To: Honorable Mayor and Members of Town Council
Through: David L. Corliss, Town Manager
From: Mark Marlowe, P.E., Director of Castle Rock Water
Roy Gallea, P.E., Engineering Manager
Erin Evans, P.E., Project Manager
Title
Resolution Approving the First Amendment to Town of Castle Rock Services Agreement with Consor North America, Inc. for the Plum Creek Pipeline Central to PCWPF Project [Located parallel to Plum Creek through central Castle Rock, CO]
Body
________________________________________________________________________________
Executive Summary
Castle Rock Water (CRW) staff requests approval of a Resolution (Attachment A) approving a First Amendment to the Services Agreement (Exhibit 1) with Consor Engineering (Consor) for the Plum Creek Central Pipeline to Plum Creek Water Purification Facility (PCWPF) engineering and design services. The proposed First Amendment is a contract addition of $78,405 and a time extension of approximately nine (9) months.
Design services to upsize the existing Plum Creek Raw Water Return Pipeline from an existing 16-inch diameter to an equivalent 30-inch diameter to meet renewable water capacity needs to PCWPF are currently in progress. A routing study was conducted to identify possible alignments for a second, parallel pipeline to the existing 16-inch to achieve the total required capacity required. During this routing study, additional alignments outside of the existing raw water pipeline corridor were identified and evaluated as the most feasible considering utility congestion, impacts to recent developments, and impacts to proposed developments. As a result of this shift, additional field survey and coordination were required. Also, additional potholes are required due to the increased number of existing utilities within the area of the new pipeline alignment. Additional time is requested for the service agreement to accommodate the new project scope and extra time spent evaluating alternative pipeline alignments. The full scope of services to be completed by Consor is detailed in the proposal included in Exhibit 1.
Consor shall undertake the work upon execution of the amendment and shall complete the work by the extended completion date in September 2026. The routing study map for the Plum Creek Pipeline Central to PCWPF Upsize project is provided in an attachment showing the selected alignment (Attachment B).
Budget Impact
The Consor Service Agreement is for $390,676 with an initially authorized $39,068 in Town managed contingency. This First Amendment proposed fee is $78,405. Staff requests an additional $78,405 for First Amendment services and to maintain the existing $39,068 contingency for a total project authorization of $508,149. The project will be funded from the PC Central Well Field account 211-4375-443.76-63. The following table summarizes the budget impacts for the project.
|
Agreement |
Contract $ |
Contingency $ |
Authorization $ |
|
Original Agreement (Approved 9/3/2024) |
390,676 |
39,068 |
429,744 |
|
Current Totals |
390,676 |
39,068 |
429,744 |
|
|
|
|
|
|
Amendment 1 (under consideration) |
78,405 |
0 |
78,405 |
|
Amended Totals |
469,081 |
0 |
508,149 |
Staff Recommendation
Staff recommends Town Council approval of the resolution for the First Amendment to the Services Agreement for Plum Creek Pipeline Central to PCWPF design services to Consor Engineering in the amount of $78,405 for a total authorization of $508,149.
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
Staff Report
Attachment A: Resolution
Exhibit 1: Agreement
Attachment B: Routing Study Map for Plum Creek Pipeline Central to PCWPF