To: Honorable Mayor and Members of Town Council
From: Mark Marlowe, P.E., Director of Castle Rock Water
Title
Resolution Approving a Construction Contract with Colorado Pump Service & Supply Co. for Denver Basin Wells Rehabilitation, Pumping Equipment Replacement, and Well Abandonment Project
Body
________________________________________________________________________________
Executive Summary
The purpose of the resolution (Attachment A) is to request Council approval of a Construction Contract (Exhibit 1) with Colorado Pump Service & Supply Co. for the Denver Basin Wells Rehabilitation, Pumping Equipment Replacement, and Well Abandonment Project. In 2016, Castle Rock Water started a planned well rehabilitation program. This program is designed to help maintain water production yields from our current deep well assets and to reduce the likelihood of emergency well failures. The program targets wells that are showing decline in well yield and/or have been identified as equipped with older pumping equipment. This year, we are targeting five Denver Basin wells for planned rehabilitation and equipment replacement in the first one-third of 2020. Additionally, two inactive wells on Town Property will be abandoned per state regulations. Castle Rock Water recommends approval of a construction contract with Colorado Pump Service & Supply Co. in the amount of $1,086,179.98 plus a five percent Town-managed contingency in the amount of $54,309.00 for a total project cost of $1,140,488.98.
History of Past Town Council, Boards & Commissions, or Other Discussions
Castle Rock Water Commission was informed of the project at their January 22, 2020 meeting and unanimously recommended approval.
Discussion
It is important to keep our existing infrastructure operating in an efficient manner to ensure that peak water demands during the summer months can be met, without resorting to curtailment measures due to well failures. In order to do this, the Water Resources Division has established a yearly rehabilitation and equipment replacement program for priority deep Denver basin wells. A formalized program will help mitigate emergency well services due to pumping equipment failure. This will be accomplished by identifying the wells that are showing declines in production due to biofouling and wells with older pumping equipment. Replacing older pumping equipment often provides the opportunity to resize equipment so that better well efficiency is achieved, potentially reducing the long-term costs to operate the wells. The following wells are identified for the 2020 Denver Basin Rehabilitation and Pumping Equipment Project: Arapahoe Aquifer Wells CR-67, CR-118, CR-218, CR-219, and CR-223 (Attachment B). The combined daily production from the wells is 2.8 million gallons per day.
Castle Rock Water sent out an Invitation to Bid to four qualified contractors and four responded. The following table is a summary of the bids:
|
Lanye Christensen Co. |
Applied Ingenuity, LLC |
Colorado Pump Service & Supply Co. |
Hydro Resources |
|
$2,036,117.00 |
$1,830,907.00 |
$1,816,958.15 |
$2,630,320.00 |
The price sheet did include optional bid items some of which will not be included in the scope of work, thus, the contract pricing is significantly lower than the bid pricing. The optional bid items that are being excluded from the contract include:
• Stainless steel drop pipe in each well;
• Epoxy coating on J-55 drop pipe;
• Offsite water disposal (all rehabilitation water will be able to be disposed at nearby sanitary sewer manholes).
Budget Impact
Funding for the project is available in the approved 2019 and 2020 Budgets. 2019 budget funds will be brought into 2020 as a carryforward for this purpose as the project was originally intended to be started in late 2019. Funding for the project will come from Accounts Repair and Maintenance - Wells 210-4250-442.40-37 ($800,000 budgeted in 2020) and Well Equip and Replacement 210-4275-442.77-48 ($100,000 budgeted in 2020). The following table shows the breakdown of funding. Town staff will use the funds to complete rehabilitation and equipment replacement for this project. Colorado Pump Service & Supply Co. proposed fee is $1,086,179.98. Staff requests an additional $54,309.00 contingency be authorized for a total authorization of $1,140,488.98.
|
Project Account |
Amount |
Contingency |
Total |
|
210-4275-442.40-37 Repair & Maintenance - Wells - 2020 |
$737,673.26 |
--- |
$737,673.26 |
|
210-4275-442.40-37 Repair & Maintenance - Wells - 2019 |
$248,506.72 |
$54,309.00 |
$302,815.72 |
|
210-4275-442.77-48 Well Rehab and Replace 2020 |
$100,000.00 |
--- |
$100,000.00 |
|
TOTAL |
$1,086,179.98 |
$54,309.00 |
$1,140,488.98 |
Staff Recommendation
Staff recommends Town Council approval of the construction contract with Colorado Pump Service & Supply Co. for the Denver Basin Wells rehabilitation, Pumping Equipment Replacement, and Well Abandonment Project.
Proposed Motion
“I move to approve the Resolution as introduced by title.”
Attachments
Attachment A: Resolution
Exhibit 1: Construction Contract
Attachment B: Location Map