HomeMy WebLinkAboutAddendum - 3Docusign Envelope ID: 883F7 405-34D3-49E0-8201-A80A0BF17FDB
AMENDMENT NO. 3 TO AGREEMENT FOR FINAL DESIGN OF THE
SE 172ND ST & 125TH AVE SE GREEN STORMWATER
INFRASTRUCTURE PROJECT
THIS AMENDMENT, dated for reference purposes only as December 1, 2024, is by and between
the City of Renton (the "City"), a Washington municipal corporation, and Osborn Consulting, Inc.
("Consultant"), a Washington corporation. The City and the Consultant are referred to collectively
in this Amendment as the "Parties." Once fully executed by the Parties, this Amendment is
effective as of the last date signed by both parties.
Whereas, the City engaged the services of the Consultant under Agreement CAG-23-082, dated
February 1, 2023, to provide necessary services for the Final Design of the SE 172nd St & 125th Ave
SE Green Stormwater Infrastructure Project (referred to herein as the "Agreement");
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 prepare the bid-ready plans,
specifications, engineer's estimate, and design report, as well as to provide support during
bidding and construction.
NOW THEREFORE, It is mutually agreed upon that CAG-23-082 is amended as follows:
1.Scope of Work: Section 1, Scope of Work, is amended to add work as specified in Exhibit
A-3, 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-3. All Work shall be performed by no later than
December 31, 2025.
3.Compensation: Section 4, Compensation, is amended so that the maximum amount of
compensation payable to Consultant is increased by $98,731 from $231,583 to $330,314,
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-3,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.
CAG-23-082, Adden #3-24
1/2/2025
Approved by Cheryl Beyer via email 11/21/2024
Docusign Envelope ID: 883F7 405-34D3-49E0-8201-A80A0BF17FDB
EXHIBIT A-3
SCOPE OF WORK
Project Name: SE 172nd St Green Stormwater Infrastructure Project-Phase 2
Amendment 3 -Final Desiqn and Construction Suooort
Client: Citv of Renton
Prime Consultant: Osborn Consultinq, Inc.
Contract Number:
BACKGROUND
The Project will plan and design stormwater system modifications and green stormwater infrastructure
(GSI) to improve water quality and drainage capacity for approximately half a block (600 ft) north of SE
172nd Street for 122nd Ave SE, 123rd Ave SE, 124th Ave SE and 125th Ave SE, and approximately two
blocks (1,400 ft) of SE 172nd Street. This project for the City of Renton (City) will consist of installing a
new stormwater conveyance system and green infrastructure with pervious concrete sidewalks
supplemented with GULD facilities to collect and treat stormwater runoff from approximately 2 acres of
pollution generating impervious surfaces.
The project design and deliverable will meet the requirements of the Washington State Department of
Ecology (Ecology) Water Quality Stormwater Pre-Construction Grant agreement and follow the 2019
Stormwater Management Manual for Western Washington (2019 SWMMWW), and the 2022 City of
Renton Surface Water Design Manual (SWDM) as an amendment to the 2021 King County Surface
Water Design Manual.
This amendment will provide additional design support for the final design of the project to bid-ready
plans, specifications and engineers estimate. This will include coordination with Puget Sound Energy for
resolution of existing gas and utility pole conflicts and coordination with Ecology for the Final Design for
bid documents approval.
The final bid package will include the water and sewer final design elements as a separate bid schedule
that will be compiled through a separate contract with Soos Creek Water and Sewer District. This
amendment also adds support services during bidding and construction for the City's improvements.
The scope of work below covers additional design work assumed to be completed by the end of
December 2024, as well as additional project management and bid and construction support through
December 2025.
SCOPE OF WORK
Task 1 Project Management
Monitoring and communicating the status of the scope, schedule, and budget of this work assignment and
providing monthly reporting to the City through December 2025.
Consultant Services
■Prepare status reports describing the following:
SE 172nd St Green Stormwater Infrastructure Project-Phase 2
Amendment 3 -Final Design and Construction Support
1IPage
Docusign Envelope ID: 883F7 405-34D3-49E0-8201-A80A0BF17FDB
Consultant Services
■ Updates to the Final Design Report will be completed to address City and Ecology comments and
meet the grant submittal requirements.
■ A summary memo of design changes will be compiled to accompany the Final Design Report
submitted to Ecology
■ The construction plans, specifications and cost estimates will be updated to address review
comments.
■ Additional design coordination with Puget Sound Energy to confirm and limit vertical and
horizontal conflicts with existing gas and utility poles.
Client Responsibility
■ City to provide consolidated review comments of the 100% Design submittal by the City and Soos
Creek.
■ Provide updates to the project specifications and updates to Division 1, as needed.
Assumptions
■ The single Cover Sheet, Notes and Abbreviations sheets will used for the final combined
submittal with the Soos Creek improvements included as a separate bid schedule.
■ The project specifications will be based on City special provisions provided by the City with the
100% review comments.
■ Additional updates to the project specifications will be provided by the City, with exception to the
bid schedule summary in Section 10 and the Special Provisions in Section 24.
■ There will only be minor changes to the project design to address review comments of the Bid
Ready submittal.
■ A design report of water and sewer improvements will not be required.
■ Any additional utility potholes will be provided by the utility owners. Survey verification of the
utility locations will not be required.
■ Up to one site visit will be required prior to the final design submittal to verify utility pothole
locations.
■ No roadway or pedestrian improvements will be required south of SE 172nd St along 125th Ave
SE.
Deliverables
■ Final Design Package Submittal (PDF)
-100% Design Review Comment Responses (PDF)
-Bid-Ready Construction Plans, including Soos Creek water and sewer plans (PDF)
-Bid-Ready Special Provisions with Soos Creek specifications (PDF and MS Word document)
-Engineer's Bid-Ready Construction Estimate of Probable Cost (PDF and Excel Spreadsheet)
-Final Ecology Design Report and summary memorandum (PDF)
3IPage
SE 172nd St Green Stormwater Infrastructure Project-Phase 2
Amendment 3 -Final Design and Construction Support