Project. This project includes the installation of over 3,100 feet of steel sheet pile walls, excavation of the existing levee and installation of plantings. The project is ready to go to bid which will allow it to be underway at the best time of the construction season in 2014. Langholz noted that due to the complexity of this project staff is pursuing services of outside experts in the field of sheet pile installation to perform a constructability review of the project. 6 Public Works Committee Minutes November .4, 2013 We expect the consultant services agreements to be within the approval authority of the Public Works Director or Mayor. Should any of the contracts exceed this amount, they will be brought before this committee on November 18, 2013 for consideration. Information Only/No Motion Required Item -7 6 — Information Only/Vancouver Washington Ouiet Zones Local Improvement District (LID): Design Engineering Manager, Mark Howlett noted that the City is researching alternatives for funding our proposed railroad quiet zone. State Law was changed in 2009 to allow the use of a Local Improvement District (LID) to fund a quiet zone. The City of Vancouver Washington is the only known City to form an LID for this purpose. Howlett stated that Vancouver WA set up a 3 Tier Zone system to assess special benefit, these tiers are based on the level of noise reduction. Higgins said he would be reaching out to the community to get their input to the idea of an LID for Quiet Zones. Many questions would need to be answered before we could implement this type of system. Kent's geography would be much more difficult to assess. It was discussed that a survey should be done at some point to get feedback from those that would benefit from having a quiet zone. No Motion Required/Information Only Added Item: LID 363 — SE 2241h Street Committee member Higgins noted that since our last Public Works Committee meeting he has had several meetings with Interim Chief Administrative Officer, Tom Brubaker on the subject and has a clearer idea of what the objective was at our last meeting. He asked Brubaker to explain further. Brubaker stated that he finds this LID hard to support because we don't have $10 million to complete the project. He stated that we are getting ready to go out for a bond to fund a portion of this $29 million project, of which $10 million is unfunded. There was discussion on how to come up with the shortfall, by diverting B&O money, Transportation Improvement Funds (TIF) and then paying each off over a longer period of time. It was noted that if we didn't have the LID in place we would not have received the $5 million in funds from the Transportation Improvement Board (TIB). It was noted that the $10 million is and obligation not a debt. 7 Public Works Committee Minutes November .4, 2013 Committee Chair Albertson stated that giving away all the money we have cobbled together is not a good idea. If we don't do the project we lose the $5 million TIB money and forsake other projects moving forward. Information Only/No Motion Required The meeting was adjourned at 5:24 p.m. Cheryl Viseth Council Committee Recorder 8 This page intentionally left blank. 9 PUBLIC WORKS DEPARTMENT Timothy J LaPorte P.E., Public Works Director Phone: 253-856-5500 KEN T Fax: 253-856-6500 WASH IN GTO N Address: 220 Fourth Avenue S. Kent, WA 98032-5895 Date: November 12, 2013 To: Chair Elizabeth Albertson and Public Works Committee Members PW Committee Meeting Date: November 18, 2013 From: Cathy Mooney, Senior Transportation Planner Through: Timothy J. LaPorte, P.E., Public Works Director Subject: Sound Transit Update on Link Light Rail Extension to Kent Item — 2 No Motion Required/Information Only Summary: This is a quarterly update to keep Council apprised of developments in this project. Light Rail is anticipated to operate continuously between Seattle and Tacoma. The project has funding, through a vote of the public called ST-2, as far as Highline Community College on the border of Kent and Des Moines by 2023. The project is also considering the next segment (to Federal Way Transit Center) in conceptual design and environmental review phases. At the July 2, 2013 Council Workshop, Sound Transit presented the results of the Alternatives Analysis process for the Federal Way Link Extension Project. The results were also made available for public and agency review during an EIS Scoping comment period which concluded on July 7, 2013. Based on input received during the Scoping Period and the Alternatives Analysis, the Sound Transit Board identified the alternatives to be studied in detail in the Draft EIS. Sound Transit will briefly recap the Alternatives Analysis results and provide an overview of the Scoping comments and the Draft EIS alternatives. Budget Impact: None 10 This page intentionally left blank. 11 PUBLIC WORKS DEPARTMENT Timothy J. LaPorte P.E., Public Works Director Phone: 253-856-5500 KEN T Fax: 253-856-6500 WASH IN GTO N Address: 220 Fourth Avenue S. Kent, WA 98032-5895 Date: October 29, 2013 To: Chair Elizabeth Albertson and Public Works Committee Members PW Committee Meeting Date: November 18, 2013 From: Sean M. Bauer, Interim Water Superintendent Through: Dave Brock, P.E., Interim Operations Manager Subject: 2014 Water Treatment Chemical Contract with JCI Jones Chemicals, Inc. Item - 3a Motion: Move to recommend council authorize the Mayor to sign an Agreement with JCI Jones Chemicals, Inc. for water treatment chemicals, in an amount not to exceed $91,000.00, subject to final terms and conditions acceptable to the City Attorney and Public Works Director. Summary: The City annually advertises for water treatment supply chemicals to ensure a consistent cost for annual budget planning. The use of these chemicals is required to produce drinking water quality that meets state and federal regulations. JCI Jones Chemicals provided the lowest bid for gas chlorine and sodium hydroxide. Gas chlorine is used to disinfect the water supply and protect it from contamination, and sodium hydroxide is used as a pH adjustment for corrosion control. Budget Impact: There is no Unbudgeted Fiscal Impact as this is an annual cost which is planned for each year and the funding ($91,000.00) would come from the 2014 Water Utility operating budget. 12 This page intentionally left blank. 13 PUBLIC WORKS DEPARTMENT Timothy J LaPorte P.E., Public Works Director Phone: 253-856-5500 KEN T Fax: 253-856-6500 WASH IN GTO N Address: 220 Fourth Avenue S. Kent, WA 98032-5895 Date: October 28, 2013 To: Chair Elizabeth Albertson and Public Works Committee Members PW Committee Meeting Date: November 18, 2013 From: Sean Bauer, Water Quality Supervisor Through: Dave Brock, P.E., Interim Operations Manager Subject: 2014 Water Treatment Chemical Contract with Cascade Columbia Distribution Item - 3b Motion: Move to recommend Council authorize the Mayor to sign an Agreement with Cascade Columbia Distribution for water treatment chemicals in an amount not to exceed $30,900.00, subject to final terms and conditions acceptable to the City Attorney and Public Works Director. Summary: The City annually advertises for water treatment supply chemicals to ensure a consistent cost for annual budget planning. The use of these chemicals is required to produce drinking water quality that meets state and federal regulations. Cascade Columbia Distribution provided the lowest bid for sodium fluoride and potassium permanganate. Sodium fluoride is used to fluoridate the drinking water in an effort to help prevent dental cavities in young children, and potassium permanganate is used in the removal of iron and manganese to prevent staining of fixtures (sinks, tubs, etc). Budget Impact: There is no Unbudgeted Fiscal Impact as this is an annual cost which is planned for each year and the funding ($30,900.00) would come from the 2014 Water Utility operating budget. 14 This page intentionally left blank. 15 PUBLIC WORKS DEPARTMENT Timothy J. LaPorte P.E., Public Works Director Phone: 253-856-5500 KEN T Fax: 253-856-6500 WASH IN GTO N Address: 220 Fourth Avenue S. Kent, WA 98032-5895 Date: October 25, 2013 To: Chair Elizabeth Albertson and Public Works Committee Members Special PW Committee Meeting Date: November 18, 2013 From: Ken Langholz, Design Engineering Supervisor Through: Chad Bieren, P.E., City Engineer Subject: Consultant Services Contract with GEI Consultants, Inc. for Briscoe-Desimone Levee Reach 1 Item — 4 Motion: Move to recommend Council authorize the Mayor to sign a Consultant Services Contract with GEI Consultants, Inc. in an amount not to exceed $399,124 to provide engineering services for the Briscoe- Desimone Levee Reach 1 project, subject to final terms and conditions acceptable to the City Attorney and Public Works Director. Summary: The Briscoe-Desimone Levee is located along the Green River between S. 180th St. and S. 200th St. Reach 1 of this levee is located within the city limits of Tukwila and provides flood protection for the Cities of Kent, Tukwila and Renton. In 2011, the City, in conjunction with the King County Flood Control District (KCFCD), was successful in obtaining a $7 million grant from the Washington State Legislature to fund reconstruction of the Briscoe-Desimone Levee. And, in June 2013 the City entered into an Interlocal Agreement with the KCFCD which allocated an additional $11 million of District funds and assigned responsibility for design and construction of the project to the City of Kent. The City is continuing to pursue accreditation of the Briscoe-Desimone Levee from the Federal Emergency Management Agency (FEMA). As part of this accreditation effort, the City prepared a Conditional Letter of Map Revision (CLOMR) which identified 4 areas, or reaches, of the levee that do not meet current FEMA standards. These areas will be repaired utilizing sheet piles to construct a secondary floodwall. Under this consultant services agreement, GEI will provide additional geotechnical evaluations, structural analysis, and prepare plans and specifications for Reach 1. The contract will only be executed after the Interlocal Agreement with the City of Tukwila is executed. Budget Impact: This contract will be funded out of the $18 million which was allocated to the Briscoe-Desimone Levee project through an Interlocal Agreement with the KCFCD. 16 This page intentionally left blank. 17 October 24, 2013 E I conauhams Mr. Ken Langholz City of Kent Public Works Department 220 Fourth Avenue South Kent, WA 98032 Re: Proposal for Engineering Services Briscoe-Desimone Levee Setback Floodwall Design, Reach 1 City of Kent,Washington Dear Mr. Langholz: We are pleased to submit this proposal to provide engineering services for Reach 1 of the Briscoe-Desimone Setback Floodwall Design Project on the right bank Green River levee. The Briscoe-Desimone levee extends between the South 180t' Street bridge (downstream end at River Mile 14.3) and the South 200 rh Street bridge (upstream end at River Mile 17.0). Our proposed scope of work is based on our conversations and correspondence with you in August and September 2013. The proposed scope and budget for Reach 1 are described below. The proposed scope and budget also includes additional design effort require to complete the design for Reaches 2, 3, and 4 under our existing contract. PROJECT UNDERSTANDING The City of Kent(City)has initiated an engineering evaluation and certification process for the levees along the right bank of the Green River, with the overall objective of obtaining Federal Emergency Management Agency (FEMA) accreditation of the levee in its Flood Insurance Rate Maps (FIRMS)for the area. The City has divided the levees along the right bank into six levee reaches, and accreditation packages have already been prepared and submitted to FEMA. The Briscoe-Desimone Levee has a length of approximately 2.7 miles, of which about 1.2 miles are within the City of Tukwila and 1.5 miles are within the City of Kent. The levee has never been accredited by FEMA. The levee protects land uses mainly consisting of large-scale industrial and commercial properties. A FEMA accreditation package for the Briscoe-Desimone Levee was prepared by GeoEngineers Inc. of Tacoma, WA. Because of the high asset value and critical nature of the facilities protected by this levee,the City retained GEI to prepare an independent evaluation and stand-alone FEMA Accreditation report. Both GeoEngineers and GEI identified four reaches of the levee that should be modified to meet the minimum freeboard requirement and stability factor of safety under rapid drawdown w .geiconsultants.com GEI Consultants,Inc. 180 Grand Avenue,Suite 1410,Oakland,California 94612 510.350.2900 fax 510.350.2901 18 Mr. Ken Langholz October 24, 2013 conditions. The reaches are identified as follows: • Reach 1 (Sta. 764+25 to Sta. 772+50) • Reach 2 (Sta. 815+50 to Sta. 822+00) • Reach 3 (Sta. 844+00 to Sta. 864+00) • Reach 4 (Sta. 895+00 to Sta. 897+00) Both reports recommended that levee modifications for these reaches involve installing a setback sheet pile wall along the landward toe of the existing levee. The space between the sheet pile wall and the existing embankment would be filled, and the Green River pedestrian and bike trail would be relocated on top of the fill. This approach does not address instability along the existing riverbank. Rather, it is designed to hold back the flood even after a considerable amount of soil is lost riverward of the wall due to sloughing. After significant sloughs, the riverbank would still need to be repaired to prevent future additional sloughing and instability. This approach is consistent with regional objectives of minimizing environmental impacts on the Green River and maintaining the pedestrian and bike trail as a key recreational amenity and access route. In March 2013, the City of Kent awarded a contract to GEI to design setback sheet pile floodwalls for Reaches 2, 3, and 4. At the time of this proposal, GEI and their subconsultant Shearer Design had completed design of a setback sheet pile floodwall for Reach 3 and performed preliminary design of a sheet pile setback wall for Reach 2. During the design of the Reach 2 and 3 floodwalls,the design concept for Reach 4 was changed to a setback cantilevered concrete floodwall, and at the time of this proposal, GEI and Shearer Design were designing a concrete floodwall and vehicle access ramp for Reach 4. As part of the FEMA accreditation effort described above, the City and GEI prepared a 35% design of the setback sheet pile wall for Reach 1, and the 35% design drawings were included with the accreditation report prepared by GEL Based on our conversations with City staff, we understand the following: • Reach 1 is located entirely within the City of Tukwila, and the City of Kent is negotiating an interlocal agreement between the cities. • The final alignment of the floodwall has not been finalized, but will be established as part of the interlocal agreement between Kent and Tukwila. We understand that the floodwall is expected to be setback at least 10 feet farther from the river than shown in the 35% design. • For the levee accreditation report, an approximately 1,000-foot-long reach of the West Valley Highway embankment was considered to be part of the levee. West Valley Highway is a state highway. It is our understanding that FEMA will not accept the highway embankment as part of the levee system unless the City of Kent and Washington Department of Transportation (WashDOT) reach an agreement that the 2 19 Mr. Ken Langholz October 24, 2013 subject reach of highway embankment will be maintained as a levee. We understand that the City is working on a franchise agreement with WashDOT, but at the time of this proposal, an agreement has not been concluded. Based on our conversations with the City, we understand that the Reach 1 design will be prepared assuming that the subject reach of West Valley Highway embankment will act as a levee, and the design will include a transition from the setback sheet pile floodwall to the highway embankment possibly consisting of a short extension of the sheet pile wall into the highway embankment. SCOPE OF WORK Based on our understanding of the project objectives, we have structured the proposed scope of work into the following tasks: 1. Site Visit and Kickoff Meeting 2. Review of Existing Information 3. Supplemental Subsurface Explorations 4. Geotechnical Evaluations 5. Corrosion Evaluation 6. Floodwall Structural Analyses 7. Floodwall-Levee Transition Zones 8. Ramps and Stairways Design 9. Design Memorandum 10. Floodwall Drawings 11. Specifications 12. Project Management and Coordination The task scope, deliverables, and major assumptions are summarized below. 