HomeMy WebLinkAboutPW-1993-0158 - Original - GAIA Northwest, Inc. - Mill Creek Stream Stablilzation Consultant Services - 07/12/1993 CONSULTANT SERVICES CONTRACT
BETWEEN THE CITY OF RENT AND GAIA NORTHWEST, INC.
THIS AGREEMENT is made this 12th day of July, 1993 , by and between
the City of Kent, a Washington municipal corporation (hereinafter
the "City") , and GAIA Northwest, Inc. organized under the laws of
the State of Washington, located and doing business at 10522 Lake
City Way N.E. , Seattle, WA 95125 (hereinafter the "Consultant") .
Recitals
1. The City is presently engaged in the restoration of Mill
Creek Canyon and desires that the Consultant perform services
necessary to provide consultation and advice to the City on the
preparation of plans, specifications, and cost estimates for the
erosion control improvements in Mill Creek Canyon.
2 . The Consultant agrees to perform the services more
specifically described in the Scope of Work, including any addenda
thereto as of the effective date of this agreement, attached hereto
as Exhibit A which is incorporated herein by this reference as if
fully set forth.
NOW, THEREFORE, in consideration of the mutual promises set forth
herein, it is agreed by and between the parties as follows:
I. Description of Work
Consultant shall perform all work as described in Exhibit A.
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II. Payment
A. The City shall pay the Consultant an amount based on time
and materials, an amount not to exceed thirty thousand
dollars ($30, 000) for the services described in Section
I herein. This is the maximum amount to be paid under
this Agreement for Tasks I-III in Exhibit A, and shall
not be exceeded without the prior written authorization
of the City in the form of a negotiated and executed
supplemental agreement. PROVIDED, HOWEVER, the City
reserves the right to direct the Consultant's compensated
services under the time frame set forth in Section IV
herein before reaching the maximum amount. The
Consultant's billing rates shall be as delineated in
Exhibit A.
B. The Consultant shall submit monthly payment invoices to
the City after such services have been performed, and a
final bill upon completion of all the services described
in this Agreement. The City shall pay the full amount of
an invoice within forty-five (45) days of receipt. If
the City objects to all or any portion of any invoice, it
shall so notify the Consultant of the same within fifteen
(15) days from the date of receipt and shall pay that
portion of the invoice not in dispute, and the parties
shall immediately make every effort to settle the
disputed portion.
C. In the event the Scope of Work is modified or changed so
that more or less work or time is required by the
Consultant, and such modification is reached by mutual
agreement of the parties to this contract, the payment
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for services and maximum contract amount shall be
adjusted accordingly upon agreement of the parties.
III. Relationship of Parties
The parties intend that an independent contractor-employer
relationship will be created by this Agreement. As Consultant is
customarily engaged in an independently established trade which
encompasses the specific service provided to the City hereunder, no
agent, employee, representative or sub-contractor of Consultant
shall be or shall be deemed to be the employee, agent,
representative or sub-contractor of the City. In the performance
of the work, Consultant is an independent contractor with the
ability to control and direct the performance and details of the
work, the City being interested only in the results obtained under
this Agreement. None of the benefits provided by the City to its
employees, including, but not limited to, compensation, insurance,
and unemployment insurance are available from the City to the
employees, agents, representatives, or sub-contractor of the
Consultant. Consultant will be solely and entirely responsible for
its acts and for the acts of Consultant' s agents, employees,
representatives and sub-contractors during the performance of this
Agreement. The City may, during the term of this Agreement, engage
other independent contractors to perform the same or similar work
that Consultant performs hereunder.
IV. Duration of Work
The City and Consultant agree that work will begin on the tasks
described in Exhibit A immediately upon execution of this
Agreement. The parties agree that the work described in Exhibit A
is to be completed within one hundred-twenty (120) calendar days of
the execution of this Agreement; provided however, that additional
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time shall be granted by the City for excusable delays or extra
work, as described in Section VI. (D) below.
