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 53 Corporation, LLC for the Industrial Tributary Stabilization Project
Body
________________________________________________________________________________
Executive Summary
Castle Rock Water is seeking Town Council approval of a Resolution (Attachment A) awarding a construction contract (Exhibit 1) with 53 Corporation, LLC for the Industrial Tributary Stabilization Project in the amount of $1,353,533, plus a 10% Town-managed contingency in the amount of $135,353, for a total project authorization of $1,488,886. This project is funded through the Stormwater Enterprise and is located along Town open space east of the Miller Activity Complex (see Attachment B). Drainageway improvements generally include grade control structures to restore the degraded stream, improve water quality and preserve open space, utilities and future trails. The project is scheduled to be completed by May 2020. Funding for the project will come from rates (27%) and fees (73%) associated with growth.
This project is part of a broader effort to address legacy Stormwater needs in the Town. CR Water budgeted $10M in debt to be taken in 2020 to address these needs. Council approved Resolution 2019-119 to allow reimbursement of expenses in 2019 for this project against a potential debt issuance.
Notification and Outreach Efforts
The project is located within Town owned open space. Staff will provide notifications via direct mailings to adjacent property owners, news releases and social media postings, as needed. Project details and updates will be provided on CRgov.com/water.
History of Past Town Council, Boards & Commissions, or Other Discussions
This project was identified in the Omni, Industrial and Westfield Watershed Master Plan Preliminary Design Report (Master Plan), adopted by Council through Resolution No. 2010-57 on September 7, 2010.
Castle Rock Water Commission will be provided with an update at the scheduled December 11, 2019 meeting.
Discussion
The Master Plan, prepared in 2010, determined the need for stabilization measures along Industrial Tributary to mitigate for development impacts and restore a healthy and sustainable stream system. Through the project reach, the channel is incised between 2 to 10 feet. This project includes nine (9) grouted boulder grade control structures to restore the channel invert between Prairie Hawk Drive and the Miller’s Landing development.
Environmental impacts and permitting are important considerations in channel improvement design. Due to stream degradation, large pine trees are being lost from undercutting and erosion in the channel. Although it would be impossible to save all existing trees during construction, significant effort was made in the design process to minimize the number of trees to be removed as a result of construction. Additionally, the proposed improvements will restore essential root support along the drip line of existing trees to maintain ecological health along the corridor and temporary construction disturbances will be revegetated to restore upland and riparian habitat. The Town has obtained authorization from the U.S. Army Corps of Engineers to construct the proposed improvements.
The Town solicited construction bids via Rocky Mountain BidNet. Bids were received from five (5) contractors and the pricing is summarized below:
|
Contractor |
Total |
|
53 Corporation |
$ 1,353,533 |
|
Sabell's Civil & Landscape |
$ 1,434,194 |
|
ESCO Construction Company |
$ 1,538,586 |
|
Frontier Environmental Services |
$ 2,065,499 |
|
Iron Woman Construction |
$ 2,380,013 |
|
Engineer’s Estimate |
$ 1,679,176 |
|
53 Corporation is the confirmed lowest bidder, having also met the qualification requirements under the contract. Construction is anticipated to begin in December 2019 and be substantially complete by May 2020, weather permitting.
Budget Impact
This project will be funded through the Stormwater Fund, as shown below. Total project costs, including contingency, are $1,488,886.
|
Fund |
Account |
Total |
Cont. |
Auth. |
Budget |
|
Industrial Trib Stabilization |
212-4475-444.75-57 |
$1,353,533 |
$ 135,353 |
$1,488,886 |
$ 821,479 |
These amounts will be funded through available 2019 budget, plus a supplemental budget request for additional funds required to complete this project. Sufficient funds are available in the Stormwater capital reserve fund balance for this project.
The total multi-year expenditures for this project are as follows:
|
Fund |
Engineering & Permitting |
Bid & Const Support |
Construction |
Total |
|
Stormwater |
$ 102,297 |
$ 55,378 |
1,488,886 |
$ 1,646,561 |
Staff Recommendation
Staff recommends Town Council approval of a Resolution awarding a Construction Contract to 53 Corporation, LLC for the Industrial Tributary Stabilization Project in the amount of $1,353,533, plus a 10% Town-managed contingency in the amount of $ 135,353, for a total project authorization of $1,488,886.
Proposed Motion
“I move to approve the Resolution as introduced by title.”
Attachments
Attachment A: Resolution
Exhibit 1: Construction Contract
Attachment B: Site Map