1. Site Visit and Kickoff Meeting—We propose to perform a one-day site visit to observe the existing conditions along the proposed floodwall alignment and to attend a project kickoff meeting with the City. The purpose of our site visit and meeting with the City includes the following activities: • Identify buildings or other structures that may be impacted by sheet pile installation vibrations. • Identify overhead utilities or other structures along the proposed sheet pile alignment that could interfere with sheet pile installation or other aspects of floodwall construction. • Identify vegetation and landscaping features that could complicate floodwall installation or other construction activities. • Review proposed vehicle access ramp location to identify potential design or construction constraints. 3 20 Mr. Ken Langholz October 24, 2013 • Review planned locations for transition zones between levee and highway embankments and floodwall sections to identify possible design or construction constraints. • Review and identify locations and site access for additional subsurface explorations. • Meet with the City to discuss our observations, gather data from the City relevant to the project and identify additional information that may be required to complete the design. During the kickoff meeting we also intend to: • Re-introduce key project personnel and re-establish connections between GEI and City personnel. • Review the scope in detail and confirm or refine the overall project schedule and deliverable expectations. Deliverable: Meeting minutes. 2. Review of Existing Information—Based on the results of our site visit, additional information may be required to develop the floodwall design and construction documents, such as as-built drawings for nearby buildings, utilities, and other structures or information from adjacent commercial building owners regarding equipment or processes that may be sensitive to construction vibrations or noise. As a cost saving measure, we assume that GEI will provide a list of the required information to the City and that the City will collect the information and provide it to GEI for review. We have not included scope or budget for collecting additional information or contacting building owners. We understand that the buildings along the floodwall alignment are likely to be founded on structural mat foundations and not on individual spread footings or pile foundations. Based on our previous site visits, we understand that the buildings along the alignment are in relatively good condition. We have prepared our scope and budget assuming that structural assessment of individual buildings is not required. If our site visit or review of information for individual buildings indicates that building foundation types or conditions are significantly different than anticipated, we will prepare a scope and budget for further building evaluations if required. Deliverable: List of documents reviewed and relevant findings to be included in the Design Memorandum prepared under Task 9 below. 3. Supplemental Subsurface Explorations—We will perform a supplemental subsurface exploration program to refine the characterization of the levee and foundation materials and groundwater conditions to aid in the engineering evaluations. In the preparation of our scope, we have assumed that the City will facilitate the work by performing the following activities: • Facilitate timely entry to all areas of the project for site visit and exploration purposes. Our current scope does not include establishing right-of-entry agreements or other right- of-way services. • Obtain City and/or County permits (if any are needed)for explorations. • Obtain all necessary environmental clearances (if any are needed)for the proposed exploration sites and activities. 4 21 Mr. Ken Langholz October 24, 2013 Soil Borings USACE Engineering Circular(EC) 1110-2-6066,Design ofI-Walls prescribes a number of closely spaced borings with an extensive laboratory testing program to provide a high level of confidence in the geotechnical parameters for design and constructability of I-walls. To date, the borings performed along the levee alignment were performed for the purposes of evaluating the existing levee embankment for accreditation. For typical sheet pile design projects, the data collected from these borings may be considered suitable for design, but the sampling and laboratory testing performed for accreditation do not meet the minimum requirements established by USACE specifically for I-wall design. Given the prescribed boring depths and the extensive laboratory testing requirements in the EC, the borings performed to date would be used primarily for defining the soil stratigraphy, and additional borings are required to collect the minimum data required specifically for I-wall design. The spacing and depth requirements are provided in Table 5-1 (Chapter 5) of the EC. To satisfy the boring spacing requirements in Table 5-1, we propose a maximum spacing between the new borings of 500 feet or less, and we propose locating the new borings so that the average spacing between all borings, including the previously drilled borings, is about 300 feet or less. As result, we propose drilling three borings to satisfy the spacing requirements. This task will begin with the preparation of a Field Exploration Work Plan which will outline exploration locations, depths, types of samples, methods for geotechnical test borings, and laboratory index testing of collected soil samples. A draft work plan will be issued to the City for review. Review comments will be incorporated into a final work plan. We assume we will drill up to three conventional borings at depths up to 70 feet to supplement the existing information. We have assumed that drill cuttings can be dispersed over the ground next to the drill hole and raked in with the surficial soil. Off-site disposal of cuttings is not included. We will transport soil samples to a laboratory for testing on selected samples. We anticipate that one of our test borings will be on or adjacent to West Valley Highway. Additional coordination with WSDOT may be required to obtain permission to perform the boring. Also, the work may require additional traffic control and or a lane closure. We assume the City will provide coordination and permits with WSDOT and the City of Tukwila as necessary to perform the boring. Our subcontract driller will provide traffic control. The number, depths, and technique for the borings may change based on observations made during our site visit and in the course of the drilling program. Laboratory Testing and In-situ Testing Table 5-2 of the EC includes mandatory requirements for soil strength, consolidation, permeability, and index testing. Our proposed program will comply with the laboratory testing requirements in the EC except for the requirement for laboratory permeability testing of granular soils. In our opinion, in-situ permeability testing using borehole permeability testing is more appropriate for determining the soil permeability for design in the variable alluvial deposits that exist along the floodwall alignment. Laboratory permeability testing only represents the permeability of the discrete sample collected and may not be representative of the soil layer being considered for design. In-situ testing of granular materials is supported by 5 zz Mr. Ken Langholz October 24, 2013 the text in Chapter 5 of the EC. The EC acknowledges that"because of the difficulty in obtaining undisturbed samples of coarse-grained soils"permeability is difficult to accurately determine in the laboratory and states "in situ tests such as pump tests or lag tests can give more accurate estimates of the permeability of granular soils." The number and type of required laboratory tests to be performed varies depending on the type and thickness of soil layers encountered in each boring. For budgeting purposes, we assumed the following laboratory tests will be performed on samples collected from each boring: • Two consolidated undrained (CU)triaxial tests • Two unconsolidated undrained(UU)triaxial tests. • Four specific gravity tests. • Four Atterberg limits. • Two consolidation tests. • Four sieve analyses. In addition, we assumed that the laboratory permeability tests would be replaced with two borehole permeability tests or slug tests per boring. Geotechnical Data Report Addendum Upon completion of the subsurface explorations and laboratory testing, we will prepare a memorandum summarizing the data collected during the subsurface investigation program. The memorandum will be prepared as an addendum to the Geotechnical Data Report previously prepared by GEI in support of the levee accreditation. Information in this memorandum will include: • Updated geotechnical exploration location plans and profiles, • New boring logs • Field testing results, and • Laboratory testing results. Deliverables: Field Exploration Work Plan Geotechnical Data Report Addendum 4. Geotechnical Evaluations— We will perform the following geotechnical evaluations: • Global stability, seepage, and settlement analyses on up to two cross sections at the proposed floodwall location. • Global stability and settlement analyses on one cross section for a vehicle access ramp to be constructed landward of the floodwall. Our evaluation will include the use of tiebacks or deadman and anchors if necessary to provide additional lateral support to the proposed wall. • Sheet pile embedment analyses using soil-structure interaction models on up to three cross sections to refine the sheet pile embedment depths from the 35% design. The sheet pile analyses will be performed using the commercial software program 6 23 Mr. Ken Langholz October 24, 2013 WALLAP by GeoSolve. The analyses will be used to estimate the required sheet pile embedment and stiffness for stability. • Floodwall deflections at the cross-sections evaluated to estimate the required embedment. • Pile drivability evaluation using published correlations with SPT N-values to determine the minimum stiffness needed for sheet pile installation. In addition we will contact a sheet pile contractor to assess the sheet pile drivability. We will prepare documentation that will explain our methodology, document selection of geotechnical parameters, document calculations performed, and summarize the results of our evaluations. Deliverable: The documentation for this task will be part of the overall Design Memorandum prepared under Task 9. 5. Corrosivity Evaluation—Based on conversations with the City, observations of soil conditions in the borings performed for FEMA Accreditation, and corrosivity evaluation performed for Reaches 2 and 3, we understand the soils and groundwater at the site are not likely to be highly corrosive. However, we understand the City of Kent is looking for a minimum design life of 75 years but prefers a design life of 100 years. We propose to retain a corrosion expert to perform tests on soils samples collected during our drilling program, estimate corrosion rates, and provide corrosion protection design recommendations for the floodwall structure to achieve the minimum design life. We anticipate corrosivity testing will consist of: • Resistivity (ASTM G 57) • pH (ASTM G 51) • Sulfates (ASTM D 516) • Chlorides (ASTM D 512) Based on our corrosion evaluation at Reaches 2 and 3, we anticipate that corrosion protection for the sheet piles will likely consist of sacrificial steel added to the sheet pile cross section. Prior to final design, we will provide our corrosion protection recommendations to the City for review and approval. Deliverables: Corrosion Evaluation and Recommendations Memorandum 6. Floodwall Structural Analvses—We propose to perform structural analysis and design for the following structural floodwall elements: • Sheet Pile: We will confirm or refine the overall floodwall dimensions (beginning and end stations, and bottom and top elevations). We will estimate the sheet pile size required to resist the estimated loads from our geotechnical analyses, and if required, we will select and evaluate appropriate corner and transition pieces. • Sheet Pile Cap Beam: We understand that the cap beam detail used for Reaches 2 and 3 will be used for Reach 1. We will evaluate the Reach 2/3 cap beam design 7 24 Mr. Ken Langholz October 24, 2013 for the estimated loading from our Reach 1 geotechnical analyses to confirm that the cap beam has adequate reinforcing to resist the Reach 1 loading. If required, we will add reinforcing to the Reach 2/3 cap beam design for use in Reach 1. • Sheet Pile Wall Concrete Facing: We understand that the concrete facing detail used for Reaches 2 and 3 will be used for Reach 1. We will evaluate the Reach 2/3 facing design for the estimated loading from our Reach 1 geotechnical analyses to confirm that the facing has adequate reinforcing to resist the Reach 1 loading. If required, we will add reinforcing to the Reach 2/3 facing design for use in Reach 1. • Railings: We understand that the railing design for Reaches 2 and 3 will be reused for Reach 1, and no additional evaluation of the railing is included in our proposal. • Water Stops and Construction Joints: We understand that the water stop and construction joint details used for Reaches 2 and 3 will be used for Reach 1. We will provide locations for water stops and construction joints as required in the sheet pile cap and the wall facing. Deliverable: The results of the structural evaluations will be documented in the Design Memorandum prepared under Task 9 below. 7. Sheet Pile Wall—Levee Embankment Transition Zones—We assume that the sheet piles at the downstream end of Reach 1 terminate within the highway embankment and the highway embankment is protected from erosion by the highway paving. We will evaluate erosion potential at the transition area between the setback floodwall and the upstream levee embankment section assuming the levee embankment is overtopped, and we will design erosion protection for the levee embankment as required. We assume that erosion protection will consist of either buried riprap or vegetated articulated concrete blocks. Prior to final design, we will provide our recommended erosion protection option to the City for review and approval. Deliverable: The results of the transition zone evaluations will be documented in the Design Memorandum prepared under Task 9 below. 8. Ramps and Stairway Design—We understand that the City plans to construct a vehicle access ramp near West Valley Highway near the current vehicle access point and one pedestrian stairway near Sta. 769+20. We understand the top of the vehicle access ramp will be at the 100-year flood elevation plus 3 feet similar to the vehicle access ramp designed for Reach 3. As such, we anticipate that little or no grade change will be required to construct the access ramp, but a closure structure will be required at the ramp to raise the level of protection to the 500-year plus 3 foot level. We prepared our proposal assuming that at the access ramp the sheet pile floodwall will need to be tied back using ground anchors, similar to the ramp design for Reach 3, and we have included the costs for designing an anchor system in our proposal. We have assumed that the vehicle access ramp will require a closure structure similar to the closure structure designed for Reach 3, and we have included costs for the design of the closure structure in our proposal. 8 25 Mr. Ken Langholz October 24, 2013 We assume that the pedestrian stairway will be constructed with reinforced concrete and will not significantly load the floodwall. We assume that pedestrian stairway will be design similar the stairway designed for Reach 3. For our proposal we have assumed that the City will prepare the geometric design and drawings for the access ramp, with GEI and our subconsultant Shearer Design providing structural details for the ramp, closure structure, and stairway. The scope and budget from Shearer Design are attached. Deliverable: The access ramp, closure structure and stairway design will be documented in the Design Memorandum prepared under Task 9 below. 9. Design Memorandum—We will prepare a design memorandum providing a brief overview of the floodwall design and documenting our design criteria, assumptions and decisions. The design memorandum will be initially issued with the 60% design submittal to present the floodwall design criteria(water surface elevations, scour assumptions, loading cases, methods of analysis and required safety factors, soil profiles and engineering properties for analysis, etc.). Our design calculations will be included as attachments to the 90% design submittal. Comments will be incorporated into our Issued-for-Approval submission. Deliverables: 60% Design Memorandum; 90% Design Memorandum; Issued-for-Approval Design Memorandum. 