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File #: RES 2026-009    Version: 1 Name:
Type: Resolution Status: Public Hearing
File created: 12/23/2025 In control: Town Council
On agenda: 1/20/2026 Final action:
Title: Resolution Approving the Second Amendment to the Amended and Restated Intergovernmental Agreement Between the Town of Castle Rock and Douglas County for the Highway 85 Wastewater Collection and Treatment System
Attachments: 1. Staff Report, 2. Attachment A: Resolution, 3. Exhibit: 2nd Amendment to the CR-DC IGA for Highway 85 WW 1.9.26 (clean draft).pdf, 4. Attachment B Updated Financial Model.pdf, 5. Staff Presentation - 2nd Amendment Highway 85 WW IGA.pdf
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To:                     Honorable Mayor and Members of Town Council

 

Through: David L. Corliss, Town Manager

 

From:                     Mark Marlowe, P.E., Director of Castle Rock Water

                     Mark Henderson, P.E., Assistant Director Castle Rock Water

 

Title

Resolution Approving the Second Amendment to the Amended and Restated Intergovernmental Agreement Between the Town of Castle Rock and Douglas County for the Highway 85 Wastewater Collection and Treatment System

Body

________________________________________________________________________________

 

Executive Summary

 

Castle Rock Water (CRW) staff recommends Town Council approval of a Resolution approving a second amendment to the previously approved Amended and Restated Intergovernmental Agreement (IGA) with Douglas County. The project completed 60% design and a Guaranteed Maximum Price (GMP) was negotiated with the design-builder, S.J. Louis Construction, Inc. Town Council approved the negotiated GMP as the second amendment to the design-builder construction contract in the amount of $16,766,642.73. The total estimated project budget including easement acquisition and other costs is now $19,784,296. This will require an increase in CRW’s contribution to the project from $4,800,000 to $5,784,296; an increase of $984,296. This additional cost will be recovered under the same terms as the $4,800,000 under a second amendment to the agreement with Douglas County that is presented herein.

 

The First Amendment to the IGA defined how a funding gap for the project would be covered before the project moved into final design and construction. CRW proposed to cover the funding gap and the amendment refined the financial structure and cost recovery terms associated with CRW’s proposal to cover the funding gap. The key terms for the First Amendment included:

                     Castle Rock Water will fund any funding shortfall for construction of the project up to a maximum of $4.8 million.

                     System development fees (SDFs) collected for connectors to the project will pay off the Castle Rock Water contribution to the project first before any of that funding goes back to Douglas County or for improvements or expansions of the sewer system.

                     A 25% surcharge will be added to the portion of the system development fee reimbursing any funding gap covered by Castle Rock Water, and this surcharge will be for use by Castle Rock Water to benefit its existing customers and system.

                     Interest will accrue to the balance of the funding provided by Castle Rock Water at a rate of 5% per year until the funds provided by Castle Rock Water have been fully reimbursed.

                     System development fees will be handled consistently with the original agreement once Castle Rock Water has been reimbursed, except for the 25% surcharge which will continue to be collected and used for improvements or expansions to the system.

 

The Second Amendment maintains all the same terms as the First Amendment but revises the amount that CRW will fund based on the funding shortfall for the project as result of the increased GMP that was negotiated with the design-builder. CRW’s contribution as stated in the IGA will increase by $984,296 to a total of $5,784,296 for the project.

Benefits to CRW of the Second Amendment to the IGA include:

                     Ensures the benefits and terms from Amended and Restated IGA and First Amendment still apply.

                     Maintains the additional financial resources to CRW with the increased funding amount by the additional 25% surcharge over and above the additional financial resources provided by the current extraterritorial surcharge to accomplish our core mission and vision.

                     Ensures that the $14M in ARPA funding will still be used for a lift station and force main that will allow CRW to bring reusable supplies directly back to the Plum Creek Water Reclamation Authority Wastewater Treatment Plant where those supplies can easily be accessed using CRW’s existing infrastructure.

 

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:     Agreement

Attachment B:     Updated Financial Model