To: Members of the Castle Rock Water Commission
From: Mark Marlowe, P.E., Director of Castle Rock Water
Lauren Moore, Water Resources Manager
Zuzana Howard, Water Resources Project Analyst
Title
Resolution Approving a Construction Contract between the Town of Castle Rock and ???? for the 2026 Denver Basin Aquifer Wells Rehabilitation, Pumping Equipment Replacement, and Well Abandonment Project [Five wells spread out within the Meadows, Founds, Castle Oaks, and Terrain subdivisions]
Town Council Agenda Date: February 3, 2026
Body
________________________________________________________________________________
Executive Summary
The purpose of the resolution (Attachment A) is to request Town Council approval of a Construction Contract (Exhibit 1) with ____________ for the 2026 Denver Basin Aquifer Well Rehabilitation, Pumping Equipment Replacement, and Well Abandonment Project. In 2016, Castle Rock Water started a planned well rehabilitation program. This program is designed to help maintain water production yields from our current deep well assets and to reduce the likelihood of emergency well failures. The program targets wells that are showing declines in well yield and/or have been identified as equipped with older pumping equipment. This program has proven successful over the past ten years due to limited well failures during peak demand season, increased well efficiencies, decreased power consumption, and increases in well yield. The 2025 rehab project included three wells and contributed to an increase in well efficiency of 9.5% over the past year, as shown below.
|
Year |
Well Production of 2025 Rehab Project Wells |
|
2024 (pre-rehab) |
582 gpm |
|
2025 (post-rehab) |
637 gpm |
This spring, CRW is targeting three Denver Basin Wells (CR-44, CR-118, and CR-219) for planned rehabilitation and equipment replacement. As a preventative measure, one well (CR-72R) is scheduled for a video survey to evaluate calcium build-up that was discovered and removed four years ago. Lastly, this project will consist of an abandonment of one inactive well (CR-92) in preparation for the construction of the new Fire Station in Castle Oaks. Attachment B shows the locations of the wells that will be serviced. CRW recommends approval of a construction contract with _______ in the amount of $XXX plus a ten percent Town-managed contingency in the amount of $XXX for a total project cost with ________ of $XXX. The schedule is critical for this project given the need for these wells during irrigation season. Work will begin immediately upon contract approval and is scheduled for substantial completion by June 2026.
Notification and Outreach Efforts
All work will be completed on Town of Castle Rock property. Notification and outreach efforts will include postcard mailers to nearby homes describing the project details such as location, dates, and work hours. Additionally, the project will be listed on the Castle Rock Water website.
Discussion
It is important to keep our existing infrastructure operating in an efficient manner to ensure that peak water demands during the summer months can be met, without resorting to water curtailment measures due to well failures. In order to do this, the Water Resources Division has established a yearly rehabilitation and equipment replacement program for priority deep Denver Basin wells. A formalized program helps mitigate emergency well services due to pumping equipment failure. This is accomplished by identifying the wells that are showing declines in production due to biofouling and wells with older pumping equipment. Replacing older pumping equipment often provides the opportunity to resize equipment so that better well efficiency is achieved, reducing the long-term costs of operating the wells. CRW typically budgets $1,000,000 annually for repair and maintenance.
The following wells are identified for the 2026 Denver Basin Aquifer Well Rehabilitation and Pumping Equipment Project: Arapahoe Aquifer Wells CR-118, CR-219 and Dawson Aquifer Well CR-44. The combined daily production from the wells is 1.0 million gallons per day, which collectively represents approximately 5% of our 5-year average peak summer daily demand. The project will also consist of an abandonment of one inactive Well CR-92 and a video investigation of Well CR-72R to evaluate calcium build-up.
Castle Rock Water sent out an Invitation to Bid on Rocky Mountain BidNet. The following table is a summary of the bids:
Upon review of the bid proposals, schedule, and pricing, CRW Staff decided to move forward with ______. _______ has successfully worked with the Town on previous well rehabilitation projects and is also the emergency on-call contract with CRW’s operations team.
Budget Impact
Funding for the project will come from the following account: CIP Repair and Maintenance - Wells 210-4250-442.40-37, which has a balance of $1,000,000.
|
Project Account |
Contract Amount |
Contingency |
Total Authorization |
|
210-4275-442.40-37 Repair & Maintenance - Wells - 2026 |
$XXX |
$XXX |
$XXX |
Staff Recommendation
Staff recommends Town Council approval of a Construction Contract with ______for the 2026 Denver Basin Aquifer Wells Rehabilitation and Pumping Equipment Replacement Project.
Proposed Motion
“I move to recommend to Town Council approval of the Resolution as presented”
Attachments
Attachment A: Resolution
Exhibit 1: Construction Contract
Attachment B: Location Map