10. Floodwall Drawings —Similar to Reaches 2, 3, and 4, we understand that the City will use its design and CAD resources to develop layouts, profiles and cross-sections and perform a portion of the drafting. We propose that GEI prepare drawings showing design details and that the City prepares title sheets, note sheets, plan and elevation drawings, geometric arrangement drawings, and other drawings as required. GEI will work with the City to provide input to the City's drawings. We propose that drawings prepared by GEI include: • Sheet Piling- Typical Sections & Details • Concrete Cap - Typical Sections & Details • Concrete Facing- Typical Sections & Details • Joint& Waterstop Details • Tiebacks and Wales —Typical Sections and Details, and Other Structural Steel Details for Setback Floodwall • Closure Structure Details • Transition Erosion Protection - Typical Sections & Details A portion of the project will be constructed adjacent to West Valley Highway. This will limit available work areas and require additional planning, sequencing and coordination. We will assist the City's coordination efforts by evaluating the potential construction techniques and sequencing as necessary. Deliverable: 60% Design Drawings; 90% Design Drawings; Issued-for-Approval Design Drawings. 9 26 Mr. Ken Langholz October 24, 2013 11. Specifications—We understand that the City intends to base the project specifications on the Washington State Department of Transportation (WSDOT) Standard Specifications for Road, Bridge, and Municipal Construction. We anticipate that the Special Provisions will be similar to the Special Provisions prepared for Reaches 2 and 3. We propose to review the Special Provisions for Reaches 2 and 3 and propose modifications related to the floodwall, ramp, and closure structure construction and to building protection if needed for Reach 1. We will review Special Provisions related to: • Preconstruction and post-construction building surveys • Steel sheet piling • Pile driving equipment • Construction induced vibrations and monitoring • Building settlement monitoring • Structural concrete and concrete for wall facing • Structural steel • Closure structure construction We will also provide input to other Special Provisions prepared by the City as necessary. Deliverable: Proposed modifications to 90% and Issued-for-Approval Special Provisions. 12. Reach 3 and 4 Design Modifications—This task encompasses scope modifications undertaken under the City's direction on our existing contract for Reaches 2, 3, and 4 that could not be completely accommodated under the approved budget authorization. Changes in scope from our original contract include: • Reach 3 Design Modifications. The Reach 3 design evolved from providing a simple ADA access ramp at the parking lot access point to providing a larger parking lot and vehicle access ramp. Design changes included designing a reinforced concrete wall, deadman and wall anchorage system to support the increased loading, and flood closure structure. The design was further refined in August 2013 to provide an additional closure wall associated with the trailhead modifications required by the City's parks department. • Reach 4 Design Modifications. Our original contract assumed Reach 4 would be constructed by using a sheet pile wall similar to those designed for Reaches 2 and 3. As the project progressed the design has evolved to include two independent reinforced concrete retaining walls and flood closure structure which require additional design and details. • Extended project duration. Our original contract assumed Reach 3 would be finalized in July 2013 with Reaches 2 and 4 being finalized in September 2013. The project duration has been extended for several months due to extended negotiations with the county, permitting, and right-of-way considerations. Reaches 2 and 3 are anticipated to be bid in November. Bid date for Reach 4 has not yet been finalized. The extended duration has entailed additional rounds of review and revisions to the design drawings and increased project management effort. 10 27 Mr. Ken Langholz October 24, 2013 13. Proiect Management and Coordination -Project management and coordination are essential to ensure the successful preparation of the Reach 1 floodwall design. Successful implementation will require effective oral and written communications and coordination. The project management task will include the following activities: • Coordination of project activities with City staff • Management and supervision of the engineering team • Management, coordination, and evaluation of subconsultant services • Project progress and coordination meetings • Documentation of key meetings • Meetings and reviews with King County if appropriate • Preparation of monthly summaries of current financial information and schedule We expect that several meetings will be required during design development to discuss and address City and County comments on design. We have budgeted two face-to-face meetings after the initial kick off meeting, and we have budgeted weekly conference calls. Management of Quality Control (QC) activities will also be included in this task, including the review, coordination and checking of work products at each step of their development. Work products include the key deliverables and support documentation, such as work plans, technical memoranda, drawings, and special provisions. Our QC team will review technical approaches and verify that deliverables and supporting documents prepared for the City are complete, conform to standards, and meet or exceed the expectations of the City and GEI's management. The project manager will be responsible for the assurance that our QC procedures are being implemented. Deliverables: Monthly progress reports ASSUMPTIONS We made the following assumptions in preparing the scope and cost estimate: 1. Design Submittals - We assume that design of the floodwall will include three design submittals which will include: • 60% Design • 90% Design • Issue for Approval We assume that the City and King County will review the drawings, specifications, and design memorandum developed at each phase of design. As a result of these reviews, we assume that one round of comments will be provided to us from the City and from the County at each phase of design, and we will provide formal responses as required to address these comments. 2. Topographic Information to be provided by the City - For preparation of the design, accurate topographic information will be necessary for the existing levee and adjacent land surfaces (river bank and land east of the levee). We understand that survey data will be 11 2s Mr. Ken Langholz October 24, 2013 provided to us by the City. Accordingly, our scope does not include mapping and survey services. We anticipate the following information will be used in the design and will be provided by the City in a timely manner: • Topographic map with 1-foot contours of the Green River channel, levee and ground surface in the area behind the levee. • Representative cross-sections showing river channel (including below water bathymetry), river bank, levee, and land surface landside of the levee to a distance of at least 100 feet beyond the landside levee toe. • Selected additional cross-sections as needed to identify critical (steepest) slopes of river bank and levee. • Surveyed levee crest elevations at a spacing of 100 feet or closer. • As-drilled locations of all subsurface explorations completed by GEI. 3. Hydrologic and Hydraulic (H&H) Information to Be Provided by the City - Preparation of the design will require confirmation or updating of information on water surface profiles, velocities, scour depths, and appropriate bank protection for the floodwall reaches: • Green River water surface profiles for final design (to include 100-year, 500- year, and mean water profiles). • General, local, and bend scour evaluation -thalweg profiles and cross-sections over time including recent bathymetric data, stability of thalweg location and channel shape, calculation of estimated bend scour depths at approach and exit sections, and scour recommendations. • Distribution of water velocities along the right bank for use in design. We assume the City will work with NHC to assemble available data and provide it to us. Our scope does not include H&H services. We assume our review will be limited to documents provided to us by the City. 4. Right of Way Support - In the preparation of our scope, we have assumed that the City will facilitate the field work and our evaluation of adjacent structures by performing the following activities: • Facilitating timely entry to all areas of the project for site visit and exploration purposes. Our current scope does not include right-of-way services. • Obtaining City and/or County permits for explorations. • Obtaining all necessary environmental clearances (if any are needed)for the proposed exploration sites and activities. • Coordinating with owners of adjacent structures and obtaining as-built drawings and other building and foundation information needed for the design. S. Existing Buildings and Improvements - We assume that the City will collect any required information such as drawings, details, documentation of existing buildings and improvements for our review. We assume that structural assessment of individual buildings is not required. 6. Interior Drainage - We have assumed that installation of the floodwalls will not significantly impact the interior drainage conditions landward of the levee. Our scope and budget do not include interior drainage evaluations. 12 29 Mr. Ken Langholz October 24, 2013 7. Corrosion Potential - We have assumed that the soil and groundwater conditions at the locations of the proposed floodwalls are not aggressively corrosive. A nominal evaluation of these conditions is proposed. 8. Ramp - We have assumed that the City will prepare the geometric design, drawings and basic special provisions for the access ramp, with GEI providing foundation recommendations, structural details, and special provisions as required. 9. For cost estimating purposes, the project schedule assumes a duration of approximately eight months for this project. COST ESTIMATE We will perform the above scope of services on a time and materials basis based on the terms of our current agreement with the City of Kent for the Briscoe-Desimone levee. Based on the information known to us, we estimate that the cost of performing the services outlined above will be approximately $399,124. A breakdown of the estimated costs is included in the attached table. Invoices will be submitted monthly based on the services performed as of the end of each billing period. Payment will be due within 45 days per the terms of the City of Kent agreement as negotiated by the City of Kent and GEI Consultants. This estimate does not include any contingency. We understand that additional budget to address changes and unforeseen complications that require additional effort would be added by contract modification subject to our presentation of written justification. SCHEDULE We are prepared to begin work upon receiving a Notice to Proceed(NTP). Based on the approach outlined above and assuming a NTP in early January 2014, we anticipate completing the scope described above within the following schedule: Task Anticipated Schedule, Reach 1 Project Kickoff Meeting and Site Visit January 2014 Subsurface Explorations February - March Engineering Evaluations March - Aril 60% Design Submission April 90% Design Submission June Issued-for-Approval Submission August Project Management January - August Note: Design submissions assume a 30-day review period by the City, Flood Control District, and other review agencies. We appreciate the opportunity to submit this proposal and look forward to working with you on this project. Please call me at 510-350-2908 or Jim Nickerson at 781-721-4023 with questions. 13 30 Mr. Ken Langholz October 24, 2013 Sincerely, GEI CONSULTANTS, INC. P&gr Alberto Pujol, P.E. Vice President, Project Manager Attachments: Cost Estimate Shearer Design Letter of Scope 14 � ) }} o : /\\ //\\\ \ \\\{ \\// \/\\ R= �= w.a, -o—o ae : »s«y /\ / //\\\/\ \\\) /\/\j /\/ � ) } mm s a a \ \ o /\ > \ \� \ m 33 PUBLIC WORKS DEPARTMENT Timothy J LaPorte P.E., Public Works Director Phone: 253-856-5500 KEN T Fax: 253-856-6500 Wnsu INGTON Address: 220 Fourth Avenue S. Kent, WA 98032-5895 Date: October 21, 2013 To: Chair Elizabeth Albertson and Public Works Committee Members PW Committee Meeting Date: November 4, 2013 From: Mark Madfai, P.E., Design Engineering Supervisor Through: Chad Bieren, P.E., City Engineer Subject: Consultant Services Agreement with ESA Consultants for Environmental Engineering Services for the Kent Regional Trail Connector Item - 5a Motion: Move to recommend Council authorize the Mayor to sign an Agreement with ESA in an amount not to exceed $30,847.00, to provide environmental engineering services for the Kent Regional Trails Connector Project subject to final terms and conditions acceptable to the City Attorney and Public Works Director. Summary: The Public Works Department competed for and was successful in obtaining a $1,125,368 federal grant for the Kent Regional Trails Connector project. This project will construct a new east-west multi-use trail connecting the existing Green River Trail to the Interurban Trail. The trail location will be adjacent to the Green River Natural Resources Area and will include the installation of rectangular rapid flashing beacons at 64th Avenue and 72nd Avenue and a new "HAWK" signal at the crossing of West Valley Highway. A new non-motorized bridge will be constructed across Mill Creek on the east end connecting to the Interurban Trail. This project will require the services of an environmental engineering consultant to identify and locate wetlands and their associated buffers. Additional services include archaeological investigation and preparation of a biological assessment. Budget Impact: Funding for this work will be provided by a federal grant from Federal Highway Administration (FHWA) for $1,125,368.00. The City's funding match will be $176,635.00. 34 This page intentionally left blank. 