To: Honorable Mayor and Members of Town Council
Through: David L. Corliss, Town Manager
From: Mark Marlowe, P.E., Director of Castle Rock
Lauren Moore, Water Resources Manager
Zuzana Howard, Water Resources Project Analyst
Title
Resolution Approving a Construction Contract with Hydro Resources - Rocky Mountain, Inc., for the 2026 Denver Basin Aquifer Wells Rehabilitation, Pumping Equipment Replacement, and Well Abandonment Project [Five Wells within the Meadows, Founders, Castle Oaks, and Terrain subdivisions]
Body
________________________________________________________________________________
Executive Summary
The purpose of the resolution (Attachment A) is to request Town Council approval of a Construction Contract (Exhibit 1) with Hydro Resources - Rocky Mountain, Inc (Hydro Resources) 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. This project will also 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 rehabilitated.
After Hydro Resources was selected as the lowest bidder, Water Resources Staff identified one Aquifer Storage and Recovery (ASR) Well (CR-233) that needs repairs and asked the contractor for an additional quote. Hydro provided a cost for investigation, pulling the equipment, and replacing the drop pipe for a total of $58,060. The original bid amount is $553,070 which brings the contract total to $611,113. CRW recommends approval of a construction contract with Hydro Resources in the amount of $611,130 plus a ten percent Town-managed contingency in the amount of $61,113, for a total project cost of$672,243. 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.
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 |
$611,130 |
$61,113 |
$672,243 |
Staff Recommendation
Staff recommends Town Council approval of a Construction Contract with Hydro Resources for the 2026 Denver Basin Aquifer Wells Rehabilitation and Pumping Equipment Replacement Project.
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: Construction Contract
Attachment B: Location Map