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HomeMy WebLinkAboutAddendum - 1AMENDMENT NO. 1 TO AGREEMENT FOR LIND AVE SW STORM
SYSTEM IMPROVEMENT PROJECT
THIS AMENDMENT, dated for reference purposes only as March 21, 2025, is by and between
WSP USA Inc.
A New York corporation. The City and the Consultant are referred to collectively
in this Amendment Amendment is
effective as of the last date signed by both parties.
Whereas, the City engaged the services of the Consultant under Agreement CAG-24-023, dated
November 29, 2023, to provide necessary services for the Lind Ave SW Storm System
Improvement Project
Whereas, the Parties wish to amend the Agreement to change the scope of work, change the
time for performance, and change the compensation in order to design water quality treatment
retrofits.
NOW THEREFORE, It is mutually agreed upon that CAG-24-023 is amended as follows:
1. Scope of Work: Section 1, Scope of Work, is amended to add work as specified in Exhibit
A-1, which is attached and incorporated herein.
2.Time of Performance:Section 3, Time of Performance, is amended pursuant to the
schedule(s) set forth in Exhibit B-1. All Work shall be performed by no later than June 30,
2026.
3. Compensation: Section 4, Compensation, is amended so that the maximum amount of
compensation payable to Consultant is increased by $349,657 from $549,954 to
$899,611, plus any applicable state and local sales taxes. The additional compensation
shall be paid based upon Work actually performed according to the rate(s) or amounts
specified in Exhibit C-1,which is attached and incorporated herein.
4.All terms of the Agreement not explicitly modified herein shall remain in full force and
effect and such terms shall apply to Work performed according to this Amendment as if
fully set forth herein.
IN WITNESS WHEREOF, the Parties have voluntarily entered into this Amendment as of the date
last signed by the Parties below.
CAG-24-023, Adden #1-25
PAGE 2 OF 2
CITY OF RENTON
By:_____________________________
CONSULTANT
By:____________________________
Armondo Pavone
Mayor, City of Renton
Ginette Lalonde
Senior Director, Seattle Water
_____________________________
Date
_____________________________
Date
Attest
_____________________________
Jason A. Seth
City Clerk
Approved as to Legal Form
By: __________________________
Cheryl Beyer
Renton City Attorney
Contract Template Updated 06/17/2021
By:____________________________By:____________________________
4/30/2025
Approved by Cheryl Beyer via email 3/21/2025
Task 50 - Assumptions
The project duration is anticipated to be from approximately December 2024 through June 2026.
If the project schedule is extended, it could result in additional project management effort.
All coordination with Ecology will be through the City (applies to all tasks).
Task 50 - Deliverables
Project correspondence as needed.
Monthly Progress Reports.
Up to twenty 30 minute monthly status calls
The City received a water quality retrofit grant to provide enhanced treatment along the project corridor
where conveyance improvements are proposed (currently planned from the intersection of SW 43rd St and
Lind Ave SW, north along Lind Ave SW to SW 39th Street and then west along SW 39th Street to outfall at
Springbrook Creek). This alignment is preliminary and may be subject to change. This task will include
the development of a Water Quality Retrofit Design Report for review by the City and Ecology. The report
will include the following elements:
- Review and identify potential locations for treatment BMPs and assess their feasibility (e.g., BMPs
to be likely located around existing inlets and will need to consider available space (within ROW),
sidewalk restoration, potential ADA compliance, maintenance access, and utility conflicts). This
work will also include inlet spacing analysis calculations to ensure that when the new treatment
units are located, they will meet City standards.
- Review and selection of type of treatment BMP system (e.g., consider most appropriate BMP
systems modular
wetland, Filterra, EcoStorm Plus, BioPod or other City requested treatment type BMPs).
Depending on the individual site constraints, different type BMP systems may be recommended for
different locations. Treatment options will be evaluated based on factors such as existing
infrastructure, landscape integration, utility conflicts, spatial constraints, cost, and maintenance
requirements.