35 City of Kent Kent Regional Trail Connector Project SA Scope of Work At the City's request,ESA has prepared this Scope of Work and Cost Estimate to conduct wetland delineations and cultural resource surveys in support of the Kent Regional Trail Connector Project.The City of Kent is proposing to construct 4,700 lineal feet of paved non-motorized use trail to links the Puget Power Trail with the Interurban Regional Trail system.The Kent Regional Trail Connector will involve construction of an asphalt trail parallel to 64th Avenue South and South 218th Street,a pedesb ian/bicycle bridge,and three new signals/beacons.The trail would then head east within City owned property that includes an existing storm water diversion ditch from Mill Creek,including a new bridge crossing of Mill Creek, The City of Kent wetland mapping shows wetlands within the stormwater diversion ditch andshoreline associated wetlands within the Green River Natural Resource Area(GRNRA).Delineation of wetland boundaries within the project area would be required by City of Kent Municipal Code.It is our understanding the project would receive FHWA funding,which will make it a Federal undertaking subject to compliance with Section 106 of the National Historic Preservation Act("Section 106). FHWA is the lead Federal agency; responsibility for compliance with Section 106 has been delegated to WSDOT. This scope of work does not include assistance with federal,state,or local permits.If permit assistance is requested,ESA would provide a cost estimate for the additional services.The proposed crossing of Mill Crock would require at a minimum Hydraulic Project Approval(HPA)from the Washington Department of Fish and Wildlife.The City of Kent may require that trails constructed withinthe shoreline management area of the GRNRA be reviewed for consistency with the SMP.Based on discussions with City staff it is not anticipated that wetlands or steams will be filled for this project.Impacts to wetlands and/or streams may require 404 permit approval from the Corps of Engineers and 401 permit approval from the Washington Department of Ecology. TASK 1—PROJECT MANAGE MEN . This task includes on-going project management,client coordination,and invoicing. We assume that ESA will be attending one on-site project coordination meeting conducted concurrently with the field visit(see Task 2). Deliverables: Monthly invoice and progress report TASK 2—WETLAND DELINEATION.This task includes three subtasks: Subtask 2.1-Wetland Delineation Field Work;. BSA will delineate wetlands within the project area(the stormwater diversion ditch connecting Mill Creek with the GRNRA located on City owned parcels 122204- 9130,-9129,-9067,and-9077,and along the west side of 640i Ave S.between S.224th St.and S.218th St. Based on our understanding of the proposed project,the east-west portion of the trail would be constructed south of the stormwater ditch,therefore wetland delineation work will include the southern boundary of wetlands.The northern boundary will be approximated based on aerial photo interpretation.Wetland delineations along the west side of Oi Street will include all wetlands within 50 feet of the existing roadway. The boundaries of the large wetland areas within the GRNRA that are further from the road than 50 feet will not be delineated.The boundaries to these wetlands will be approximated using aerial photo interpretation or by relying on previous delineation if available, 36 City of Kent Bent Regional Trail Connector Page 2 of 5 Under Washington state law,a public utility locate will need to be completed prior to digging for this project: E,SA will request completion of a utility locate through the Utility Notification Center. ESA staff will also flag the ordinary high watermarks(OHWM)of streams within the project area.Wetland and stream boundaries will be marked with flagging tape or wire pin flags.Wetland areas that occur between the OHWM of stream will be considered part of the stream and not flagged.Wetland determination methods will follow the U.S.Army Corps of Engineers Wetlands Delineation Manual(Environmental Laboratory, 1987)and the Regional Supplement to the Corps of Engineers Wetland Delineation Manual:Western Mountains,Valleys, and Coast Region(U.S.Army Corps of Engineers,2008). Man-made ditches that do not convey natural waters or streams will not be marked in the field. ESA staff will also rate the wetlands based on the Washington State Department of Ecology's Wetland Rating System for Western Washington(Hruby,2004).Wetland ratings will be used to determine the required buffer based on Kent Municipal Code(KNIC). Subtask 2.2-Draft Wetladtd Rem ESA will prepare a draft wetland report describing wetlands and buffers adjacent to and within the project site.The report will include results of the wetland delineation(Task 2.1). Based on our discussions with City staff,the project will be designed to avoid wetland or stream impacts, therefore the report will not include impact calculations or mitigation planning.Buffer impacts are likely to occur on this project,but this scope does not include mitigation planning for buffer impacts.The City will provide figures showing the wetlands,streams,and buffers.ESA will incorporate the figures into the draft wetland report. 5ubtask 2.3 -Final Wetland Report,, Following receipt of comments by the City,ESA will prepare a Final Wetland Report, For the purpose of this cost estimate,we have assumed only one revision of the Wetland Report after review under Task 2.2. Additional revisions may require an amendment to the scope of work and cost proposal for this project. Deliverables. ® ESA will prepare and deliver a sketch map with the approximate locations of wetland boundary flags marked.The sketch map will be intended to aid surveyors in the location of the flagging, o ESA will delivery electronic files of the Draft and Final wetland report City for their review. d ESA will delivery two bound copies of the final Wetland Report to the City. Assumptions: ® City will obtain/provide all rights of entry to properties,as needed. '... 9 The City of Kent will arrange for apiofessional land survey of the wetland and stream boundary flagging. ® ESA will estimate the required buffer setback for wetlands and streams based on the information collected in Task 2.1. ® The City of Kent will provide electronic base maps in CAD showing the project site, wetland and stream boundaries,buffers,and adjacent roadways. ® ESA will make one round of revisions to the Draft Wetland Report based on consolidated comments from the City. ® Preparation of mitigation plans(either conceptual or designs)for wetland,stream,buffer,or shoreline management areas is not included in this scope of work,If mitigation measures are required at a later date,ESA can provide a scope and budget for those services. Schedule: Once a signed contract has been received,ESA anticipates the following project schedule: 37 i City of Kent Kent Regional Trail Connector Project Page 3 of 5 • Within 10 business days:ESA field staff wil l completed wetland delineations. ® Within 10 business days of completing wetland delineations:Submit draft Wetland Report for City review. o Within 5 business days of receiving comments from City on draft Wetland Report:Submit final Wetland Report.The City will be responsible for distributingthe final Wetland Report to the appropriate permitting agencies. TASK 3—CULTURAL.RESOURCES(Optional Task) The Cultural Resources subtasks described in this section are optional and will only be conducted following written notice to proceed from the City. Task 3.1 Client/Agency C000ination&APE Correspondence.Under this task,ESA will assist the City of Kent in coordinating with WSDOT/PIIWA as necessary.ESA will define the Area(s)of Potential Effects (APE)for Section 106 consultation;ESA will provide draft APE correspondence to be signed by the City and submitted to WSDOT.This correspondence is on the critical path,as WSDOT will subsequently send correspondence to DAHP and the affected Tribes which begins a 30 day comment period.Field work cannot be conducted until the 30 day comment period has passed. ESA will also contact the cultural resources technical staff of affected`Pribes to determine any Tribal cultural resources concerns within the project area;this technical staff to technical staff communication sloes not constitute formal consultation. Task 3.2 Background Research ESA Will conduct necessary background archival research at DAHP,the University of Washington,within its own archives,and online to identify recorded and potential archaeological and historic resources in and around the project area ESA will also review available environmental and geological background information. Task 3.3 Field Surve . ESA assumes that WSDOT will require a field survey of the APE based on the DAHP i cultural resources predictive model. The field survey will consist of pedestrian reconnaissance to document current surface conditions,and a subsurface survey along the planned corridor.Surface reconnaissance will attempt to document areas containing placed fill and/or graded material.The subsurface survey will consist of up to 72 harnd-dug shovel probes advanced to 3 feet(1 meter)at 60 foot(20 meter)interval along the corridor. All spoils will be screened through ''/a-inch mesh.Probe locations will be recorded using OPS.Prehistoric and historic artifacts(if encountered)will be described and photographed in the field,and returned to the find location;no artifacts will be collected. Under Wasbington state law,a public utility locate will need to be completed prior to subsurface survey for this project;ESA will request completion of a utility locate through file Utility Notification Center. Task 3.4 Historic Property Inventory Updgte. ESA assumes that a historic,single-family residence at located 21807 68th Avenue South will be included within a visual-effects APE for the project.ESA will update the existing DAMP Historic Properly Inventory for the residence.ESA assumes that ail necessary observations needed to update the HPI can be made frorn within the public right-of-way. Task 3.5 Technical Report,ESA will summarize the findings of our work and recommendations in a Technical Report. The Technical Report will meet the current SHPO standards for cultural resources assessment including making recommendations for mitigating or minimizing potential adverse effects,if warranted by the results of the field work.ESA will submit adraft Technical Report(pdf format)to the City for review. ESA will revise the report with any comments and provide an external draft report(pdf format)to be submitted to WSDOT for 38 City of Kent Kent Regional Trail Connector Page 4 of 5 review;WSDOT will only accept draft reports.ESA will incorporate comments and edits from WSDOT and prepare a final report. WSDOT will be responsible for distributing the technical report to DAHP and affected tribes. Deliverables: ESA will prepare a draft and final Cultural Resources Technical Report(with HPI as an appendix)that meet SHPO standards. Assumptions: • City will provide copies of any gootechnical reports or logs for review,if available. • City will provide a copy of previously submitted EZ form(s). • City will obtain/provide all rights of entry,as needed. • A utility locate must be performed prior to subsurface survey.ESA will coordinate with Utility Notification Center to schedule the utility locate.ESA assumes that marking in the field with white paint and/or stakes will be required prior to requesting the utility locate.ESA assumes that the project area can be readily accessed by the utility locators,and will not require additional on-site meetings with locators. • One set of consolidated comments on the draft Technical Report and HPI will be provided to ESA by the City. • Cost estimate assumes ESA will record update one Historic Property Inventory. Schedule: Once a Notice to Proceed has been received,FSA anticipates the following project schedule: • Within 5 business days:Provide draft APE correspondence to City;contact Tribal technical staff. • Within 15 business days:Complete Background Research. • Following WSDOT's 30 day comment period:Begin Field Survey;complete within 10 business days. • Within 10 business days of completing Field Survey:Submit draft Technical Report(with HPI as appendix)for City review, • Within 5 business days of receiving comments from City on draft Technical Report and HPI:Submit external draft Technical Report(w7th HPI as appendix)for review by WSDOT. • Within 5 business days of receiving comments on external draft Technical Report and HPI; Submit final Technical Report(with HPI as appendix)to WSDOT;WSDOT will be responsible for distributing the final Technical Report. TASK 4—BTOLOCICAL EVALUATION(Optional Task) The Biological Evaluation sub-tasks described in this section are optional and will only be conducted following written notice to proceed from the City. Subtask 4.1 Information Gathering_This task includes coordination with City and project engineers to evaluate project impacts on listed/proposed species and critical habitats.This task includes a brief review of the literature and published information for each listed,proposed,and candidate species identified by the Services as potentially occurring in the project area,as well as a review of site-specific information provided to ESA by the City.This task will include a field visit to assess site conditions,but does not include any additional data collection or scientific study.The City will make the necessary arrangements for ESA to access restricted properties,if any.Much of the required information will be obtained from a recent BE for a nearby project; South 228"Street Drainage Bypass(ESA 2011). 39 City of Kent Rent Regional Trail Connector Project '... Page 5 of 5 Suhtask 4 2-Draft Biological Eva'uation Task 4.1 includes the preparation of a draft Biological Evaluation (BE)letter of"no offect"addressing listed,proposed,and candidate species,identified by the Services as potentially occurring within the project area ESA will prepare the letter of"no effect"following USACE guidance for BE/BA preparation in effect at the time of issuance of notice to proceed.It is assumed that the level of effort for the letter of"no effect"will be substantially reduced by using the South 228"Street Drainage Bypass(ESA 2011)as a template. Subtask 4.3—Final Biological Evaluation Following receipt of continents by the City,ESA will prepare a Final BE letter of"no effect". For the purpose of this cost estimate,we have assumed only one revision of the final BE after review under Task 4.2. Additional revisions may require an amendment to the scope of work and cost proposal for this project. Deliverables. After any revisions,ESA will submit an electronic copy of the letter of"no effect"to the City in pdf format and will supply up to three bard-copies for their use,if necessary.The City will be responsible for submitting the letter of"no effect"to the Corps. Assure to ells:ESA will be pleased to revise the BE as required based upon comments received within the l ituitudons of tie budget,although it is assumed that there will be only one revision of the final BE after receipt of one set of consolidated comments from the City's review of the draft.Changes to the project or report requirements,particularly as a result of new species information or changes to listing status after work has been initiated will require added services or additional revisions and may require an amendment to the Scope of Work.This task also assumes that project related effects will result in a determination of no effect for all listed species within the project action area Schedu e:From receipt of notice to proceed and upon receipt of aminimum 30 percent"d8l3 n,ESA will require a minimum ofthree weeks to develop and submit the Draft BE letter of"no effect"to tfie CE'fy.Once comments have been received,ESA will require an additional two weeks to revise the document and submit the Final BE letter of"no effect"to the City for submittal to the federal authority. >rc_ I 40 � 4.:.l• ,;«» ` � / \ - A - ) \ 2 ! ] 9 . ; 4! R � l2Qg9 CQQ � . a,4 . \ . _ li,I . 41 PUBLIC WORKS DEPARTMENT Timothy J LaPorte P.E., Public Works Director Phone: 253-856-5500 KEN T Fax: 253-856-6500 Wnsu INGTON Address: 220 Fourth Avenue S. Kent, WA 98032-5895 Date: October 9, 2013 To: Chair Elizabeth Albertson and Public Works Committee Members PW Committee Meeting Date: November 18, 2013 From: Mark Madfai, P.E., Design Engineering Supervisor Through: Chad Bieren, P.E., City Engineer Subject: Consultant Services Agreement with GeoEngineers Inc. for Geotechnical Services for the Kent Regional Trails Connector Item - 5b Motion: Move to recommend the Council authorize the Mayor to sign an Agreement with GeoEngineers Inc. in an amount not to exceed $12,559.00, to provide geotechnical services for the Kent Regional Trails Connector Project, subject to final terms and conditions acceptable to the City Attorney and Public Works Director. Summary: The Public Works Department competed for and was successful in obtaining a $1,125,368 federal grant for the Kent Regional Trails Connector project. This project will construct a new east-west multi-use trail connecting the existing Green River Trail to the Interurban Trail. The trail location will be adjacent to the Green River Natural Resources Area and will include the installation of rectangular rapid flashing beacons at 64th Avenue and 72nd Avenue and a new "HAWK" signal at the crossing of West Valley Highway. A new non-motorized bridge will be constructed across Mill Creek on the east end connecting to the Interurban Trail. This project will require the services of a geotechnical engineer to evaluate the soil conditions for the structural design for the bridge and foundation design for the signal poles. Budget Impact: Funding for this work will be provided by a federal grant from Federal Highway Administration (FHWA) for $1,125,368.00. The City's funding match will be $176,635.00. 42 This page intentionally left blank. 43 i EXHIBIT A SCOPE OF SERVICES GEOENGINEERS, INC. KENT REGIONAL TRAIL CONNECTOR KENT,WASHINGTON FILE NO. 0410-186-00 OCTOSER 4,2013 i SCOPE OF SERVICES The purpose of our services is to conduct subsurface explorations and laboratory testing as a basis fou developing geotechnical recommendations related to the design and construction of the proposed Kent Regional Trail Connector in Kent, Washington. The project includes construction of the proposed Mill Creek Footbridge and the construction of retaining walls in sections of the trail between 64+h Avenue South and 72^d Avenue South. The footbridge bridge will be constructed over Mill Creek. The bridge is envisioned as a single-span reinforced concrete deck supported on shallow foundations. The east abutment of the bridge will be located near the Interurban Trail. The west abutment will be located in a vacant field. We understand that abutment loads will be on the order of 160 kips. A portion of the trail will be located on the south side of the Mill Creek Diversion Channel between 641h Avenue South and 724 Avenue South. Retaining walls may be required to achieve the trail grade through this area. The walls will retain small cuts, less than 3 feet, and fills that could be on the order of 5 to 7 feet tall. The fill walls may be located about mid-slope on the bank of the channel. Based on information provided by the City of Kent,the bank of the channel is about 1.0 feet high. The fill walls will likely be required in multiple discrete locations where Fish Cover Dugouts have been excavated into the south side of the channel. Our geotechnical scope of services in support of design will include the following items: 1. Review existing soil and groundwater information, including select in-house reports and published geologic maps, 2. Conduct a site visit and geologic reconnaissance of the proposed trail area between 640h Avenue South and 72nd Avenue South. We will observe surface conditions and complete shallow explorations (hand augers or surface samples) as appropriate. During this site visit we will also coordinate exploration locations,access and review site safety issues for the bridge explorations. 