V. Phase of Work
The Consultant shall perform the work authorized under this
Agreement at its offices in Seattle, Washington. Meetings with the
City staff as described in Exhibit A, Scope of Work, shall take
place at the City's offices at 400 West Gowe, Kent, Washington, or
at locations mutually agreed upon by the parties.
VI. Termination
A. Termination of Agreement
If the City receives reimbursement by any federal, state,
or other source for work described in Section I herein,
and that funding is withdrawn, reduced or limited in any
way, or the project is cancelled or substantially reduced
after the execution date of this Agreement and prior to
the completion of the work hereunder, the City may
summarily terminate this Agreement. Termination shall be
effective ten calendar days after Consultant' s receipt of
the written notice by certified mail .
B. Termination for Failure to Provide Services Bargained
For.
The Consultant agrees that GAIA Northwest, Inc. was hired
by the City based on the Consultant's representation that
employees identified in the proposal, attached hereto as
Exhibit B, will be available to perform the services
described in Section I for the duration of this
Agreement. If any of the employees identified inthe
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proposal are unvailable to perform the services bargained
for, for any reason, the City of Kent reserves the right
to terminate this contract or renegotiate the amount of
consideration. The consultant must immediately notify
the City, in writing, if any employee identified in the
proposal is unavailable to perform the services described
in Section I of this Agreement. Nothing in the foregoing
language will alter the Consultant's independent-
contractor status.
C. Termination for Failure to Prosecute Work or to Complete
Work Satisfactorily
If the Consultant refuses or fails to prosecute the work
with such diligence as will ensure its completion within
the time frames specified herein, or as modified or
extended as provided in this Agreement, or to complete
such work in a manner satisfactory to the City, then the
City may, by written notice to the Consultant, give
notice of its intention to terminate the Consultant's
right to proceed with the work. On such notice, the
Consultant shall have ten (10) calendar days to cure, to
the satisfaction of the City or its representative, or
the City shall send the Consultant a written termination
letter which shall be effective upon the Consultant's
receipt of the written notice by certified mail. Upon
termination, the City may take over the work and
prosecute the same to completion, by contract or
otherwise, and Consultant shall be liable to the City for
any additional costs incurred by it in the completion of
the Scope of Work referenced as Exhibit A and as modified
or amended prior to termination. "Additional Costs"
shall mean all reasonable costs incurred by the City
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beyond the maximum contract price specified in II (A)
above.
D. Excusable Delays
The right of Consultant to proceed shall not be
terminated nor shall Consultant be charged with
liquidated damages for any delays in the completion of
the work due to: 1) any acts of the federal government
in controlling, restricting, or requisitioning materials,
equipment, tools, or labor by reason of war, national
defense, or other national emergency; 2) any acts of the
City, its consultants, or other public agencies causing
such delay; and 3) causes not reasonably foreseeable by
the parties at the time of the execution of the Agreement
that are beyond the control and without the fault or
negligence of the Consultant, including, but not
restricted to, acts of God, fires, floods, strikes, or
weather of unusual severity; and (4) negotiated and
executed supplemental agreements between the City and
Consultant for Consultant to perform extra work defined
as tasks not included in the Scope of Work referenced as
Exhibit A. PROVIDED, HOWEVER, that the Consultant must
promptly notify the City within ten (10) calendar days in
writing of the cause of the delay. If, on the basis of
the facts and the terms of this Agreement, the delay is
properly excusable, the City shall, in writing, extend
the time for completing the work for a period of time
commensurate with the period of excusable delay.
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E. Rights Upon Termination
In the event of termination, the City shall pay for all
services performed by the Consultant to the effective
date of termination, as described on a final invoice
submitted to the City. After termination, the City may
take possession of all records and data within the
Consultant' s possession pertaining to this project which
may be used by the City without restriction. Any such
use not related to the project which Consultant was
contracted to perform shall be without liability or legal
exposure to the Consultant.
VII. Discrimination
In the hiring of employees for the performance of work under this
Agreement or any sub-contract hereunder, the Consultant, its sub-
contractors, or any person acting on behalf of such Consultant or
sub-contractor shall not, by reason of race, religion, color, sex,
national origin, or the presence of any sensory, mental, or
physical handicap, discriminate against any person who is qualified
and available to perform the work to which the employment relates.
