HomeMy WebLinkAboutPort Hadlock Sewer Final Design AR Department of Public Works
O Consent Agenda
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Jefferson County
Board of Commissioners
Agenda Request
To: Board of Commissioners
Mark McCauley, County Administrator
From: Monte Reinders, Public Works Director/County Engineer
Agenda Date: October 16, 2023
Subject: Supplement #7 - Contract with Tetra Tech, Inc.
Final Design - Port Hadlock Sewer Collections and Modification to
Final Design for the Treatment Plant
Statement of Issue: The original contract with the County's sewer design consultant Tetra
Tech, Inc. included final design and specifications for the Wastewater Treatment Plant
(WWTP) and pressurized sewer collection system for the Core Area (Phase 1). Supplement #7
adds scope and budget to complete the final plans and specifications for the low pressure
sewer collection system and for changes made to the WWTP plans through the final design
review process.
Analysis/Strategic Goals/Pro's Et Con's: This Supplement will complete the Plans and
Specifications needed to go to advertisement this October for the WWTP and this November
for the low-pressure sewer (LPS) collections. The following Scope of Work (SOW) has been
added to the original contract as described in Exhibit A-1: revise layout for equalization tank
and the influent pump station; incorporate final design comments; additional engineering
review for Ovivo change order; and final design for the LPS collection plans and specification.
This SOW was not included in the original contract due to budget limitations and unknown
elements at the time of original contract.
Fiscal Impact/Cost Benefit Analysis: The additional budget for this supplement is
$294,932.00 as detailed in Exhibit B to the Supplement. 100-percent of the cost is covered by
County ARPA funds.
Recommendation: Please sign Supplement #7 were indicated and return executed originals
to Public Works for further processing.
Department Contact: Samantha Harper, (360) 385-9175
Reviewe By:
X C,
Mark McCaule , ounty Administrator Da e