To: Members of the Castle Rock Water Commission
From: Mark Marlowe, P.E., Director of Castle Rock Water
Roy Gallea, Engineering Manager
Emily Huth, Project Manager
Title
Resolution Approving the Construction Contract between the Town of Castle Rock and Garney Companies Inc. for the Ray Waterman Raw Water Treatment Center (RWRWTC) and Bell Mountain Ranch (BMR) LAS Conversion Project- Work Package 1 [Ray Waterman Regional Water Treatment Center and Bell Mountain Ranch Water Treatment Plant] DRAFT
Town Council Agenda Date: July 15, 2025
Body
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Executive Summary
Castle Rock Water (CRW) staff requests approval of a Construction Contract (Attachment A) with Garney Companies (Garney) to complete construction of liquid ammonium sulfate (LAS) chemical conversion projects at the Ray Waterman Regional Water Treatment Center (RWRWTC) and the Bell Mountain Ranch Water Treatment Plant (BMR). This project will be completed in two work packages. Work Package 1 will be executed to allow for procurement of long lead equipment. Work Package 2 will be for the remainder of the work.
Discussion
This contract will include scope at two of the Town’s treatment facilities: RWRWTC and BMR. The work at BMR includes installation of a new liquid ammonium sulfate (LAS) chemical feed system, resulting in the switch from free chlorine to chloramines as the disinfectant in the BMR system to align with the rest of the Town’s water distribution system. The work at RWRWTC will include conversion of the existing anhydrous ammonia chemical system to a liquid ammonium sulfate (LAS) chemical system to improve safety and align with chemicals being used at other facilities in the system. The location of the conversion from free chlorine to chloramines will be modified in the facility to improve operational flexibility and allow the Town to receive WISE flows even when RWRWTC is taken offline. The flowrates CRW receives from WISE are determined by XXX and CRW must take the water, or pay a fee for not receiving it. CRW is slated to receive higher WISE flows that align with the 2025/2026 lower demand season, which is a trend that is expected to continue in future years. CRW staff have determined the RWRWTC LAS Conversion project is an emergency project to complete as efficiently as possible during the 2025/2026 low demand season to minimize fees associated with not being able to receive WISE water when RWRWTC must be taken offline - whether for expected routine maintenance, planned construction projects, or unexpected/emergency repairs. It is preferred that as much of the construction work be completed in the month of November 2025 as possible because that is when WISE flows are not going to be provided to CRW. This project will also include some SCADA improvements scope that was originally going to be completed as part of the SCADA Phase V project at RWRWTC. The LAS Conversion cannot be completed without completing some upgrades to the SCADA system, instrumentation, and programming that was originally going to be completed in the SCADA Phase V project. Including a portion of the SCADA work within the LAS Conversion project will help to prevent rework and additional costs. Given the emergency status of this project, and complexity of coordinating this project with other concurrent projects occurring at RWRWTC, it is recommended that the project be sole-sourced to Garney. Garney is a contractor that is familiar with CRW’s facilities and standards, has consistently completed high quality work on schedule, has crews available to complete the work in the necessary time frame, and is able to work with CRW staff to prioritize procurement of long-lead equipment and develop a construction schedule that minimizes impacts to CRW’s operations. Garney has previously been selected through competitive bidding processes and is currently working on the Plum Creek Water Purification Facility (PCWPF) Expansion Project.
The project will be completed in two work packages. The first work package is being established to allow for procurement of long lead equipment that is necessary for the project. Long lead equipment includes the chlorine analyzers, programmable logic controller (PLC) panel, variable frequency drives (VFDs) for chemical feed pumps, and chemical storage tanks. It is necessary to purchase this equipment as early as possible to complete the work in the necessary schedule. A second work package will be proposed to Town Council for approval after the overall project pricing is known.
Budget Impact
Funding to complete procurement of long lead equipment for the RWRWTC / BMR LAS Conversion projects will amount to $XXX,XXX. Total funding for the project will be provided from three different accounts - listed in the table below.
|
Project |
Account Number |
WP1 Amount |
Budget |
|
Chloramine & WISE Modifications at RWWTC |
211-4375-443.77-72 |
XXXXX |
$1,600,000 |
|
Bell Mountain Ranch WTP LAS Conversion |
210-4275-442.79-33 |
XXXXX |
$500,000 |
|
SCADA System Improvements |
210-4275-442.75-41 |
XXXX |
$3,935,102 |
|
Work Package 1 Construction Contract Total |
|
XXXXXX |
|
Staff Recommendation
Staff recommends Town Council approval of the resolution to approve the Construction Contract between the Town of Castle Rock and Garney Companies Inc for the RWRWTC and BMR LAS Conversion Project in the amount of XXXX.
Proposed Motion
“I move to recommend to Town Council approval of the Resolution as presented”
Attachments
Attachment A: Resolution (Not Attached)
Exhibit 1: Construction Agreement (Not Attached)
Attachment B: RWRWTC Location Map (Not Attached)
Attachment C: BMRWTP Location Map (not Attached)