VIII. Indemnification
Consultant shall defend, indemnify and hold the City, its officers,
officials, employees, agents and volunteers harmless from any and
all claims, injuries, damages, losses or suits, including all legal
costs and attorney fees, arising out of or in connection with the
performance of this Agreement, except for injuries and damages
caused by the sole negligence of the City.
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The City's inspection or acceptance of any of Consultant' s work
when completed shall not be grounds to avoid any of these covenants
of indemnification.
Should a court of competent jurisdiction determine that this
Agreement is subject to RCW 4 .24 . 115, then, in the event of
liability for damages arising out of bodily injury to persons or
damages to property caused by or resulting from the concurrent
negligence of the Consultant and the City, its officers, officials,
employees, agents and volunteers, the Consultant's liability
hereunder shall be only to the extent of the Consultant' s
negligence.
The provisions of this section shall survive the expiration or
termination of this Agreement.
IX. Insurance
The Consultant shall procure and maintain for the duration of the
Agreement, insurance against claims for injuries to persons or
damage to property which may arise from or in connection with the
performance of the work hereunder by the Consultant, its agents,
representatives, employees, sub-consultants or sub-contractors.
Before beginning work on the project described in this Agreement,
the Consultant shall provide a Certificate of Insurance evidencing:
1. Automobile Liability insurance with limits no less than
$1, 000, 000 combined single limit per accident for bodily injury and
property damage; and
2 . Commercial General Liability insurance written on an occurrence
basis with limits no less than $1, 000, 000 combined single limit per
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occurrence and $2 , 000, 000 aggregate for personal injury, bodily
injury and property damage. Coverage shall include but not be
limited to: blanket contractual; products/completed
operations/broad form property damage; explosion, collapse and
underground (XCU) if applicable; and employer's liability; and
3 . Professional Liability insurance with limits no less than
$1, 000, 000 limit per occurrence.
Any payment of deductible or self insured retention shall be the
sole responsibility of the Consultant.
The City shall be named as an additional insured on the Commercial
General Liability insurance policy, as respects work performed by
or on behalf of the Consultant and a copy of the endorsement naming
the City as additional insured shall be attached to the Certificate
of Insurance. The City reserves the right to receive a certified
copy of all the required insurance policies.
The Consultant's Commercial General Liability insurance shall
contain a clause stating that coverage shall apply separately to
each insured against whom claim is made or suit is brought, except
with respects to the limits of the insurer' s liability.
The Consultant' s insurance shall be primary insurance as respects
the City and the City shall be given thirty (30) days prior written
notice by certified mail, return receipt requested, of any
cancellation, suspension or material change in coverage.
X. Exchange of Information
The City warrants the accuracy of any information supplied by it to
Consultant for the purpose of completion of the work under this
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Agreement. The parties agree that the Consultant will notify the
City of any inaccuracies in the information provided by the City as
may be discovered in the process of performing the work, and that
the City is entitled to rely upon any information supplied by the
Consultant which results as a product of this Agreement.
XI. Ownership of Records and Documents
Original documents, drawings, designs and reports developed under
this Agreement shall belong to and become the property of the City.
All written information submitted by the City to the Consultant in
connection with the services performed by the Consultant under this
Agreement will be safeguarded by the Consultant to at least the
same extent as the Consultant safeguards like information relating
to its own business. If such information is publicly available is
already in Consultant's possession or known to it, or is rightfully
obtained by the Consultant from third parties, Consultant shall
bear no responsibility for its disclosure, inadvertent or
otherwise.
All data, documents and files created by Consultant under this
Agreement may be stored at Consultant's office in Seattle,
Washington. Consultant shall make such date, documents, and files
available to the City upon its request at all reasonable times for
the purpose of editing, modifying and updating as necessary until
such time as the City is capable of storing such information in the
City's offices. Duplicate copies of this information shall be
provided to the City upon its request, and at reasonable cost.