3. Coordinate clearance and location of existing underground utilities in the project area. We will contact the Washington Utilities Coordinating Council "One Call" service prior to beginning explorations. 4. Drill two borings to depths of 20 feet below ground surface (bgs) using hollow stem auger drilling techniques. One boring will be located at each proposed abutment location. 5. Perform laboratory analysis of select soil samples. We anticipate that our laboratory program will consist of grain-size analyses and moisture content determinations. 44 City of Kent 'October 4,2013 Page 2 I & Provide seismic design parameters in accordance with American Association of State Highway and Transportation Officials (AASHTO). We will discuss the potential for liquefaction and provide settlement estimates as appropriate. 7. Provide recommendations for shallow foundations for the proposed bridge and mechanically stabilized earth (MSE) walls. We will discuss bearing surface preparation and requirements for overexcavation of unsuitable material. We will also provide design criteria, Including allowable soil bearing pressures, settlement estimates, and allowable lateral resistance values for the design of foundations. 8. Complete a brief evaluation of the effect of shallow bridge foundations bearing near the slopes. We will provide recommendations for foundation setbacks, embedment depths, and/or reduced allowable bearing pressures,as necessary. 9. Provide recommendations for the design of MSE retaining walls. We will provide design soil parameters In accordance with Washington State Department of Transportation (WSDOT) guidance for contractor designed MSE walls. 10. Complete a limited slope stability evaluation of MSE walls to be constructed on the channel bank. Our analysis will be based on our limited explorations and our understanding of typical valley soils. We will provide recommendations for wall bearing support on or adjacent to the channel bank and recommended minimum reinforcement lengths required for global stability. 11. Provide recommendations for site earthwork. We will provide recommendations for imported fill, reuse of on-site soil,as appropriate,and fill compaction requirements. 12. Prepare a geotechnical design report presenting the results of our explorations and summarizing our findings and recommendations. 13. Provide additional consultation as required and requested. We anticipate that this could include meetings, plan review or developing additional foundation recommendations as appropriate. We have budgeted 4 hours for a senior geotechnical engineer and 6 hours for a staff engineer to cover this contingency. Our scope and budget does not include any construction management,monitoring or Inspections. We will provide a scope and budget for these services upon request. S�FIEbt1L� We are currently in a position to start our field coordination and reconnaissance within two to three days of receiving authorization to proceed. The schedule for field explorations will depend In part on subcontractor availability but can likely be scheduled within two weeks of authorization. We anticipate our report will be available three weeks after site explorations are complete. We will keep you apprised of our schedule, If design Information is required ahead of this schedule we can provide preliminary findings and recommendations to the design team as they are developed. IJS:GHSa Attachment: Fxhiblt B-1.Fee Estimate '.. Disclaimer.Any electronic foon,facsimile or hardcopy of the original document(emall,teat,table,and/orfigwe),if provided,and any attachments are only a copy of the original document,The original document Is stored by Geolinglneer s,Inc,and tvllf serve as the official document closeout, GEOENGINFER File No.0410 195 on 45 HIBIT B FEE ESTIMATE CITY OF KENT ENGINEERING DEPARTMENT GEOTECHNICAL ENGINEERING SERVICES PROPOSED MILL CREEK FOOTBRIDGE KENT,WASHINGTON FILE NO,0410466-00 Classification Hours x Rate Cost Principal(Garry Squires) 4 x $215.00 = $860.00 Senior GeoteohnicalEngilleer(Lylestone) 12 x $165.00 $1,980.00 Staff Engineer 2(Erik Ventura) 56 x $115.00 = $6,440.00 Support 7 x $85,00 = $595.00 Subtotal Personnel $9,875.00 Other Expenses Subcontracted Drilling $2,300,00 Laboratory(2 Sieve Analyses and 4 Moisture Content Determinations) $234.00 '.. Expendables(Mileage,etc.) $150.00 Subtotal $2,684.00 Total Estimated Costs $12,559.00 i Fife No.0410.196 CO october4,2013 GEOENGINEER5 46 This page intentionally left blank. 47 PUBLIC WORKS DEPARTMENT Timothy J LaPorte P.E., Public Works Director Phone: 253-856-5500 KEN T Fax: 253-856-6500 Wnsu INGTON Address: 220 Fourth Avenue S. Kent, WA 98032-5895 Date: October 9, 2013 To: Chair Elizabeth Albertson and Public Works Committee Members PW Committee Meeting Date: November 18, 2013 From: Mark Madfai, P.E., Design Engineering Supervisor Through: Chad Bieren, P.E., City Engineer Subject: Consultant Services Agreement with Shearer Design Consultants for Structural Engineering Design Services for the Kent Regional Trails Connector Item - 5c Motion: Move to recommend the Council authorize the Mayor to sign a Consultant Services Agreement with Shearer Design in an amount not to exceed $34,847.00 to provide structural engineering services for the Kent Regional Trails Connector Project, subject to final terms and conditions acceptable to the City Attorney and Public Works Director. Summary: The Public Works Department competed for and was successful in obtaining a $1,125,368 federal grant for the Kent Regional Trails Connector project. This project will construct a new east-west multi-use trail connecting the existing Green River Trail to the Interurban Trail. The trail location will be adjacent to the Green River Natural Resources Area and will include the installation of rectangular rapid flashing beacons at 64th Avenue and 72nd Avenue and a new "HAWK" signal at the crossing of West Valley Highway. A new non-motorized bridge will be constructed across Mill Creek on the east end connecting to the Interurban Trail. This project will require the services of a structural engineer to design the new bridge over the drainage ditch adjacent to the Interurban Trail. Budget Impact: Funding for this work will be provided by a federal grant from Federal Highway Administration (FHWA) for $1,125,368.00. The City's funding match will be $176,635.00. 48 This page intentionally left blank. i 49 SHEARER DESIGN LLC. DESIGN acoln Brldga Design;Construction Engineering and lnfrasfructure Aesthetics 3613 Phinney Ave N#A Seattle,WA 98103 I September26, 2013 (206)781-7830 City of Kent 400 W Gowe Kent,WA 98032 j (253) 856-5500 Subject: Interurban Trail Bridge Attn: Nick Born Dear Nick: We are happy to provide engineering services for the City of Kent's Interurban Trail Bridge. I he following scope of services details the engineering for this project. Task 1 —Structural Design General.This task shall encompass design and engineering as needed for the new pedestrian bridge over Mill Creek. Shearer Design will perform a preliminary layout task and discuss findings with the City prior to proceeding with PS&E design. During PS&E design, Shearer Design will perform the necessary engineering and drafting for the bridge to produce "30W, "90W, and "Final" plans, specifications and engineer's construction cost estimates. Bridges and structures will be designed in conformance with the following: • AASHTO LRFD Bridge Design Specifications, 6ffi Edition,with latest interim revisions o AASIiTO LRFD Guide Specifications for the Desigo of Pedestrian Bridges, 2"d Edition All CAD work will be prepared using Auto CAC)2014, 1.1 Project Management. Shearer Design will provide project management and administration necessary to perform this scope of services, including the following: 9 Provide monthly invoices Attend project meetings with the City ® Visit the project site Coordinate project activities with other project members, including City staff and other City consultants (e.g. geotechnical) 1.2 Preliminary Layout.After delivery of the project topographic survey by the City, Shearer Design will perform the following in order to determine the basic orientation of the bridge, including approximate alignment and bridge length, prior to proceeding to the 30% design phase: Review the provided survey information ® Determine layout options for the bridge alignment across Mill Creek n DISCUSS layout options with the City 1.3 30% Design.After the preferred alignment is determined by the City as a result of the Preliminary Layout task, the following items of work will be performed to bring the design to the 30% design level: • Finalize bridge layout ® Review draft geotechnical recommendations for substructure design m Develop abutment type and size s Prepare 30% level drawings showing bridge plan, elevation and typical section views Prepare a 30% level engineer's construction cost estimate.This includes calculating and compiling quantities and unit costs for the bridge bid items that correspond to the bridge plans. 1\SHEARERSERVERID•DdveWDMIN11ob Conlract%lC-0253 Interurban lraiA0253 Kent Interurban Trail Bridge Seopeslorx 50 } SHEARER DESIGN LLe. SHEARER DESION a 1 Bridge Desgn,Construction Engineering and Infrastnrcture Aes!hetics 3613 Phinney Ave N#A SeMe,WA 98103 (203 M-MO Permit Assistance—Provide drawings and quantities related to the bridge as required for environmental and'blddding permits prepared by the City Deliverables: > 30% Plans (11"x17"PDF format) ® 30% Engineer's Construction Cost Estimate(8.5"x11"PDF and Excel formats) ® Drawings and quantities for permits i 1.4 90% Bridge Plans,Specif[catsions and Estimate(PS&E).Auer the City has reviewed the 30%bridge plans and estimate,the following items of work will be performed to bring the design to the 90%design level: • Incorporate the City's'30% review comments e Review final geoteclwnical report • Superstructure design calculations • Substructure design calculations o Update bridge plan,elevation and typical section views to the 90% level and develop plan details for all necessarry bridge components to the 90% level • Update the engineer's;construction cost estimate to the 90% level. This includes updating quantities and unit prices, and adding or removing items as needed that correspond to the bridge plans and spedifications. a Prepare draft special provisions for bridge items for the City's use in developing the overall project specifications • Permit Assistance—Revise drawings and quantities as needed for environmental and building permits prepared by the City Deliverables: 90%Plans(11"x17" POF format) 90%Engineer's Conftruction Cost Estimate (8.5"x11'PDF and MS Excel formats) 6 90% Bridge Special Prtovisions (MS Word format) j Revised drawings andhquantities for permits, as required 1.5 Final Bridge Plans, Specificaitions and Estimate (PS&E).After the City has reviewed the 90% PS&E,the following items of virork will be performed to finalize the PS&E documents: ® Incorporate the City'sSO% review comments • Finalize design calculations • Finalize the bridge plsrrls • Finalize the engineer's construction cost estimate ® Finalize the special prawisions for bridge items for the City's use in developing the overall final project specifications. Deliverables: N Final Plans(11"x17"PiDF format) ° Final Engineer's ConsP,,ruction Cost Estimate (8.5°x11" PDF and MS Excel formats) Final Bridge Special Provisions (MS Word format) Task P_—Construction Services Shearer Design will provide the foli'owing services in support of the bridge construction: • Review shop drawings o Respond to contractor requests for information(RFI)as needed for questions regarding the bridge construction ® Site visit for special inspection, final walkthrough or other needs as requested by the City IiSHEARERSERVERkO-Drivc'ADM[ IJ b ^N o l,ontradslC-02531ntemban lrai60253 Kent Interurban Troll Bridge Scopa.tlocx 51 i SHEARER DESIGN LLc. SHEARER DESIGN do 1309a Design, Construction 4Fnglneering and in8astructwe Aesthetics 3613 Phinney Ave N#A I, Seattle,WA 98103 '.. (206)781-7830 Deliverables: • Reviewed Shop Drawings(PDF format) > Responses to RFI (Email) Items not inc.auded in this proposal and to be provided by the City and their other consultants: o Site topographic survey > Weiland Delineations • Geotechnical foundation report ® Utility design m Hydraulic Analysis ® Permit Application • Preparation of bid contract documents i Please see the enclosed spreadsheet for a summary of our estimated cost and hours for this project. We look forward to wonting with you again on this exciting project. If you have any questions please feel free to call Sincerely, David R. Shearer S.E. Principal SHEARER DESIGN j 6SHEARER8EkvER1n-Drive"MtNWob Contracts%C-0253 Interurban tra1110253 Kenl Interurban Trail Bridge Scope.docx 52 i f . � 6 ; / / ° § ( \ _/ � / \ ? ) ) 22 53 i . � \ � � - - - ! 9 . . . » - r \ _ \ . ' \. ^ ~ / } k0 \ , - r9 ! . g : 9/ S - © t gg\/ 3 - x � �� 2« 3g /G ` 54 \ j ! !! 4 _ \ - ^_\ : « ! g - - --- \ \\ \\ \\ \ 41 § ° - - - e ; _! � /! ! ; 55 PUBLIC WORKS DEPARTMENT Timothy J LaPorte P.E., Public Works Director Phone: 253-856-5500 KEN T Fax: 253-856-6500 WASH IN GTO N Address: 220 Fourth Avenue S. Kent, WA 98032-5895 Date: November 13, 2013 To: Chair Elizabeth Albertson and Public Works Committee Members PW Committee Meeting Date: November 18, 2013 From: Mark Madfai, P.E., Engineering Supervisor Through: Chad Bieren, P.E., City Engineer Subject: Contract/Pace Engineers Inc. - Pump Station Design Services for Green River Natural Resources Area Pump Station Item - 6a Motion: Move to recommend Council authorize the Mayor to sign an agreement with Pace Engineers Inc. in an amount not to exceed $172,855 to provide Pump Station Design services for the Green River Natural Resources Area Pump Station Project, subject to final terms and conditions acceptable to the City Attorney and Public Works Director. Summary: The Public Works Department will be constructing a pump station at the Green River Natural Resources Area (GRNRA). This project will allow the GRNRA to accommodate additional stormwater during high flow events, to help prevent flooding in downtown Kent and nearby industrial areas. This pump station will be quite large; it will be designed to pump 30 cubic feet per second (cfs), or about 225 gallons per second of water with a future capacity of 50 cfs from the ponds and into the Green River during high flows. The pump station design will also include a fish/sediment screen to keep fish and sediment out of the pump station. Pump station design is a specialty engineering service that the City does not have the expertise to perform in house. Budget Impact: This project will be paid for with the storm utility funds. There are no unbudgeted fiscal impacts. 56 This page intentionally left blank. 57 '#��,,IT H_� tau October 25,2013 Mr. Mark Madfai Design Engineering Supervisor City of Kent 400 Wcst Gowe Kent, WA 03032 Staiil Green liver Natural Resource Area Stonnwater Pump Station Scope of Work Dear Mr. Madfai; As requested, PACE Engineers has prepared this scope of work forthe Careen River Natural Resource Area sLormwater pump station.Per our meeting on September 24,2013, the general scope of work for this project would be to develop a complete set of construction plans and specifications for advertisement, Subsequent phases of this project would include construction support as deeded. PACE has prepared the following Scope, of Work. If anything in this proposal is not as you anticipated, please let us know so we can adjust it as required. Project Understanding The proposed Green River Natural Resource Area Pump Station is intended to reduce flooding in the Mill Creek drainage basin by pumping up to 50 cfs from the constructed lagoon to the Green River. it is anticipated that the pump station will consist of 3 vertical turbine pumps discharging to a new 42-inch forcemain located under the existing access road. Since the WDFW has identified the lagoon as a fish bearing body of water the pump station will need to be designed with screens that will keep fish out of the pump system. It is the City's desire to have the cleaning of these screens fully automated. The scope of work will consist: of the following items: 1. Design a 50 CFS pump station with 3 vertical turbine pumps. The pump station foundation shall be concrete, walls shall be constructed of KLA structural bricks, metal roof" with skylights over each pump, and Siernen's MCC. �. Exterior generator with shelter similar to James Street Pump Station and Foster Park projects. Design generator for 30 C S or for powe ing two of the three, pumps. 