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 Second 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 requests Town Council approval of a resolution (Attachment A) approving a Second Amendment to the Plum Creek Water Purification Facility (PCWPF) Expansion Construction Agreement (Exhibit 1) with Garney Companies, Inc. (Garney).
The amount of the contract amendment is $6,739,585 and represents Work Package #2 (WP#2). This portion of the construction consists of purchasing the ozone equipment package for the advanced treatment system as well as high service and membrane feed pumps. Ozone equipment being purchased with WP#2 includes ozone generators and destruct systems, liquid oxygen system, and side stream ozone injection systems. The design team is working on a third and final work package to be presented to Town Council around April 2025. WP#3 (Third Amendment) will include 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. PCWPF is one of the most advanced water treatment plants in the nation and has won numerous awards including the Engineering Excellence Award 2022 (American Council of Engineering Companies). Construction work is to be awarded in three 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#2, Garney will begin ordering the ozone and vertical turbine pump 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#2 based on 60% design documents, including General Conditions (GCs) and other fees, developed by the Town and the design consultant in cooperation with Garney, was $6,609,541. The Final Guaranteed Maximum Price (FGMP) for WP#2 is $6,739,585. A cost increase due to owner directed changes in scope with the ozone material and equipment package. Staff recommends executing an Amendment to the contract with Garney for WP#2 to construct the associated components of the Project.
Current known and estimated project costs are shown below:
|
Burns & McDonnell Engineering (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 $ 4,016,202 |
|
Garney Companies |
Construction costs WP#1 (FGMP) WP#2 (IGMP) WP#3 (IGMP) |
$ 18,571,591* $ 6,739,585* $ 41,821,534** |
|
|
TOTAL |
$ 74,088,258 |
*Actual
**Current Estimate
Budget Impact
Funding for this project was included in the 2024 budget in the project fund shown below. Current account balance in this account is approximately $1,053,072. A budget amendment will be completed in 2024 to fully fund the project.
|
Project |
Account Number |
This Contract |
|
Advanced Oxidation Facility |
211-4375-443-77-75 |
$6,739,585 |
Staff Recommendation
Staff and CRW Commission recommend Town Council approval of the Resolution as presented.
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: Second Amendment to the Construction Agreement
Attachment B: Location Map