XII. Recyclable Materials
Pursuant to City of Kent Ordinance No. 3066, The City of Kent
requires its contractors and consultants to use recycled and
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recyclable products whenever practicable. A price preference may
be available for any designated recycled product.
XIII. Entire Agreement
The written provisions and terms of this Agreement, together with
any Exhibits attached hereto, shall supersede all prior verbal
statements of any officer or other representative of the City,
and such statements shall not be effective or be construed as
entering into or forming a part of or altering in any manner
whatsoever, this Agreement or the Agreement documents. The entire
agreement between the parties with respect to the subject matter
hereunder is contained in this Agreement and any Exhibits attached
hereto, which may or may not have been executed prior to the
execution of this Agreement. All of the above documents are hereby
made a part of this Agreement and form the Agreement document as
fully as if the same were set forth herein.
XIV. City's Right of Inspection
Even though Consultant is an independent contractor with the
authority to control and direct the performance and details of the
work authorized under this Agreement, the work must meet the
approval of the City and shall be subject to the City's general
right of inspection to secure the satisfactory completion thereof.
The Consultant agrees to comply with all federal, state, and
municipal laws, rules, and regulations that are now effective or in
the future become applicable to Consultant's business, equipment,
and personnel engaged in operations covered by this Agreement or
accruing out of the performance of such operations.
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XV. Consultant to Maintain Records to Support Independent
Contractor Status
On the effective date of this Agreement (or shortly thereafter) ,
Consultant shall:
A. File a schedule of expenses with the Internal Revenue
Service for the type of business Consultant conducts;
B. Establish an account with the Washington State Department
of Revenue and other necessary state agencies for the
payment of all state taxes normally paid by employers,
register to receive a unified business identifier number
from the State of Washington; and
C. Maintain a separate set of books and records that reflect
all items of income and expenses of Consultant's
business, all as described in the Revised Code of
Washington (RCW) Section 51. 08. 195, as required to show
that the services performed by Consultant under this
Agreement shall not give rise to an employer-employee
relationship between the parties which is subject to RCW
Title 51, Industrial Insurance.
XVI. Work Performed at Consultant' s Risk
Consultant shall take all precautions necessary and shall be
responsible for the safety of its employees, agents, and
subcontractors in the performance of the work hereunder and shall
utilize all protection necessary for that purpose. All work shall
be done at Consultant's own risk, and Consultant shall be
responsible for any loss of or damage to materials, tools, or other
articles used or held for use in connection with the work.
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XVII. Modification
No waiver, alteration, or modification of any of the provisions of
this Agreement shall be binding unless in writing and signed by a
duly authorized representative of the City and Consultant.
XVIII. Assignment
Any assignment of this Agreement by the Consultant without the
written consent of the City shall be void. If the City shall give
its consent to any assignment, this paragraph shall continue in
full force and effect and no further assignment shall be made
without the City' s consent.
XIV. Written Notice
All communications regarding this Agreement shall be sent to the
parties at the addresses listed on the signature page of the
agreement, unless notified to the contrary. Any written notice
hereunder shall become effective upon the date of mailing by
registered or certified mail, and shall be deemed sufficiently
given if sent to the addressee at the address stated in this
Agreement or such other address as may be
hereafter specified in writing.
XX. Governing Law
This Agreement shall be governed by the laws of the State of
Washington.
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XXI. Non-Waiver of Breach
The failure of the City to insist upon strict performance of any of
the covenants and agreements contained herein, or to exercise any
option herein conferred in one or more instances shall not be
construed to be a waiver or relinquishment of said covenants,
agreements, or options, and the same shall be and remain in full
force and effect.
XXII. Resolution of Disputes
Should any dispute, misunderstanding, or conflict arise as to the
terms and conditions contained in this Agreement, the matter shall
first be referred to the City, and the City shall determine the
term or provision's true intent or meaning. The City shall also
decide all questions which may arise between the parties relative
to the actual services provided or to the sufficiency of the
performance hereunder.
