To: Members of the Castle Rock Water Commission
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 a Services Agreement between the Town of Castle Rock and Consor Engineering for the Plum Creek Pipeline Central Well Field to PCWPF Project [Located parallel to East Plum Creek through Central Castle Rock, CO]
Town Council Agenda Date: September 3, 2024
Body
________________________________________________________________________________
Executive Summary
Castle Rock Water (CRW) staff requests approval of a resolution (Attachment A) approving a Services Agreement (Exhibit 1) with Consor Engineering (Consor) for the Plum Creek Pipeline Central Well Field to Plum Creek Water Purification Facility (PCWPF) engineering and design services. The Consor Engineering proposed fee is $390,676. This fee includes 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. An evaluation of environmental considerations, an alignment study, and coordination for the anticipated BNSF railroad crossing are included in Consor’s scope. The full scope of services to be completed by Consor is detailed in the proposal included in Exhibit 1. Consor’s rate and fee schedule is also an attachment to the agreement.
Consor shall undertake the work upon execution of the agreement and shall complete the work by Summer 2025. A project location map is provided in an attachment (Attachment B).
Estimated Project Budget
|
Engineering |
$ 390,676 |
|
Construction - Estimated |
$ 11,000,000 |
|
Construction Phase Engineering - Estimated |
$1,000,000 |
|
Land Acquisition* - Estimated |
$ 90,000 |
|
Estimated Project Total |
$12,480,676 |
*One alignment selection goal will be to remain in Town owned property where feasible.
Notification and Outreach Efforts
CRW Staff will evaluate the need for public outreach based on final design location and the level of impact to the public. At this time, no public meetings are included in the scope of work. In the event land acquisition is determined necessary, staff will return to Council for consideration of Eminent Domain Authorization.
Discussion
The Plum Creek Raw Water Return Pipeline brings water from the Plum Creek Diversion Structure and Castle Rock Reservoir No. 1 (CRR1) in Sedalia and alluvial wells through town to PCWPF as a critical water supply to the treatment facility. This pipeline is currently 30-inches from Sedalia to the Central Well Field near North Meadows Drive, then continues as 16-inches from the Central Well Field to PCWPF.
Castle Rock Water is currently designing and implementing an expansion of PCWPF from 6 Million Gallons per Day (MGD) capacity to 12 MGD and Castle Rock Reservoir No. 1 and No. 2 (CRR2) upgrades that will increase our local raw water storage capacity from 240 Acre-Feet to 1,340 Acre-Feet. The approximately 11,000 foot stretch of existing 16-inch Plum Creek Raw Water supply line creates a bottleneck that limits the delivery of our stored renewable water from Sedalia to PCWPF if it is not upsized to an equivalent 30-inch to match current and future proposed upgrades to the Town’s water treatment and supply systems.
A Request for Qualifications (RFQ) was advertised on Bidnet to procure qualified consultants for the 2024 on-call professional services for various Castle Rock Water Capital Improvement Projects. A project specific Request for Proposal (RFP) to assist the Town with pipeline upsizing design services was then sent to six of the pre-qualified consultants for this project. The following table shows the fee proposals received from four of the consulting firms:
|
Consulting Firm |
Total Cost |
|
AE2S |
$395,524 |
|
Consor Engineering |
$390,676 |
|
Forsgren |
No Proposal |
|
Dewberry Engineers |
No Proposal |
|
Providence Infrastructure |
$446,951 |
|
Burns & McDonnell |
$499,656 |
Consor Engineering was chosen by the selection committee to perform the design services for this project and staff has determined the price provided is reasonable and the consultant’s proposal demonstrated the greatest value for this project. Some of the consultants that were invited to propose on this project could not fit this work into their current project loads.
Budget Impact
The Consor proposal fee is $390,676. Staff requests an additional $39,068 (Town-managed 10% contingency) be authorized for a total project authorization of $429,744. The project will be funded from the account shown below.
|
Account Name |
Account Number |
Amount Requested |
Contingency Requested |
2024 Budget |
|
PC Central Well Field |
211-4375-443.76-63 |
$390,676 |
$39,068 |
$1,700,000 |
Staff Recommendation
Staff recommends Town Council approval of the resolution awarding the Services Agreement for Plum Creek Pipeline Central Well Field to PCWPF design services to Consor Engineering in the amount of $390,676 plus a Town-managed 10% contingency in the amount of $39,068, for a total authorization of $429,744.
Proposed Motion
“I move to recommend to Town Council approval of the Resolution as presented”
Attachments
Attachment A: Resolution (Not Attached)
Exhibit 1: Agreement
Attachment B: Location Map