- Identification of potential utility conflicts and need for additional potholing. The existing survey
base map will be the basis for the stormwater quality pre-design. Additional survey needs, including
potholing, will also be identified as part of the pre-design work. Consultant will assess whether
planned potholes for the proposed trunkline can also be used to provide data for WQ treatment
BMPs. Any potholes required will be completed under the Task 54 Allowance Supplemental
Surveying and Potholing.
- Preliminary sizing that includes a simple hydrologic model (using WWHM or MGSFlood software)
to estimate water quality treatment and bypass flow rates. Sizing and analysis will follow sizing
requirements as set forth in the 2019 Surface Water Management Manual for Western Washington
(2019 SWMMM) to provide enhanced treatment of the individual catchment areas.
- Sizing of the treatment units.
- Preliminary plan and profile for each proposed BMP.
- Assessing roadway restoration that may be required (e.g., sidewalk reconstruction, ADA
compliance, curb replacement, landscape restoration/irrigation, pipe installation for downstream
connection, and utility conflicts).
- Estimating the construction cost of the water quality retrofits.
Task 52 - Deliverables
City Draft Preliminary Water Quality Retrofit Design Report (PDF and Word)
Ecology Draft Preliminary Water Quality Retrofit Design Report (PDF and Word) Including
properly calculated preliminary equivalent new/re-development area.
Preliminary project GIS shapefile of planned areas that would receive treatment (in Ecology
requested format)
Task 52 - Assumptions
Any survey or potholes required will be done under the Allowance Task.
Consultant will attempt to collect and treat as much roadway area as possible along the alignment
recognizing that some areas will not be feasible.
City prefers stormwater BMP types that do not require vegetation maintenance.
City to provide input on policy for replacing ramps when needed to meet ADA compliance.
The Final Water Quality Retrofit Design Report will be completed at the 90% design submittal.
Deliverables Guidance document
Task 53 - Deliverables
Draft Responses to Ecology Comments on Draft Report for City Review
Responses to Ecology Comments for submittal to Ecology
Task 55 - Deliverables
60% Plan Set
60% Special Provisions
60% Cost Estimate and Bid Schedule
Task 55 - Assumptions
Drawing list is preliminary and may be revised based on recommended improvements during the
work of Task 52. It is assumed that private utilities will be responsible for relocating their facilities
coordinate with these utilities.
It is assumed the City will send the 60% plans to affected private utilities with request for relocation
planning. It is assumed that the City will take the lead in coordinating the effort with the utility
companies.
The City will be responsible for printing and reproduction, if any needed.
The City will perform any coordination required with property owners.
Construction and permanent easements, if needed, shall be prepared and obtained by the City.
It is assumed that the traffic control plans for individual retrofit BMPs will not be needed and that
the overall traffic control plan for the storm trunk line can be annotated with notes and specifications
to describe supplemental traffic control for BMP unit construction.
A specific dewatering plan will not be included. Criteria for dewatering will be provided in the
specifications based upon the geotechnical report. The Contractor will be responsible for
developing a detailed dewatering plan.
No temporary or permanent irrigation is assumed to be needed.
Roadway pavement marking restoration will be specified to match existing. It is assumed design
of pavement restoration marking is not required.
The design budget assumes up to a total of four (4) new ADA ramps will be required where
intersection quadrants are disturbed (e.g., where curb/gutter and sidewalks are disturbed with new
catch basins in an intersection quadrant for the water quality retrofit). It is assumed that no work
associated with electrical signals/push button pedestals, (e.g., crosswalk signal, power for lighting,
or grading (beyond replaced sidewalk panels and new ramp) will be required.
Task 56- Deliverables
90% Plan Set
90% Project Manual (PDF and Word)
90% Cost Estimate and Bid Schedule
Task 56 - Assumptions
Task 58 - Deliverables
Final Design Report
Task 58 - Assumptions
Task 59 - Deliverables
Responses to Ecology 90% Comments for City Review
Responses to Ecology 90% Comments for Ecology Review
Task 59 - Assumptions
Task 60 - Deliverables
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