If any dispute arises between the City and Consultant under any of
the provisions of this Agreement which cannot be resolved by the
City's determination in a reasonable time, or if Consultant does
not agree with the City's decision on the disputed matter,
jurisdiction of any resulting litigation shall be filed in King
County Superior Court, King County, Washington. This Agreement
shall be governed by and construed in accordance with the laws of
the State of Washington. Each party shall be solely responsible
for its costs, expenses and reasonable attorney's fees incurred in
any litigation arising out of the enforcement of this Agreement.
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IN WITNESS WHEREOF, the parties have executed this Agreement on the
day and year first above written.
' THE CITY OF KENT
BY. � BY ,1,�"nv
Its Princi al DirecLPublic Works
BY: '�
ayor
Notices to be sent to:
Mr. Don Wickstrom, P.E.
CONSULTANT Director of Public Works
The City of Kent
220 Fourth Avenue South
Kent, Washington 98032
APPRO
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EXHIBIT A
CITY OF KENT
MILL CREEK CANYON
STREAM STABILIZATION/BIOENGINEERING PROJECT
SCOPE OF WORK
GENERAL PROJECT DESCRIPTION
The -City of Kent (City) constructed the Upper Mill Creek Stormwater Detention Facility
(Detention Facility) in 1989 to control stormwater runoff from the Mill Creek Drainage Basin.
Severe erosion is occurring on Mill Creek between the Detention Facility and the upper end.of
Earthworks Park. The erosion that is occurring has eliminated stream habitat that is essential
to a "properly functioning stream."
For this project, GAIA Northwest, Incorporated (GAIA) will be joined by Hough Beck & Baird
and GeoEngineers. Hough Beck & Baird will be responsible for assessment and selection of
riparian vegetation. GeoEngineers will perform geotechnical services. GAIA will conduct this
project in three phases:
• Phase I evaluates existing conditions of eight candidate construction sites.
Preliminary layouts of work at each site will be completed. The City will provide
topographic mapping of the eight sites. The City will be responsible for the
permitting process.
• In Phase Il, designs for up to eight candidate sites will be prepared and the
plan and profile for the streambed control plan will be finalized. The first
priority sites and the demonstration projects listed in the Mill Creek Erosion
Control Project, Final Project Report (Parametrix, 1992) will be the number one
priorities.
• In Phase III, the design elements will be constructed in the stream. The design
drawings and specifications will be used to guide the construction process in the
field.
It is anticipated that site plans for the design of up to eight sites will be prepared. A bid
package that will be suitable for bidding and administrating an outside contractor(s) will be
prepared. The bid package will include procurement and transporting the necessary materials
needed to complete the work to the points of use in the canyon.
In general, streambed stabilization for the entire reach between the Detention Facility and Earth
Works Park is expected to require additional construction projects and several years to complete.
Phase I will be conducted quickly to obtain information about the existing conditions. It is
anticipated that the sketches prepared during this phase will be used as the basis for the design
package documents. The design phase (Phase II) will include preparation of drawings, contract
documents, specifications, and field locating the streambed/bank improvements.
(Unless indicated otherwise all task work items will be performed by the GAIA team.)
PHASE I HYDRAULIC ASSESSMENT OF PROJECT SITES
This phase of the project will develop information that will assist in characterizing the locations
and causes of habitat and stream degradation at the project sites. The assessment will include
three tasks:
Project Management for all phases
• Geotechnical
• Initial Evaluation
The City will prepare topographic mapping of the eight sites in Mill Creek Canyon. This
mapping will be prepared as a strip map at a 50 scale with 5-foot contour intervals. In addition,
for a distance of 200 feet upstream and 200 feet downstream of each site, the City will provide
a profile of the stream bottom along the low flow centerline at a scale of 1-inch to 50-foot
horizontal to 1-inch to 5-foot vertical. All mapping will be prepared on sheets not to exceed 22
by 34 inches. The scale of the sheets is important to allow inexpensive reproduction at 11 by
17 inches. No field assessment work will begin until the mapping is available. The City agrees
to begin this mapping effort early in the project so that the mapping is available for the Phase
I work.
Task 1.0 - Project Management
The Senior Project Manager will set up the project tracking and billing system; prepare the
project memorandum setting forth the task assignments for all team members, project schedule,
and deliverables; and manage all contractual elements of the project.
