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
Walt Schwarz, P.E., CIP Project Manager
Title
Resolution Approving the First Amendment to the Construction Contract with Garney Companies, Inc., for the Plum Creek Water Purification Facility Expansion Project [1929 Liggett Road Castle Rock, CO]
Body
________________________________________________________________________________
Executive Summary
Castle Rock Water (CRW) staff request Town Council approval of a resolution (Attachment A) approving a First Amendment to the Plum Creek Water Purification Facility (PCWPF) Expansion Construction Agreement (Exhibit 1) with Garney Companies, Inc. (Garney). PCWPF is one of the most advanced water treatment plants in the nation and has won numerous awards including the 2021 Outstanding Water Treatment Plant award (Rocky Mountain Section of the American Water Works Association).
The amount of the contract amendment is $_________ and represents Work Package #1 (WP#1). This portion of the construction consists of purchasing equipment packages for the advanced treatment systems as well as site work including buried filter backwash pipe installation. Equipment being purchased with WP#1 includes the ozone generation and destruct systems, liquid oxygen system, side stream ozone injection system, activated carbon adsorption filters, membrane filters, flocculation and sedimentation systems, and an emergency electrical generator for the PCWPF building. The design team is planning for a second work package to be presented to Town Council in January 2025 for the balance of project work.
As previously presented to Town Council, the PCWPF Expansion construction contract will be a Guaranteed Maximum Price Construction Management (GMPCM) arrangement. Construction work is to be awarded in two separate work packages. Garney was selected as the Construction Manager and General Contractor (CM/GC) through a competitive process and has a proven track record in the water and wastewater industry. GMPCM was successfully utilized by the Town for design and construction of the PCWPF Project completed in 2014 and PCWPF Advanced Treatment (AT) Project completed in 2021 (CM/GC was Garney for AT project). Upon authorization to award WP#1, Garney will begin ordering long lead equipment packages. Garney plans to begin site mobilization in October 2024 with overall construction completion of the project planned for Spring 2028 (including startup of new facility).
The Initial Guaranteed Maximum Price (IGMP) for WP#1 based on 30% design documents, including General Conditions (GCs) and other fees, developed by the Town and the design consultant in cooperation with Garney, was $20,553,516. The Final Guaranteed Maximum Price (FGMP) for WP#1 is $__________, an increase due to changes in scope, and price increases with material and equipment packages. Staff recommends executing an Amendment to the contract with Garney for WP#1 to construct the associated components of the Project.
Current known and estimated project costs are shown below:
|
BMcD |
Design (including $119,444 contingency) |
$ 2,508,324 |
|
TCR Permit Fees |
Est. based on PCWPF Advanced Treatment project |
$ 120,000 |
|
|
|
|
|
Garney Companies BMcD |
Pre-construction services Constr. Phase Engineering Services (estimated at 6% of Construction cost) |
$ 311,022 $ 3,900,000 |
|
Garney Companies |
Construction costs WP#1 (FGMP) WP#2 (IGMP) |
$ $45,294,930 |
|
|
TOTAL |
$72,376,770 |
Staff Recommendation
Staff and CRW Commission recommend that Town Council approve the Resolution approving the Contract as presented in the amount of $_________.
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: Location Map