To: Honorable Mayor and Members of Town Council
Through: David L. Corliss, Town Manager
From: Mark Marlowe, P.E., Director of Castle Rock Water
David Van Dellen, P.E., Assistant Director of Castle Rock Water
Roy Gallea, P.E., Engineering Manager
Scott Tait, E.I., Project Manager
Title
Resolution Approving the Tri-Party Agreement for Design Services for the Highway 85 Wastewater Collection and Treatment System Project [Located in Northwestern Douglas County with Castle Rock Water managing the use of Douglas County’s American Recue Plan Act Funding for this project]
Body
________________________________________________________________________________
Executive Summary
Castle Rock Water (CRW) is requesting Town Council approval of a Resolution (Attachment A) approving a Tri-Party Agreement for the Design Services for the Highway 85 Wastewater Collection and Treatment System Project (Exhibit 1) between CRW, Carollo Engineers, Inc. (Carollo) and Dominion Water & Sanitation District (Dominion). The purpose of this agreement is for Carollo to provide CRW and Dominion with preliminary engineering design for the Highway 85 Wastewater Collection and Treatment System Project (Project). This agreement is being funded solely from Douglas County’s American Rescue Plan Act (ARPA) funds. CRW is not putting any funding into this agreement. CRW will receive a 1% project management fee for the ARPA portion of the funding for managing this agreement in an amount of $10,952.00.
This agreement is a sole source agreement with Carollo (see Attachment B). Carollo has been working for Dominion on the design of key portions of the Project for several years, and for this reason, CRW staff is recommending sole sourcing to Carollo. CRW staff believe it would take significant additional cost to bring a new consulting engineer into the design at this point. Further, a separate intergovernmental agreement between CRW and Dominion approved by Town Council on July 18, 2023, requires the use of Carollo for this work. Douglas County has confirmed that this work can be sole sourced using Revenue Loss portions of the ARPA funding. A letter recommending that Douglas County confirm approval of this agreement has been sent to Douglas County, and Castle Rock will only sign this agreement once we receive Douglas County’s concurrence in accordance with the intergovernmental agreement (IGA) between Douglas County and Castle Rock.
The Project will be broken into two phases with Phase 1, Task Order #1, the extent of this request, entailing the preliminary design of the Chatfield Basin Water Reclamation Facility (CBWRF) which will be designed to a capacity of 0.9 million gallons per day (MGD) for the site work and 0.4 MGD from a process and treatment standpoint under this agreement. The CBWRF will be able to discharge treated wastewater effluent to the South Platte River near Waterton Road, along Caretaker Road, South Platte River corridor.
Phase 1 will be funded by Douglas County through ARPA funding in accordance with the IGA between Castle Rock and Douglas County. Future additional capacity at the CBWRF needed by Dominion will be funded by Dominion as part of this agreement.
Approval of Phase 1, Task Order #’s 2, 3, 4 and 5 of the Project, not requested at this time, will be presented to Town Council over the coming year. Task Order # 2 will be for the preliminary and final design of the Louviers lift station and Louviers force main that will connect to the Sterling Ranch sewer system that will flow to the CBWRF. Task Order # 3 will be for the CMAR (Construction Manager at Risk) construction of the Louviers lift station and Louviers force main. Task Order # 4 will be for the final design of the CBWRF. And Task Order # 5 will be for the CMAR construction of the CBWRF.
Approval of Task Order # 6 of the Project in Phase 2 (initially planned in Phase 1), is not requested at this time either, will be presented to Town Council most likely in 2027 or 2028 for a pumping station to reclaim the reusable wastewater from the CBWRF by returning the wastewater to CRR#1 and future CRR#2 through the existing CRW Ravenna pipeline or the future Chatfield Pump Back pipeline. Costs for the pumping station, Return Pumping Facility (RPF), will be funded through new system development fees obtained from the Highway 85 corridor hook-ups.
As specified in the County and Dominion IGAs, CRW will own the Louviers lift station and be a prorated capacity share owner of the RPF. Dominion will own the Louviers force main, the CBWRF and be a prorated capacity share owner of the RPF. CRW will be either the retail or wholesale wastewater provider to the existing collection system in Louviers depending on the IGA currently under discussion with the Louviers Water and Sanitation District (Louviers) and CRW.
The cost of this agreement is $1,095,200.00 for the preliminary engineering design services for Phase 1 (Task Order #1) of the Project. If Dominion chooses to seek additional design of facilities beyond those covered in this agreement, those costs will be covered by Dominion in accordance with the IGA between Dominion and Castle Rock (see Attachment C).
A summary of known project costs and future estimated costs are shown below:
|
Tasks |
ARPA Fund Estimates |
|
CBWRF Preliminary Design Fee (Task Order # 1) |
$ 1,095,200 |
|
Louviers Preliminary and Final Design Fee (Task Order # 2 Estimate) |
$250,000 |
|
Louviers CMAR Construction (Task Order # 3 Estimate) |
$2,500,000 |
|
CBWRF Final Design Fee (Task Order # 4 Estimate) |
$ 2,555,000 |
|
CBWRF CMAR Construction (Task Order # 5 Estimate) |
$17,600,000 |
|
Construction Services (Estimate) |
$ 500,000 |
|
Easements (Estimate) |
$ 410,000 |
|
Peer Review/Audit Services (Estimate) |
$ 0 |
|
CRW Project Management Fee (1%) |
$ 268,000 |
|
Contingency |
$ 1,500,000 |
|
Total Cost |
$26,800,000 |
Staff Recommendation
Staff recommends approval of the Tri-Party Agreement for Design Services for the Highway 85 Wastewater Collection and Treatment System Project for $1,095,200.00.
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: Agreement
Exhibit 2: Certificate of Insurance
Attachment B: Sole Source
Attachment C: Project Map
Attachment D: Dominion-Castle Rock Wastewater IGA