Task 1.1 Geotechnical Assessment
This task consists of a site reconnaissance to catalogue the geologic conditions at the eight
project sites in Mill Creek Canyon.
We will review the available data pertaining to the geologic and geotechnical aspects of the site
and vicinity. We anticipate that we will review geologic maps, existing geologic and
geotechnical reports, U.S. Soil Conservation Service soil survey neaps for King County, Federal
Emergency Management Agency (FEMA) flood maps, and other data.
We will perform a site reconnaissance of the stream banks. We will observe and describe the
geologic conditions, catalogue the stream bank and landslide features connected with stream
erosion, and assess equipment access for construction repairs. We will develop conceptual
recommendations showing each of the candidate sites in a drawing for repair of the unstable
stream bank areas to protect them from further erosion.
We will document our findings in a letter report and include appropriate supporting data. Any
sketches included in the letter report will be drawn freehand.
Task 1.2 - Initial Evaluation of Field Assessment Data
GAIA staff members will assess the eight sites and field locate the proposed improvements. The
project team will meet in-stream to develop proposed improvements in Mill Creek Canyon. On
site discussions between all project team members will be used to adjust the initial layout of the
recommended improvements. A drawing set will be used to record the consensus of the project
team.
The output from this task will be a letter report and the production of the preliminary design
layout drawings that will be used in Phase 1I, Design of Stream Improvements. A set of the
topographic drawings will be marked with the improvements that will be constructed.
Items not included in this scope of work include:
• Any Shoreline Permit applications
• Water quality sampling
• SEPA permits
• HPA submission and approval
Deliverables:
• Letter Report
• Sketches of proposed improvements on City-supplied mapping
PHASE II DESIGN OF STREAM IMPROVEMENTS
Task 2.1 - Design of Stream Improvements
This task consists of completing the design elements developed in Phase 1. The design drawings
will consist of a cover drawing, site plans for each of the eight sites (two sheets, total), two plan
sheets (1 " = 200', supplied by the City) of the canyon to identify the location of the eight sites,
and one sheet of standard details.
Several specification sections will be written describing the materials that will be incorporated
into the construction of the improvements. These specification sections can be used in the
ss used to' purchase and deliver material to the Mill Creek Canyon
competitive bid .process
rehabilitation sites. We anticipate that the construction contract will be divided into two
schedules. The first schedule will include priority sites that are desirable to complete in 1993.
The second schedule will include the remaining sites that will .be completed in 19.93 if time
permits, but will be completed in 1994 if it is necessary to stop construction.
The Consultant will provide 30 copies of specifications and drawings for bidding: We will assist
the City in advertising for and obtaining bids, attend prebid conferences, answer questions from
prospective bidders and issue addenda. We will assist the City in determining qualifications of
prospective contractors and subcontractors. We will attend the bid opening, prepare bid
tabulation sheets, and provide assistance to the City in evaluating bids.
Deliverables:
• Disk of Specifications
• Mylars of Final Plans
PHASE Ill - CONSTRUCTION
Task 3.1 - Construction Initiation
This task consists of meeting with the construction crews to brief them on the project and
explain how the construction will be performed. This briefing will be conducted by the Project
Manager alone.
Task 3.2 - Construction Assistance
This task consists of site visits or telephone support by the project team as appropriate to answer
field questions by the construction crews. Because the improvements will .be constructed from
materials of non-standard dimensions, we expect that there will initially be questions from the
construction crews, but that the questions will probably diminish as the crews gain experience
constructing the improvements.
It is anticipated that construction at each candidate site will last an average of approximately
three days. Site visits will be designed to be coincident with the end of construction at one site
and the beginning of construction at another site. Additional site visits will occur at a rate of
one visit in the middle of construction at each site.
Deliverables:
• One set of reproducible "record drawings"
SCHEDULE
We will commence work upon receipt of an executed contract. The work will be executed in
accordance with Attachment A. Attachment A is a schedule that was previously submitted to
the City. This requirements of this contract will be considered fulfilled upon substantial
completion or acceptance.of the project by the City.