3, Forcemain design born pump station to the Green River (plan and profile) 4, Design outlet piping at Green River for submittal by City to Corps of Engineers. a. Design a screen systern that will meet both the fish harrier requirements of WDFW and the maintenance requirements of the City of Kent, The City wishes to be able to drive nn top of the screen system. 6. Design an automated screen cleaning system. 7. Design an inlet system to the,pUrnpstadon that ininimizes overall impacts to the lagoon and maintenance while providing sufficient drawdown of the lagoon. 3. Prepare site Plans to suhinit file JARPA application to the ReSOLH-cL Agencies for conct in ence 58 lic.'a, 7 Pixnr,e I, Mr. Mark Madfai City of ICent October 23, 2013 Page 2 On the proposed project. 9. Design a hammerhead turnaround. 10, Flow meter vault or hiline flow meter. 11. Discharge piping shall allow for recirculation 12. Design discharge pump manifold to be buriod and not above floor in dry well. We anticipate staitlng this work immediately and proceeding on a preliminary layout to submit to the CIty for review. The e5thriated cost fur this work is approxiniately $ 174,58100. SCOPE OF WORK 'Task I -- Project Ma nag evne.10:1 Coovd!nation/M eeti ng a PACE will provide administration and coordination of the project. The following items are included in this task: 1. Attend coordination meetings with the City as requited, For budgetary purposes 24 hours have been allotted for meetings. Since the, amount of meeting U1112 is not under our control, any time in excess of the budgeted 24 hours will be billed on a time and material basis. 2. Conduct a field reconnaissance of site and other facilities with the design team and City staff, 3. Coordination with subconSLIltants. 4, 111-11OLIse prqJectadt"ninistration, scheduling, and dhection of design team staff, 5. Preparation of monthly progress reports. Task 7— Prelioninary and Final Pump Station Design This task includes preparing preliminary and final drawings of the proposed improvements to submit to the City for review, and comment. This work includes: 1., Site layout with location Of )UITIp station, screened inlet structure, discharge piping, Steen River discharge point, hammerhead Wrraioundl, fencing, and generator, 2. Design details of new pump station, scieened inlet structure, automated screen cleaner, discharge pipe and Green River penetration. 3. Design details Of fencing, piping, fittings, valves, and recirculation line. 4, 1 IVAC equipment. S. Structural design and details of generator pad and shelter. 6, 1 ESCP sheets, T Submit 30%, 90% and 100% project documents for City staff reviews, corilloellLs and approval. Submit three sets for each review. 8, Assist City With p0l"I'li coordination with regulatory rigeii(Jes. For budget pui poses 16 hours have. hoon allotted. (City to take the lead on 111 permits.) 9. Prepare budget-level C011SURICtiOn cost estimate. i'aSk 3 — :S�Ilelfb irM f,"IFfilC HAW PACT sub-consultants Follett Engineering and Sysienns, Intei-face (ST) will prepare plans and 59 C gi!f Ptrxn ii.^.i t i vyars 'i Mr. Mari( Madfai City, of Kent October 23, 2013 Page 3 specifications associated with the electrical requirements. Follett Engineering will provide plans and specifications for site power needs. ST will provide plans and specifications for communication and controls. SI will follow rip by being the City's integrator on the project, Both sub-consultants have worked together out similar projects with PACE and with the City. We have included both Follett Fngineering and SI's proposals for your information, At this time WO are including SI's Phase 1. work only within our proposal. 'T'a,;k 4— Contract Dor urnerit Preparation We ai iddpate the Cityi:aking the lead on the contract documents. We anticipate this project will bid as one schedule and that the bid documents will be based on the Washington State Department of Transportation "Standard Specifications for Road, Bridge and Municipal Construction, 2012", modified and amended as appropriate. Our understanding is that the City will incorporate our 'Special Provisions"within their specifications. It is asscrcned that the City will advertise, open bids and award the project with support from PACF. Task 5 —QA (Q"aHty Assurance) In order to assure that the final plans and contract documents are complete, accurate and appropriate, PACE will conduct a Quality Assurance review of the final docurents prior to final (1000/0) submittal to the City. The review will consist of a complete sheet-by-sheet and contract document review to assure the City thatthe documents meet"level of care"of our industry and are the highest quality possible. Task 6 — Construction Services es (Optional Task) PACE is a full-service engineering and surveying company that will be pleased to provide the following construction services to the City of Kent in support of this project if requested by the City. PACE proposes the following services during construction: 1. Bic] assistance (City will advertise the project) 2. Construction management 3. Construction surveying/staking 4. Construction inspection 5, Compaction tesCing 5. Shop drawing review 7. Progress payment: processinq S. Record drawing preparation The above scope of woelc arid subsequent fees has been based on the following assumptions: 1. AutoCAD files of the site survey will be provided by the City to PACE. 2. PACC will not be. required to perforin any survey vdoric. Survey will be the responsibility of the City. ', ;E a 60 iin5h inne aniapas Mr. Mark Madfai City of Kent October 23, 2013 Page 4 3. No hydrologic modeling is required. Lxisting data will be used for the inflow Into the lagoon. 1, Na hydraulic modeling is required for Mill Creek or the Green River. Green River water, surface elevation will be based on published flood data. S. System Interface will provide a separate budgetfor programming during the construction phase. 6. City to provide contract documents with PACE providing additions to the special provisions as required. 7. All permitting will be done by the City. 8. The City will provide geotechnical and environmental studies as required for this project:, 9. It is assumed that 3-phase power will he available to the site. 10, This hudgei; does not include major revisions to the scope of work. Fee Estirksate. DACE proposes to provide these services on a time and expense basis. The estimated cost for each fast( is shown below based upon our 2013 Standard Rates, Estimated direct reimbursable expenses are included in the contract amount. Task 1 $12,640 Task 2 $1,06,02.4 Task $37,1.44 Task 4 $1.2,960 Task 5 $3,120 Reimbursable expenses $2,695 TOTAL COST :$174,53 3 00 In summary, we have developed a scope of work and budget based on our present knowledge of the proposed project. We have tried to cover all aspects of the proposed project; however, if you feel ghat additional areas of work require our attention, if you have any questions or if you desire additional information please do not: hesitate to contact us. Again, we are pleased to submit this scope of work to accomplish the Civil Engineering tasks far this exciting and challenging project. We look forward to vlorking with you. Sincerely, FACE Engineers, Inc. Ken Nilsen, P.C . 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CIIon it Sub F,"r T.W rm.1 DESIGN HUDGFT $75 ----------- in '!eI,Llr,,:OADCAILCIJUOILJI,tl SLf,VICLSIZING 2 I 1,2an Sl rL OVES,GATICIJS R 6920 U-NLRIllHJM Sifil $210 AYU,J, OIPHCIV�ir 2 2 ------ --------- PREDESIGN DRAWINGS 1 PRELIM HF FYSITE PLAN 2 2 ESEJ i [ IH I I PRELIM ONL MINE 2 2 $380 1 PRELIM CLCCJHICA!L EQUIPUzW1 -AYOU- 2 2 $495 MEETINGS-OVNERICILIHir COO?DINAI 1ON 13 $920 fTL OWG 3 -2-l-7-' GENLOAL LWGS GLMBOLS 9 LECENj blEIAJ-SSI,l I I OlElAI-SSI 12 1 6 I UPELARE UPGNAM Al 11 12 ELLVAInNS 3 Ai914 I SC EDUt Fs f,'AM LOAD CLII CE, a 3 PLAN DWGS t 9I-EC7R CALSITE P AN 12. $1605 i nu��Fj�:�G PC��CR PLAN 8 2 FAJ D Cljl5T&COI)TROLPWJ a 51,i45 INST S CONTROL JUIC)OWES CD PUIITI'.]N'C1IT H GYET EMS INI LIRFACE 12 s I mo TTL DING 9 MISC SPR-JFIGAl],];IS 12 313611 CONTPOI.Sl RFI Lf;IFS 4 &Qwww) L Cl-lr.qT COF,.O1NATCN F `_920 W1,1PEVIF FAC6m3F3%ILLUICS .i 4hy FINAL 8 SnB labI ---------1 � -j— ' I I;LH XPFIl F9 $-3 IFA DFSVAICI-, C1R N EVE16-Is I 0F I 63 SYlps-lan's Interface Inc. 1916 27— Siw.t of m#14 102 m Bnth�.11,NaahmgF�n 38071=7408 A USA a Tel 426 401A 225 m Fax;42.5.481 2115a wwwsys,ems-intehace.com John McAlpine October 12"',2014 PACE Engineers QS13JOl l 11255 Kirkland Way Kirkland,WA 98033 425,827.2014 TEL 425.383.5043 FAX Re: City of Kent Green River Natural Area Pump Station Project Fli Jol1n, Thank you for the opportunity to provide Professional Engineering services for the (;fly of Kent Green River Natural Area Pump Station project. Systems Interface proposes to prepare bid specification package docurnents and provide programming services for the Pump Controls, Telemetry, and SCADA portions of the project_ Note that Systems Interface is a Washington State Licensed Consulting Engineer firm in both Electrical and Control System Engineering (41135). All work products will be stamped and signed by a Professional Engineer. Our proposed scope of supply for this project includes: Prepare bid specification text and drawings for the new Pump Station. The specifications will include Division 16(partial) and Division 17 (complete,. Significant equipment that will be specified include: o Pump Motor Controls, o Variabe Frequency Drives or Soft-Starters (as detennii7ed during design), n Motor Contactors and Overload Protection, Instrumentation (including flow Rate, Water Level, Temperature, etc.), Chemical and Water Quality Analyzers (such as Turbidity, lot I, etc.), o Telemetry and Control Panel, Intrusion Monitoring (via Limit Switches, PIR Motion Sensors, etc.), Security Video Recording with several EthernetllP cameras, Backup Levcl Detection (float based), c Check Valve Position Monitoring (via Limit Switches), n Programmable Logic Controller(Siemens S7 series)with 110 as needed, c Local Operator Intei face Touch-screen, o Radio(or Ethernetllnternet) Communication Interfaces, Power Monitoring, r, Interfaces to Generator and ATS systems, 11 SCADA Interfaces at the Master Telemetry Station. Utilize the recently completed James Street and foster Park Pump Station designs as templates for this new station. Evaluate ConinnunicatiGn plans for telrnnctry to and from the headquarters (including I:rldin, Fiber, Coax, Internet, Cellular Modem, and Land-Line techniques). a Attendance at one design coordination meeting at PACE m City of Kent offices. p Provide pre and post-award technical services including submittal reviews and request for information responses (listed as Phase 2 in summary). Optional Engineering services to program and test-the new Felemetry and Controllci systems that will be installed at the Pump Station Optional Fngineering services to program the Operator Interface Unit for the new Pump Station. Configure, commission, and test telcnlotry communications from the Pump Station site to the headquarters. Page 1 of 64 }r "e . -,fie Inc 1913 220"' ,troet SE.NA-102 8 60thell,Washingr0n 98021-7406 6 USA.Tel 425,481,1225 Far e25.48I 2115 a vww syetems rnf�rface cony Provide supplemental services after the bid process including factory inspections and tests, on- site inspections and tests, complete system commissioning, training, &as-built doctunentatlon. ® Prepare an Engineer's Estimate for the Pump Controls, Instrurnentation, Telemetry, and SCADA portions of the project cost. We can break the above scope items into 2 phases: Phase 1 Prepare Division 17 bid specifications and drawings- Phase 2: Provide post-award technical services including submittal reviews and Request For Information rdsponses. Below is an estiruated puce break-out tor each of the phases and total proposed Not-To-Exceed budgets: PHASE 1: Prepare Bid Specifications & Drawn s J Description Ratelhr I-std-Irs rotor Jior& Prof Irol@Ctcngiag� esslonalEngineer — $1n 6 $150 -__ 16 partial including coprdinatiorIL $98_ 20 $1,960 Project Engineer(Div. 17, complete) $98 40 $3,920 Technical Dlafung�applox 12 drawings created) $75 28 $2,100 Armin Support(copy&transmit documentat±on etc, $ '0 5 $300 Project expenses (mall. copies, supplies, mileage eta) —_ $150 1 Contingency�ncy {reviews, revising de,,jigns, bid addenda) $100 8 $800 Phase 1 11 $9,980 PHASE 2. Suhrnittal Review, RFI's, Ghange Orders Description Ratelhr Est.Hrs Project Manager& Professional Engineei_ $125 2 T $25D Project Engineer _ $98 8 $784 Admin Support(copying transmit, archive) $co 2 TechnicalDiaftinq (approx 2 revised drawings $75 2 $150 Project expenses (mail, paperupplles, mileage etc,)_- Contingency (responding to questions, meetings $100 G $000 revising designs additional change orders)__ _ � Phase 3 Tf?TAEt $1,95Q Note that modifications will need to be performed on the Master Telemetry Panel at the City headgUarters in order to communicate with the new Pump Station, provide status information to the operators and notify personnel on alarm conditions. Wo would include the modification work and related programming as part of a proposal to general contractors during the bidding phaso of this project. We propose that we bill PACE on a Time and Material basis with a Not-To-Fxceed Professional Services contract. Systerns Irdertace will invoico only for actual time spent on the project and not exceed the maximum contract value, vVhile guaranteeing to provide all agreed upon scope of work items, We would invoice oil a monthly basis+,vith detailed Timecard and expense information attached. Delivery of initial (60'%) bid design doGUmepfS would be. approximately three weeks from receipt of a Notico to Procoed; I. other phases of the project would be coordinated with PACE, the City, and the General Contractor. Thank you again for the opportunity to work with PACE. Please call or e-mail with any questions or concerns. Sincerely, Systems 6rtarrace Inc, Robert 1-1. Schommer, P:E Vice President epallrhs�syalans-Intcrracc con', Page ? of 2 65 PUBLIC WORKS DEPARTMENT Timothy J LaPorte P.E., Public Works Director Phone: 253-856-5500 KEN T Fax: 253-856-6500 WASH IN GTO N Address: 220 Fourth Avenue S. Kent, WA 98032-5895 Date: November 13, 2013 To: Chair Elizabeth Albertson and Public Works Committee Members PW Committee Meeting Date: November 18, 2013 From: Mark Madfai, P.E., Engineering Supervisor Through: Chad Bieren, P.E., City Engineer Subject: Agreement with Historical Research Associates for Archeological and Historic Preservation Services for the Green River Natural Resources Area Pump Station Project Item - 6b Motion: Move to recommend Council authorize the Mayor to sign a Consultant Services Agreement with Historical Research Associates in an amount not to exceed $13,537 to provide archeological and historic preservation services for the Green River Natural Resources Area Pump Station Project, subject to final terms and conditions acceptable to the City Attorney and Public Works Director. Summary: The Public Works Department will be constructing a pump station at the Green River Natural Resources Area (GRNRA). This project will allow the GRNRA to accommodate additional stormwater during high flow events, to help prevent flooding in downtown Kent and nearby industrial areas. This pump station will be quite large; it will be designed to pump 30 cubic feet per second (cfs), or about 225 gallons per second of water with a future capacity of 50 cfs from the ponds and into the Green River during high flows. The pump station design will also include a fish/sediment screen to keep fish and sediment out of the pump station. Pump station design is a specialty engineering service that the City does not have the expertise to perform in house. Budget Impact: This project will be paid for with the storm utility funds. There are no unbudgeted fiscal impacts. 