To: Honorable Mayor and Members of Town Council
Through: David L. Corliss, Town Manager
From: Mark Marlowe, P.E., Director of Castle Rock Water
Matt Benak, P.E., Water Resources Manager
Title
Resolution Approving an Intergovernmental Agreement for the Cost Sharing, Construction and Capacity Allocation of a WISE Pump Station at Parker Water & Sanitation District [PWSD’s Rueter-Hess Water Purification Facility in Parker, Colorado]
Body
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Executive Summary
The purpose of this memorandum is to seek Town Council approval of a resolution (Attachment A) for an Intergovernmental Agreement (IGA) with Parker Water & Sanitation District (PWSD), Dominion Water and Sanitation District (DWSD), and South Metro Water Supply Authority (SMWSA) for the cost sharing, construction and capacity allocation of a Water Infrastructure Supply Efficiency (WISE) pump station and associated infrastructure.
One of Castle Rock’s key pieces of our renewable water supply portfolio is water from the WISE project. The WISE Program is a source of renewable and sustainable water supply for ten (10) south metropolitan water providers, including Castle Rock, DWSD and PWSD. In 2015, a 42-inch steel RidgeGate Line (RGL) was designed and constructed to convey WISE water from the primary WISE East-West transmission main to the RGL regional partners. At that time, the associated WISE receiving tank, pump station, and site piping were deferred and the pump station inside PWSD’s existing Rueter-Hess Water Purification Facility (RHWPF) was used to pump WISE water. PWSD is now in need of its own pump station capacity within the RHWPF.
In January 2022, PWSD, Castle Rock and DWSD entered into an IGA for the design of the WISE pump station and infrastructure. HDR was selected as the top respondent with a total design fee of $825,600 (Castle Rock’s portion of the design being $401,372.32). In June 2023, Town Council approved a change order for HDR’s additional design efforts of $228,400 (with Castle Rock’s portion being $123,336). As part of this latest Town Council consideration, HDR is requesting a design change order (additional authorization) for $43,010 (with Castle Rock’s portion being $23,225) to cover additional procurement package submittal reviews, value engineering work, updating of the plans and specifications to meet the 2021 International Building Code as now required by Douglas County, and additional surveying for utility locating for natural gas and liquid ammonium sulfate lines on site.
In February 2024, PWSD received construction bids for the Pump Station and infrastructure from four general contractors (Filanc, RN Civil, Glacier, and Archer Western) with bids ranging from $14,820,380 to $19,388,900. PWSD is recommending moving forward with a construction contract with Filanc. In addition to the general contractor’s construction costs, there will be costs for HDR’s engineering services during construction, third-party testing, and Xcel Energy’s costs for gas line and electrical service upgrades. Xcel has not yet provided the gas and electrical feed design or cost information, so these cost considerations will be brought back to Council at a later date. The total estimated costs for Castle Rock are $8,596,744. A breakdown of these costs is provided in the Discussion section below.
Staff Recommendation
Staff and Castle Rock Water Commission recommend that Town Council approve the Agreement as presented in Exhibit 1.
Proposed Motion
“I move to approve the Resolution as introduced by title.”
Alternative Motions
“I move to approve the resolution as introduced by title, with the following conditions: (list conditions).
“I move to continue this item to the Town Council meeting on _____ date to allow additional time to (list information needed).”
Attachments
Attachment A: Resolution
Exhibit 1: Agreement
Attachment B: Project History