PAYMENT FOR PROFESSIONAL SERVICES
Attachment B is the estimate of hours and costs by phase of the project.
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APPENDIX B
STATEMENT OF QUALIFICATIONS
GAIA NORTHWEST, INC.
THE FIRM
Gaia Northwest, Inc. (GAIA) is a natural resources consulting firm with offices in Seattle,
Washington. GAIA offers the services of experts in a wide variety of applied science
disciplines, with emphases on fisheries ecology, water resources engineering, water quality, and
oceanography/limnology. GAIA provides a complete range of services, including policy,
planning documents; and reports; preliminary and final design drawings and specifications; and
construction phase engineering. To address unique client problems, past work has included
preparation of experimental design. Founded in 1983, GAIA has established a reputation among
peers and clients for objective, quality work.
The professional staff of GAIA includes two professionals with more than 25 years of
experience. Dr. Percy M. Washington's experience is in natural resource consulting, program
management, planning, and research. Douglas T. Sovern's experience is in water resources and
water systems engineering, including sedimentation and erosion, stormwater runoff, and water
and sewer systems.
Our projects require staff involvements that range from one professional to several staff
members and supporting consultants. Teams of professionals are assembled that are suited to
the needs of the projects, which is central to GAIA's approach. GAIA works with the client to
assure that each facet of a project is individually considered, to assure a common understanding
of the goals for the project; and to provide the client with the highest quality and most effective
services.
GAIA is a local, minority owned and managed firm committed to increasing opportunities
available to minority and women scientists and engineers in the natural resource fields.
Ownership of GAIA and will remain in the hands of minority members.
STREAM REHABILITATION
APPROACH
Dr. Washington and Mr. Sovern developed a maintenance approach to stream rehabilitation for
Piper's Creek in the City of Seattle. This approach is suitable for use on most smaller streams
around the Seattle region. A maintenance approach can be described as the use of human
resources, tools, and materials that are commonly available to maintenance crews or that may
be available in the environment of the streams. This approach can be accomplished by regular
maintenance crews or adapted for normal bidding processes for construction by independent
contractors.
The maintenance approach builds or rebuilds fish habitat that is capable of resisting most of the
hydraulic forces of stormwater runoff. .Segments of streams will be designed to be rebuilt so
that low-flow channels have longer lengths and the channel as a whole has increased roughness
for High flows.
The basic concept includes several components:
• Vertical control of the.channel bottom
• Bank protection at the outside of bends
• Meandering low flow pattern
• Formation of pools
• Low flows forced into a repeatable path after each storm event.
The City of Kent (City) can undertake a maintenance approach in one of two methods:
• Long Term - Complete the work over several years with a series of linked
projects
• Discrete Projects - Isolated projects that will become the base for subsequent
work in the reach above each in-stream project.
In either case, the GAIA team will conduct an in-stream analysis to layout the proposed work,
which will be coordinated with the City and with the Washington Department of Fisheries
(WDF). Subsequent stream improvements will be laid out on contour mapping to develop design
drawings. Depending on the implementation approach, specifications and bid documents will
be prepared. Details of rehabilitation components will be developed and included with the
design drawings.
The maintenance approach uses materials with minimally controlled dimensions and facilities that
require dimensional adjustment in the field. GAIA will provide construction phase engineering
services to provide for field adjustment during installation of the stream rehabilitation
improvements.
GAIA will be assisted on stream rehabilitation projects by Hough Beck & Baird and by
GeoEngineers. Hough Beck & Baird will be responsible for riparian plantings and trails.
GeoEngineers will provide geotechnical engineering services.
PERSONNEL
The GAIA staff members assigned to work on stream rehabilitation projects will be selected for
the type of work that will be required. Short descriptions for four professionals are included:
• Douglas T. Sovern, Project Manager/Engineer
• Percy M. Washington, Ph.D., Fish Ecologist
• David W. Dugas, Invertebrate Ecology
Ann M. Koziol, Aquaculture/Fisheries Chemistry
Douglas T. Sovern. Mr.-Sovern has over 27 years of experience in planning, design, and
construction of engineering projects, specializing in streams, stormwater, and sewer/water
systems. Mr. Sovern and Mr. Washington collaborated to develop the maintenance approach
to stream rehabilitation being proposed for projects for the City. Mr. Sovern's stream
construction experience includes projects in streams with capacities ranging in size from a few
cubic feet per second (cfs) to over 100,000 cfs.