66 This page intentionally left blank. 67 TIfSTORICAZ ;t T SEARCIq Eu A4SOCIATES, INC. ve Area 91 x�( p ( � p� P tsa Are_:��`a �,-Cil[) '.a"`k� b. p E ^..�r� rc, J. 1 aRA is pleased to provide CuICL11al resources services for the Green River Natural Resources Area Pump Station Project (Project) located in the P�g County,Washington east of Kent. The following Scope of Work(SOW) and Cost Estimate (CE) arc for a cultural resource inventors for Alternative 4 of the project, the addition of a new pump station, outfall force main and Green River outfall. 1 .0 Project Approach The City of Kent (City) is proposing to restore the Green River Natural Resources Area (GRNRA) lagoon outtet, detention, and water duality treatment functionality, replace missing components, and improve flow control to Mill Creek. One alternative within this proposed project, referred to as Alternative 4,involves the instillation of 1,550 linear feet of a 42" force main from a new pump station to the Green River. For the purposes of the SOW, I IIZA is assuming that the Area of Potential Effect (APE) for the project will be the area of direct ground disturbance. This will be a trench 5 feet wide and 8 feet deep for the length of the 1,550 foot line, a 30 foot buffer around the pump station and outfall, and a 15400t buffet ni both directions from the centerline of the force main. For the length of the force main, this includes an existing gravel road and its shoulders. As it is in an undeveloped area, HRA anticipates drat there will be no impacts to any elements of the built environment; therefore no above-ground/'arcllitecttn-al study will be requii ed. it quidk review of the Department of Archaeology and Historic Protection's (D AIIP) web site indicated that a historic resources survey and in rentory of the City of Kent has heen conducted which included the project area. Two Historic Property Inventory (I 1 PI) forms have been filed for residences within a 14 wile of the project. No archaeological sites or National Register eligible properties have been recorded in the project area or near vicinity. It is our undetstanding that the work is to be conducted nl anticipation of compliance with Suction 106 of the National I listoric Preservation Act, likely due to the need to obtain a permit from the US 68 Army Corps of Engineers pursuant to Section 404 of the Clean Water Act of 1972. The lead federal agency or their designee will conduct Native American Consultation in compliance with Section 106, and they will formally define the Area of Potential Effects (APE) in consultation with DAHP. As a result, this scope does not provide for formal consultation with the"Tribes, definition of an APE, consultation with the Washington State Historic Preservation Officer (SHPO), or others that may have an interest in the project; it is expected that the lead federall agency and/or the City, will fulfill this responsibility should the need arise. Following the fieldwork, HRA will prepare a cultural resources technical report according to the guidelines provided by DAHP. Under this proposal HRAwill conduct the following tasks: 1. HRA staff will conduct a records search of the Washington Information System for Architectural and Archaeological Records Database (WISAiRD) at DA1TP to determine what previous studies have been conducted in and near the Project area. Research at DAHP will identify previously recorded archaeological and historic sites in the project vicinity. LIRA staff will conduct additional background research in I IRA's cultural resource reference library. Information obtained from these repositories will help to establish the cultural, historic, and environmental context for potential resources in the vicinity. 2. As of January 1, 2013 the State of Washington is requiring that consultants/contractors call for utility locates prior to conducting fieldwork. "1'he City of Kent will arrange for the utility locates to be complete by the start of fieldwork. 3. Using maps of the Project property and design plans provided by the City, I IRA will conduct a 100 percent archaeological pedestrian survey of the API:,. Archaeologists will walk transacts along the entirety of the APR. During this survey, archaeologists will seek out and examine ground exposures (e.g., ditches,plowed areas, etc.). While conducting the survey IIR.A will excavate archaeological shovel or auger probes to further assess the probability for buried culnzral materials. River valleys are high probability locations for encountering archaeological sites. Since the proposed impacts reach to depths of S feet and the alluvial esivirorument along the river makes it possible for archaeological sites to be found at great depths, HIZA proposes a sttatcgy of auger probes at relatively close intervals. These will be conducted by a field supervisor and 3 archaeological technicians over a period of 3 days. FIR_A proposes to excavate up to 25 auger probes at approximate 65 foot intervals along the entire length of the project alignment.Auger probes can reach up to 9 feet deep with handle extensions, but because of the expected compaction of the gravel road surface, each probe is expected to need to be initiated with breaker bar and/or shovel. The excavated sediments will be screened through 'a-inch mesh to ide:ntifv any small artifacts or other cultural evidence. Probe placement will be up to the judgment of the field supervisor based on the Projects design plan, topograpluc circumstances, and other field observations. Cultural items G ecr C el 1--,II ,� Resources Area Pump Ste�rjor, project Culwral(asotnc f'Iventor' 69 found will be. documented on HRA probe forms and, if diagnostic, by digital photography before being returned to the excavated hole. 'The sediments observed in each positive probe hole will be described on the probe form and in the field superaisoi s field notes, including evidence of subsurface disturbances and cultural material integrity. The probes will be backfilled immediately following their termination and recording, and the teuf replaced. The location of auger probes will be documented using a Global Positioning System (GPS) instrument. The results of conducting the probes-will be induded in the Cultural RCSOLtrces Technical Report. 4. If archaeological materials are found, the toci tion and the cultural materials found will be documented on a Washington Archaeological Site Inventory form. Photographs will be taken to accompany the form and a sketch map will be prepared showing any intrasite resource patterns and the site in relation to the surrounding topography and devclopinents. The location will be documented using a GPS instrument. The attached cost estimate assumes that no more than one archaeological site will be recorded by this project. 5. 1 TRA will prepare a brief Cultural Resources 'Technical Report summarizing the results of the project. This report will reflect professional standards for format and content as espresse.d in the guidelines prepared by DAHR A draft of die report will be submitted to the City of Kent for comment in electronic format (Adobe pdf). HRA will make any necessary revisions to the Draft report in response to comments by the City and will submit three hard copies,including one copy with tie DAT 113 submittal form inserted, and an electronic version of a final report. The report will include. ® A description of the project and applicable laws and regulations, Q A summary of the results of the background literature and records research, T'he methods used during the fieldwork and the results, a A description of any cultural resources found, v A summary, assessment of poten al effects to any idenmfied resources based on our knowledge of the resource type, soil conditions, and extent to which the,proposed project may affect the resource, a Recommendations for completion of any additional cultural resources compliance obligations stem nuig from the results of our study, * A sunhrmary of project procedures that should be followed in the event of an unanticipated discovery of buried cultural materials or human remains during construction, and ;.yen rvoi (latu.al Resuu;un Area Pwup S*.twn �'> > _'t Cu=tuna Resowccs n TI�r,ry 70 ® References cited. The report will include such tables,traps,photographs, and other graphics as ate needed to depict the scope of the study and results. Dorms for any recorded resources 'Vvill be included in an appendix to the report. 6. H RA will respond to continents by DAHP on the Final Report and subm t a second set of deliverables (three hard copies, one electronic) with any required changes. 7. HRA staff will be available for teleconferences with the City, Tribes,Agencies and DAHP, as nccessary, rcgarding the project and our findings. 2.0 Schedule HRA staff can initiate the first task of the Project (backgtound research) within 5 business days of written notice to proceed (NTP) and acceptance of this SOW and Cost Estimate from the City (c- mall N'lP is acceptable).The fieldwork Will be scheduled within 10 days of the background research dependent on the timing of the utility locate sureev. HRA will attempt to schedule[lie fieldwork When it is convenient for tribal visitots, if applicable,but the fieldwork should not be unnecessarily delayed solely for this purpose. Compilation of the project results and preparation of the project report will be completed within 30 days of completion of the fieldwork. HRA will produce a final report within 10 days of receipt of comnnents on the draft report, submitted electronically and on a CD. Delays to this schedule resulting from the actions or inaction of other parties cannot be HRA's responsibility. .3.0 Cost Proposal 11RN proposes to conduct the inventory (Tasks 1-7 described in Section 1) on the schedule presented in Section 2 for a cost of$13,537.00, applied on a time and materials basis (see attached spreadsheet). HRA changes their billing rates on an annual basis. While the schedule for this project is expected to retrain within the current calendar year, if the project continues past December 31, 2013 the cost estimate will be revised to reflect those changes. Out cost estimate has been calculated with the Following assumptions in mind: I IRA will have full access to the project area,including vehicle access,with approved tights of entry to conduct subsurface probes within the.APE. HRA will not be responsible for obtaining ROE. m HRA Will excavate up to 25 auger probes using a Project Archaeologist, and 3 Field Technicians ecii R tic Hw.t ral Resources Arai Pump .tt hnn Pro ect C�Atui u cc,;tr,rce, 1 wentory 71 ® No more than one archaeological site urill be identified and recorded. Teleconferences with the City will not exceed two hours over the term of the project. ® The City of Kent will provide a text description of the proposed project for HRA to use hi its report. ® The City of Kent will provide maps (G1S shapefiles are preferred) of the project area and design plans of the proposed project to HRA in a format that can be adapted for use in its report. ® Reporting will not include the preparation of NLPA or SHPA document sections or agreement documents (e.g, Memoranda of ,lgreenhent). N6i LI : REsoarces Aroa Punnp Sta�ion P*o7 ec_ Q.=6:ural }Zesaurco> nvenwry Lit, 2013 5 72 i HISTORICAL RESEARCH ASSOCIATES,INC Revised Cost Estimate Green River Pump Station Cultural Resources Inventory Task i Task t Task 3 Task 4 Task 5 Administrative Fieldvorh Response to Di P rolect Recortls Background prepa,alimt and Draft Report Final keport Comments! PROJECT TOTAL Administration Management Research Fieldwork Second Final Repod Labor Category Rate Hours Total Ten. Total Hours Total Hours Total Hours fact Hcars Total Hours Total Hours Total Senior Arcb..111,st-H1I¢ S43.25 2 S87 2 587 1 43 6 60 Prolacl Archaeolaglst-Schultze $23.00 5 $115 2 645 20 $480 32 $736 36 $528 6 $1e4 6 $138 409 $2,5a7 A¢haeorHr—ITechnlcan-x4 519.00 2 $38 72 $1368 e $152 82 $1,568 Jo,hcs Tacbmaan-Fr.ziei $19.14 2 $38 6 $115 1 $19 9 $192 Fdltnr $21.40 2 $43 1 $21 3 $64 Pmd—i.n Se,H.Ist $27.21 2 $54 1 $27 i $27 4 $109 Cledcal1 $15.75 2 $32 2 $32 Project Adnin:shstor $23,54 2 $47 2 $47 campuler Supped S31J1 2 $63 2 $63 Labor Subtota 13 $346 2 46 22 498 106 .2, 42 56 $1,2]9 12 $295 tl 8 219 $4,812 '.. Cverhead 142.00% $488 $65 $707 $3.042 $1,816 $419 $296 S6,031 Fee 10.00% $83 $11 $121 $518 $309 $71 $50 $1.164 Labor Total 9 51,326 $5,I03 3, 0 J05 555 $ ,8 Reimbursable Expense Rate Unita Total butts Total Units Total Units Total Units T01a1 units Total units Total units Total I ravel fiental Car Wag 4 $320 4 $320 Hento Tar Opetatics=xp%lu. 50.35 144 Ste 144 $50 CPS Li- 165.09 3 $195 3 $195 D g tal Cana,e Image $0.1a 35 $4 35 $4 Te,Scanning $025 10 $3 10 $3 CD Rat Ga'.aC❑ $5.00 1 $5 1 $5 2 $10 Ropart Pmduclbn $0.15 200 $30 20U $30 400 $60 Photorop%!liwiouse) go 10 10 $1 50 $5 60 $6 Tcicpbon JFax $1.00 5 $5 5 $5 Nlsaellaneous Supplies $2,00 2 54C 2 $40 Adninletmlive Fea 55, $31 $2 $2 $35 OTrect$ubtolal 51 5652 $3] $3I $ 2] TASK TOTAL $915 _ $122 $1.321 $6,355`T^ _ $3,404 E622 $592 $13.537 .'1-' eelimatas. `Per rem will be pale acccrmm to IRS regulations. Fiscal revi,y.. Project Total $13,537 Gen no Curt" Submlltatl by. Sult"It d nr Cdolk r24,2013 crept H¢ks ASSUMPTIONS: _ee. ie ,fem I,(SOW)a11-hod. 73 PUBLIC WORKS DEPARTMENT Timothy J LaPorte P.E., Public Works Director Phone: 253-856-5500 KEN T Fax: 253-856-6500 WASH IN GTO N Address: 220 Fourth Avenue S. Kent, WA 98032-5895 Date: November 13, 2013 To: Chair Elizabeth Albertson and Public Works Committee Members PW Committee Meeting Date: November 18, 2013 From: Mark Madfai, P.E., Engineering Supervisor Through: Chad Bieren, P.E., City Engineer Subject: Contract with Geo Engineers Inc. for Geotechnical Engineering Services for the Green River Natural Resources Area Pump Station Project Item - 6c Motion: Move to recommend Council authorize the Mayor to sign an Agreement with Geo Engineers Inc. in an amount not to exceed $27,526 to provide Geotechnical Engineering services for the Green River Natural Resources Area Pump Station Project, subject to final terms and conditions acceptable to the City Attorney and Public Works Director. Summary: The Public Works Department will be constructing a pump station at the Green River Natural Resources Area (GRNRA). This project will allow the GRNRA to accommodate additional stormwater during high flow events, thereby preventing flooding in downtown Kent and nearby industrial areas, where low-lying streets, parking lots and warehouses are inundated nearly every year during high-flow events in the spring and winter months. Geotechnical engineering services will be required to design the foundations for the various elements of the pump station as well as the coffer dam required within the pond area. Budget Impact: This project will be paid for from the storm drainage fund, with no unbudgeted fiscal impacts. 74 This page intentionally left blank. 75 EXHIBIT A SCOPE OF SERVICES GEOENGINEERS, INC. GREEN RIVER NATURAL RESOURCES AREA PUMP NATION KENT, WASHINGTON OCTOBER 24,2013 FILE NO. 0410-187-00 SCOPE OF SERVICES — GEOTECHNICAL The purpose of our services is to conduct subsurface explorations and laboratory testing as a basis for developing geotechnical design and construction recommendations for the Green River Natural Resources Area (GRNRA) Pump Station project in Kent,Washington. This project consists of constructing a pump station adjacent to the Green River Natural Resources Area Lagoon that will pump excess water from the lagoon into the Green River through a 42-inch diameter force main. The pump station will have an inlet and foundation elevation of about 13 feet(15 to 20 feet below existing grade). The force main will have an invert elevation of about 21 feet at the pump station and about 32 feet at the outfall. The force main is consistently about 5 to 10 feet below current existing grades and follows the alignment of an existing gravel road. Construction shoring and cofferdams are anticipated for the construction of the pump station. The force main outfall pipe is anticipated to be constructed with an open cut. The project is currently scheduled to begin construction in Summer of 2014, Our scope and budget does not include any construction management, monitoring or inspections. Our geotechnical scope of services will include the following items: 1. Review existing soil and groundwater information including published geologic maps and select data from our in-house files. 2. Coordinate clearance and location of existing underground public utilities in the project area. We will contact the Washington Utilities Coordinating Council "One Call"service prior to beginning explorations. We request that City of Kent personnel confirm that exploration locations are clear from potential damage to City-owned underground utilities. 