To: Honorable Mayor and Members of Town Council
Through: David L. Corliss, Town Manager
From: Mark Marlowe, P.E., Director of Castle Rock Water
Matt Benak, P.E., Water Resources Manager
Jakob Hartmann, Water Resources Program Analyst
Title
Resolution Approving an Intergovernmental Agreement with Dominion Water and Sanitation District and Parker Water and Sanitation District for the Canyons Waterline Extension Project [Parker Water and Sanitation District/Town of Castle Rock Interface]
Body
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Executive Summary
The purpose of this memorandum is to request Town Council approval of a resolution (Attachment A) for an Intergovernmental Agreement (IGA) between the Town of Castle Rock (Town), Dominion Water and Sanitation District (Dominion), and Parker Water and Sanitation District (PWSD) for the design and construction of the Canyons Waterline Metering Vault. This metering vault will be constructed with a capacity of 25.2 million gallons per day (MGD) and will measure flows through the Canyons Pipeline to deliver WISE to the Town and to Dominion (through the Town’s system). The vault will replace the meter owned and operated by Castle Rock Water (CRW) at the Ray Waterman Water Treatment Plant and act as the primary meter for measuring flows (See Attachment B). This was originally contemplated in the Wheeling IGA with the Town and PWSD.
Castle Rock and Dominion will be responsible for their pro-rata share of the metering vault costs. The cost splits would be 83.33% for Castle Rock and 16.67% for Dominion. Castle Rocks share is larger due to the fact that we will be receiving ultimately 21 MGD through this vault and Dominion will receive 4.2 MGD. Parker would not bear any costs for this metering vault. The estimated costs for the engineering consultants design work is $50,000 and the estimated construction cost is $608,000. The schedule for construction is not currently known but will likely take place in 2023.
History of Past Town Council, Boards & Commissions, or Other Discussions
On March 6, 2018 Town Council approved the Wheeling Agreement between Parker Water and Sanitation District and the Town of Castle Rock.
Castle Rock Water staff presented this item to the Castle Rock Water Commission at their meeting held on July 27, 2022, and the Castle Rock Water Commission voted 6 to 0 to recommend Town Council approve the Resolution as presented.
Discussion
On May 19, 2022, Staff from the Town and PWSD had a video conference to discuss the proposed meter vault that is being designed by PWSD’s consulting engineer (Providence Infrastructure Consultants). To date, PWSD and the Town have been using the metering vault located at Ray Waterman to determine the quantity of water delivered to CRW and for billing purposes; however, the Wheeling IGA between the Town and PWSD provides that “The volume of water delivered by PWSD to Castle Rock at the Point of Delivery shall be measured by a meter owned and operated by PWSD located at the Point of Delivery, except that until such time as PWSD installs its own meter at the interconnect point designated in Exhibit A as the Castle Rock Interconnect, the volume of water shall be measured by a meter owned by Castle Rock at Castle Rock’s metering point at Ray Waterman.” Furthermore, Section 2.D of the IGA provides that PWSD is not responsible for the cost of the facilities; however, in association with the tank work they are performing in the area, they included this metering vault work.
Given the opportunity to include this meter vault work along with the other PWSD infrastructure improvements, it is time to develop a cost sharing IGA. Castle Rock and Dominion will be responsible for their pro-rata share of the metering vault costs. The splits would be 21/25.2 = 83.33% for Castle Rock and 16.67% for Dominion (the larger flow split is due to the fact that Castle Rock ultimately will be receiving 21 MGD through this vault [6 MGD WISE, 3 MGD Box Elder, and 12 MGD from water treated at PWSD’s Rueter - Hess Water Purification Facility]). PWSD would not bear any costs for this metering vault. The estimated costs for the engineering consultants design work is $50,000 and the estimated construction cost (Garney is the General Contractor) is $608,000.
Budget Impact
The total estimated costs are six hundred fifty-eight thousand dollars ($658,000.00).
The estimated project costs and capacity shall be allocated as follows
Castle Rock: 83.33% * $658,000 = $548,311 for 21 MGD
Dominion: 16.67% * $658,000 = $109,689 for 4.2 MGD
The Water Resources CIP/ WISE Infrastructure account <211-4375-443.77-72> will be used to pay for costs associated with this project.
Staff Recommendation
Staff and Castle Rock Water Commission recommend that Town Council approve the IGA as presented in Exhibit 1.
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
Attachment A: Resolution
Exhibit 1: Agreement
Attachment B: Project Location Map