Perev M Washin on, Jr., Ph.D.. With over 25 years experience in fish ecology that ranges
from simple investigations to exotic approaches to protecting fish from the effects of underwater
explosives, Dr. Washington provides a wide range of theoretical and practical design skills to
stream rehabilitation projects. His approach to stream projects has evolved from development
of the combined benefits of healthy flora and fauna systems in the basin to build a food base.
Using this philosophy, Dr. Washington has successfully reestablished fish populations in western
Washington.
David W. Dugas. A major concern of fish habitat is the available food for top predators, such
as resident and anadramous fish. Mr. Dugas has 20 years experience in this important aspect
stream rehabilitation, including collection and analysis of benthic macroinvertebrates and
substrate types in freshwater and saltwater environments.
Ann M. Koziol. Among the obstacles that fish populations in urban streams face are pollutants
in stormwater. Ms. Koziol has more than 14 years experience investigating the levels of
elements and chemicals in fish populations. Her work has been conducted in both freshwater
and marine fisheries in the United States and Japan.
PROJECTS
Seattle Engineering Department/Drainage and Wastewater Utility. Developed maintenance
approach to stream rehabilitation on a one mile segment of Piper's Creek in Carkeek Park.
Approach utilized readily available materials and maintenance crews to reconstruct habitat in
portions of the reach. Fish populations increased 800 percent in one season. (Douglas Sovern
while with another firm and GAIA as a subcontractor)
Seattle City Light/Environmental Affairs Division. As subconsultant to Jones and Stokes
Associates, developed computer models that estimate the numbers of salmonid eggs, ale.vin,,or
fry at any time of the year, and a'spawner temporal distribution model.
City of Tacoma, Department of Power and Light. Provided fishery, engineering, and
economic consultations services.
Adams County/Urban Drainage and Flood Control District, Colorado. Designed bridge and
rehabilitation of diversion structure on Clear Creek. Project involved new bridge, low flow
channelization of the Creek (3,000 cfs), and rehabilitation of 25-foot drop on Clear Creek. 100-
year design capacity of 21,000 cfs. (Douglas Sovern while with another firm)
Bullhead City, Arizona. Sedimentation and erosion study of Big Montana Wash for Bullhead
City Arizona. Investigation required field testing of streambed characteristics and estimation of
annual sediment loadings generated from Big Montana Wash. (Douglas Sovern while with
another firm)
Superior Metropolitan District. Design of channel to pass increased flows from new
subdivision. Work included low flow diversion structures to maintain existing wetlands and to
enhance and protect fish habitat. (Douglas Sovern while with another firm)
Municipality of Metropolitan Seattle. Provided aquatic ecology consultation for Carkeek Park
value engineering project as subcontractor to Kramer Chin and Mayo. Subsequently engaged
by Dees and Associates to provide aquatic ecology consultations for the Seattle Parks
Department for the stream rehabilitation project for Piper's Creek.
Save Our Salmon. Provided fishery ecology consultations that were designed to result in the
restoration of wild coho salmon runs in the currently under-utilized Dewatto River in
Kitsap/Mason Counties.
REFERENCES
Mr. Richard Gustav Mr. Robert Matsuda
Seattle Engineering Department Metro
Drainage and Wastewater Utility Exchange Building
660 Dexter Horton Building 82 Second Avenue
710 Second Avenue Seattle, Washington 98104
Seattle, Washington 98104 (206) 447-6744
(206) 684-7591
Mr. Jon Ives Dr. Gary Minton, P.E.
Jones & Stokes Associates Resource Planning Association
1802 136th Place N.E. 113 Lynn Street
Bellevue, Washington 98005 Seattle, Washington 98109
(206) 641-3982 (206) 282-1681