3. Drill four borings using hollow stem auger drilling techniques and install monitoring wells in the explorations. One boring will be completed to a depth of 60 feet below ground surface (bgs) in the vicinity of the proposed pump station. Three borings will be completed to depths of 20 feet bgs along the proposed force main alignment. The wells will include electronic water level data loggers. The data loggers will collect and store groundwater level data from multiple readings per day. 4. Complete laboratory analysis of select soil samples. We anticipate that our laboratory program will consist of grain-size analyses and moisture content determinations. 5. Provide at least two rounds of groundwater monitoring. We will measure groundwater levels in the wells during installation to provide data for our design report. We will also retrieve groundwater data 76 City c tie, t. Qctober 24:"?.o:t,1 from the electronic piezometers and measure levels again prior to construction bidding to provide more up-to-date groundwater information for contractors prior to bid. 6. Investigate the proposed intake structure subgrade. We anticipate our investigation will consist of probing the bottom of the lagoon from a rowboat or similar craft. We will attempt to determine the depth to firm soil and the depth and consistency of sediment that has accumulated at the bottom of the lagoon since it's initial construction. We have budgeted for one day of field work and two staff engineers to complete this task. 7. Provide a discussion of temporary shoring and dewatering. We are assuming that the dewatering and shoring system will be designed by the contractor. We will provide a general discussion of shoring and dewatering issues at the site and comment on the feasibility of different shoring and dewatering methods. We will also provide lateral earth pressures for the design of shoring systems and an order of magnitude estimate of dewatering quantities. 8. Provide recommendations for pipe bedding, pipe support and excavation backfill. We will provide recommendations for imported fill, reuse of on-site soil as appropriate and compaction requirements. 9. Provide recommendations for shallow foundations and small drilled pier foundations for support of equipment pads and roof structures. We will discuss bearing surface preparation and shallow drilled pier construction. We will also provide design criteria, including allowable soil bearing pressures and allowable lateral resistance values for the design of foundation elements. We will specifically address recommendations for footing preparation of the intake structure. 10. Complete buoyancy calculations on the proposed underground structures based on measured groundwater levels and the provided dimensions and weight of the structure. We will provide a discussion of methods for restraining the structure if buoyancy is determined to be a problem. 11. Prepare a geotechnical design report presenting the results of our explorations and summarizing our findings and recommendations. We anticipate this report will be available four weeks after site explorations are complete. We will also prepare a brief technical memorandum presenting the second round of groundwater monitoring data and revising our recommendations if appropriate. This memorandum will be provided during the spring or summer,after winter groundwater levels have been measured. 12. Provide additional consultation as required and requested. We anticipate that this could include meetings or plan review. We have budgeted 8 hours for a project engineer to cover this contingency. Our scope and budget does not include any construction management, monitoring or inspections. We will provide a scope and budget for these services upon request. I IS Gt+nl:a Attachment '.. Exhibit 81 Fee Estimate Disclaimer.Any electronic form,facsimile or hard copy oftho original doanneut(Innul,text,table,mid/oi beard,Ifprovided,and any attachments aee onl aCopy of the original document.Tire original document is sto ed bq Geanginaers,inc.and Vail serve as the o(iicioi IiIIIOntOf record. p r96n r n;d`lRPFP.S / u ryJ 77 EXHIBIT BI FEE ES71VEE,ATE CITY OF KENT ENGINEERING DEPARTMENT GEOTECHNICAL ENGINEERING SERVICES GRNRA PUMP STATION KENT,WASHINGTON FILE NO. 0410-187-00 Classification Hours x Rate = Cost Senior Principal(Gary Henderson) 6 x $215.00 = $1,290.00 Senior Engineer(Lyle Stone) 36 x $165.00 = $5,940.00 Staff Engineer 2(Erik Ventura,various) 70 x $115.00 = $8,050.00 Support 12 x $85.00 = $1,020.00 '.... Subtotal Personnel $16,300.00 Other Expenses Subcontracted Drilling $8.800.00 Laboratory $926.00 Expenses(Mileage, Data Loggers,Sediment Sampler,etc.) $1,500.00 Subtotal $11,226.00 Total Estimated Costs $27,526.00 Hello OA tG-187-00 October 23,2013 UE0 p'NCa I N c ERb 78 This page intentionally left blank. 79 PUBLIC WORKS DEPARTMENT Timothy J. LaPorte P.E., Public Works Director Phone: 253-856-5500 KEN T Fax: 253-856-6500 WASH 1NGTON Address: 220 Fourth Avenue S. Kent, WA 98032-5895 Date: October 24, 2013 To: Chair Elizabeth Albertson and Public Works Committee Members Special PW Committee Meeting Date: November 18, 2013 From: Mark Howlett, Design Engineering Manager Through: Chad Bieren, P.E., City Engineer Subject: Consultant Services Agreement/ Northwest Hydraulic Consultants Inc. - County Road 8 Levee Item - 7a Motion: Move to recommend Council authorize the Mayor to sign a Consultant Services Agreement with Northwest Hydraulic Consultants Inc. in an amount not to exceed $18,194 to provide hydraulic analyses in support of levee certification for the County Road 8 Levee Project, subject to final terms and conditions acceptable to the City Attorney and Public Works Director. Summary: The City's County Road 8 Levee is located between State Route 516 and Washington Avenue. This project will reconstruct the levee to certifiable standards and is important for managing the City's flood protection. Northwest Hydraulic Consultants services will include hydraulic modeling of the proposed County Road 8 levee. The modeling results will be used to design levee improvements to support a Conditional Letter of Map Revision (CLOMR) submittal to Federal Emergency Management Agency (FEMA). The product of the analysis will be mapping and tabular data showing the area that will be removed from the FEMA floodplain if the Country Road 8 Levee were certified and connected to the upstream and downstream certified levees. Budget Impact: Stormwater utility funds will be used to pay for this consultant work. Existing storm drainage rates assumed the City would cover a portion of the costs to fund levee reconstruction. Public Works staff continues to look for outside funding and lowest cost alternatives for levee certification. 80 This page intentionally left blank. 81 SCOPE OF WORK AMENDMENT TO HAWLEY ROAD CLOMR APPLICATION — COUNTY ROAD 8 EXTENSION DESCRIPTION OF WORK / PROJECT OBJECTIVES The objective of this amendment is to conduct additional analyses and mapping necessary to add County Road 8 and the SR 167 and SR516 highway abutments to the existing Hawley Road CLOMR submittal. TASKS, ITEMS, AND WORK PRODUCTS NHC shall furnish all services and labor necessary to complete the following tasks. Based on inspection of existing model outputs and plans provided by the City it is assumed no additional riverine modeling runs are required. Support for Geotechnical Analysis: NHC will provide hydraulic information and support for GeoEngineers in their analysis of levee stability. It is assumed that existing information will be sufficient for this task as the County Road 8 extension is setback from the River and other areas have been previously analyzed. NHC will also assist in modification to the MT-2 form being prepared by GeoEngineers and the City. Interior Drainage Analysis: NHC will update and modify the existing Hawley Road/Foster Park interior drainage analysis as necessary to reflect the proposed County Road 8 extension. It is assumed the previous methods used will prove sufficient for updating of the analysis. Annotated FIRM and Work Maps: The Hawley Road annotated FIRMs and work maps will be updated to reflect changes due to the revised interior drainage analysis. Deliverables: A new CLOMR hydraulic submittal package will be prepared following the standard deliverable format submitted in prior CLOMRs. This includes updated maps and reports, GIS files, and model files. Proposed Staff: The Principal-in-Charge will be Mr. Todd Bennett. Mr. Vaughn Collins will serve as project manager and senior engineer, and Alex Anderson and Sam Gould will serve as engineers. NHC may utilize other staff as needed. Schedule: NHC and Kent shall jointly agree to a schedule for each deliverable. Cost: Costs shall be billed on a Time & Materials basis, and total charges shall not exceed $18,194. Hawley Road CLOMR —County Road 8 Amendment October 31, 2013 , ! ! ! ! z , co MO _ o \ \ \ \o ) > } zz ; o 04 OD o o : \o o _ _ § o ~ R \ - o \ 71 o o o \ « - - \ r ! ) ) : \ ! § : Zt ; i \ : / ; ] { } } M ! M f 83 PUBLIC WORKS DEPARTMENT Timothy J. LaPorte P.E., Public Works Director Phone: 253-856-5500 KEN T Fax: 253-856-6500 WASH IN GTO N Address: 220 Fourth Avenue S. Kent, WA 98032-5895 Date: October 24, 2013 To: Chair Elizabeth Albertson and Public Works Committee Members Special PW Committee Meeting Date: November 18, 2013 From: Mark Howlett, Design Engineering Manager Through: Chad Bieren, P.E., City Engineer Subject: Consultant Services Agreement with GeoEngineers, Inc. for Engineering Services for the County Road 8 Levee Project Item - 7b Motion: Move to recommend Council authorize the Mayor to sign a Consultant Services Contract with GeoEngineers, Inc. in an amount not to exceed $37,865 to provide engineering services and a certification report for the County Road 8 Levee Project, subject to final terms and conditions acceptable to the City Attorney and Public Works Director. Summary: The City's County Road Levee is located between State Route 516 and Washington Avenue. This project will reconstruct the levee to certifiable standards and is important for managing the City's flood protection. GeoEngineers services will include geotechnical design recommendations related to design of new levee sections required to certify the County Road 8 Levee. Budget Impact: Stormwater utility funds will be used to pay for this work. Existing storm drainage rates assumed the City would cover a portion of the costs to fund levee reconstruction. Public Works staff continues to look for outside funding and lowest cost alternatives for levee certification. 84 EXHIBIT A GEOENGINEERS, INC. HAWLEY ROAD AND COUNTY ROAD 8 LEVEE CONNECTION DESIGN,ANALYSIS,AND CERTIFICATION GREEN RIVER, FROM CENTRAL AVENUE BRIDGE TO SIR 516 BRIDGE ET,WASHINGTON NOVEMBER 5,2013 FILE NO. 0410-175-04 INTRODUCTION The purpose of the project is to connectthe existing Hawley Road Levee with the downstream levee at State Route 516. The preliminary alignment indicates that the project will consist of an approximate 800-foot- long earth berm levee that connects at the upstream end with the Hawley Road levee at South 251stStreet and at the downstream end with the State Route 516 fill berm. Large modular block walls (Ultra-Block or similar)will be used to retain portions of the levee fill. A 900-foot-long section of State Route 516 will need to be analyzed and certified as a levee. The purpose of our services will be to conduct subsurface explorations as a basis for developing design recommendations and completing analysis for the certification of levees. SCOPE OF SERVICES Our specific geotechnical scope of services for the Hawley Road and County Road 8 from Central Avenue Bridge to SR 516 Bridge Levee Connection Design includes: 1. Review existing information, including in-house reports, reports by others provided by the City of Kent and appropriate Federal Emergency Management Agency (FEMA) and U.S. Army Corps of Engineers (USACE) documents. 2. Conduct a site visit prior to subsurface explorations to coordinate exploration locations and site safety issues with the design team. 3. Coordinate clearance and location of existing underground public utilities in the project area. We will contactthe Washington Utilities Coordinating Council "One Call" service priorto beginning explorations. We request that City of Kent personnel confirm that exploration locations are clear from potential damage to City-owned underground utilities. 4. Complete up to five subsurface explorations to depths of 50 feet along the proposed levee alignment. The preferred method for explorations is to complete Cone Penetration Test (CPT) soundings using truck-mounted equipment from the apartment parking lot south of the levee alignment. If access to the parking lot is not available and we must access the proposed alignment from City of Kent right-of- way a small footprint, limited access,tracked drill rig may be required. We have included a contingency in our budget for this equipment. We understand permitting and site access coordination for explorations will be completed as necessary by the City of Kent. 85 City of Kiunt: IN orr urn b iur h 2013 11Fj("U 2 5. Complete stability and seepage analyses for proposed levee cross sections under each of the following conditions: end of construction, steady state seepage during full flood stage, sudden drawdown and seismic conditions. Stability analysis will be based in part on survey data provided by the City of Kent and hydraulics information. We anticipate developing three to four design cross sections. 6. Provide recommendations for the design and construction of retaining walls. We will provide and design soil properties for design of proprietary structural earth walls. We will also provide recommendations for incorporating retaining walls into earth berm levees. 7. Attend meetings with City of Kent and the design team or FEMA to coordinate geotechnical engineering and civil engineering design with the City of Kent and assist with levee certification. 8. Incorporate this analysis into the Levee Certification Reports previously prepared for Foster Park and Horseshoe Bend Levees. Our report will be part of the submittal to FEMA. 9. Review plans related to the earth berm levee prepared by us and the City of Kent as required for the submittal to FEMA. 10. Assist the City of Kent in revising a Draft Hawley Road Levee Operations and Maintenance manual, MT2 forms and other parts of the submittal as needed. We understand that the final operations and maintenance manual will be reviewed and completed by King County. 11. Address any comments and revise submittal as needed. This includes coordination with the City of Kent, King County, other consultants on the design team, and FEMAto incorporate necessary revisions into the submittal of the final report. i..Js:Gwri:tt Attachment: Exhibit B. Fee Estimate Disclaimer Anyelectronicfmin,facslniie of hard copy of the ofIglnaldocnnlont(oinali,text,table,and/ol'flojio), ff)rovided,findantattachrnCnLCaleonlya copy of the ohginal docnnlont.The ohglnal docnnlont Isstoned by Geolinglneois,Inc,andwill seNe as the official document of lecold. Copyright©2013. by Geolinglneois,Inc,All Highs,IeseNed. GEOENGINEERS 86 EXHIBIT B-1 r Ir Ir I Ir a u14 A FIE C11IrY 017 IhIE1 IF GIE01FIECIRITICAll H IING1llwlr`.IH Ir 1l1ING SI IRVICI:S, HAWLEY ROAD CONNECTION LEVEE GREEN RIVER, FROM CENTRALAVENUE BRIDGE TO SR 516 BRIDGE KENT, WASHINGTON FILE NO. 0410-175-04 Personnel Hours x Rate = Cost Principal(Gary Henderson) 16 x $215 = $3,440 Project Engineer 1(Lyle Stone) 60 x $165 = $9,900 Engineer/Scientist 2(Erik Ventura) 80 x $115 = $9,200 CAD Designer 30 x $85 = $2,550 Support 15 x $75 = $1,125 Subtotal Personnel Cost(direct costs) $26,215 Other Expenses Subcontracted CPTs $4,400 Contingency for Limited Access Equipment $6,000 Reproduction, Mileage, other Expenses $1,250 Subtotal(indirect costs) $11,650 Total Estimated Costs $37,865 File No.0410-175-04 y-^ November 5,2013 `'lEoEN aNIEIERT-.'ell 87 PUBLIC WORKS DEPARTMENT Timothy I LaPorte P.E., Public Works Director Phone: 253-856-5500 KEN T Fax: 253-856-6500 WASH IN GTO N Address: 220 Fourth Avenue S. Kent, WA 98032-5895 Date: November 14, 2013 To: Chair Elizabeth Albertson and Public Works Committee Members PW Committee Meeting Date: November 18, 2013 From: Mike Mactutis, P.E., Environmental Engineering Manager Through: Chad Bieren, P.E., City Engineer Subject: Information Only/King County Flood Control District Authorization — Russell Road Levee Item - 8 No Motion Required/Information Only Summary: Staff will provide maps and information on the King County Flood Control District authorization for the Russell Road Levee. Budget Impact: None