To: Honorable Mayor and Members of Town Council
Through: David L. Corliss, Town Manager
From: Daniel Sailer, P.E., Public Works Director
Title
Resolution Approving a Construction Contract with ABCO Contracting, Inc., for the 2022 Bridge Rehabilitation for South Wilcox Street Over East Plum Creek and Plum Creek Parkway Over Union Pacific Railroad
Body
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Executive Summary
Maintaining the Town’s bridges is important for public safety, travel efficiency, and as a means to extend the useable life of the bridge structure. This overall project is the annual Bridge Maintenance Program for the Town’s bridges and is intended to preserve the Town’s bridge infrastructure. The purpose of this item is to request endorsement from Town Council to enter into a contract to perform certain bridge maintenance activities. This program meets the Town’s Public Works values of:
• Low Environmental Impact
• High Safety
• Low Downtime
• Low Lifecycle cost
• Reliability
The Town of Castle Rock annually budget’s for the Bridge Maintenance Program to perform needed maintenance to the Town’s bridges. Maintenance work generally consists of deck wearing course overlay, deck repairs, girder & abutment repairs, bridge rail repairs, and approach guard rail repairs. Maintenance work will be performed on the South Wilcox Bridge over East Plum Creek and Plum Creek Parkway Bridge over the Union Pacific Railroad (UPRR). Maintenance locations activities are shown on the 2022 Bridge Maintenance Program map (Attachment A).
The Council approved budget for the 2022 Bridge Maintenance Program is $818,800. The low bid results for identified work is $357,322. Staff recommends adding a contingency to the 2022 Bridge Maintenance project for unforeseen conditions that total $35,732, or 10% of the contract amounts. Staff is comfortable with the contingency amount and believes the identified work can be managed to comply with the plans and specifications, and remain within budget. This leaves an unencumbered budget of $425,746 in the 2022 Bridge Maintenance account.
Notification and Outreach Efforts
Staff has developed specific public coordination outreach to ensure that residences and businesses will understand construction impacts and how this may affect access to individual businesses and residences. Public outreach will occur in numerous forms such as; 1) Town newsletters, 2) HOA mediums such as newsletters, 3) Town social media, 4) Press releases, 6) Town’s web site and others, and 7) Variable Message Signs. Residents and businesses will be notified of actual dates that work is to be performed, and traffic control plans will be developed and managed to ensure worker and public safety.
Discussion
Castle Rock’s bridges are inspected every two years through CDOT’s Off-System Bridge Inspection Program, in accordance with the requirements of the National Bridge Inspection Standards (NBIS).
Staff has reviewed these documents in the selection of bridges to be considered for the 2022 Bridge Maintenance Program. Staff selected the South Wilcox over East Plum Creek Bridge and Plum Creek Parkway Bridge over UPRR to repair bridge deck potholes, asphalt mill and overlay and address areas of deterioration on girders and columns.
The Town contracted with BASIS PARTNERS for engineering design services on the South Wilcox and Plum Creek Parkway bridges. Plans and specifications were posted on Bidnet June 15, 2022 to solicit competitive bids. The Town received four (4) bids ranging from the low bid of $357,322 to $543,408 on June 29, 2022.
The low bid was checked for accuracy, references were checked, and all documents were reviewed for contract compliance. Staff believes that the recommended bidder is qualified to perform the work associated with the respective maintenance contract. A summary (Attachment B) shows the individual bids, and the contractors.
Pending approval, construction is expected to take place during August/September of 2022. The contractor will use the time between Notice of Award and expected construction time to survey, develop shop drawings and fabricate any long lead materials. The contract was bid with the option of night work for mill and overlay operation on the South Wilcox Bridge. Day time installation is approved with restrictions on the time of lane closures. The Plum Creek Parkway Bridge was bid with the option of night work; day time work is approved with restrictions on lanes closures. Town Council approved the allowance for night work with Resolution 2022-031 on March 15, 2022.
Budget Impact
The 2022 unencumbered budget for the Bridge Maintenance Program is $818,800. This full amount is proposed to be encumbered to be utilized for completing the remaining bridge maintenance activities planned for this year under this contract. The following is a brief summary:
Fund Account Number Amount
Available budget 120-3140-431-40-42 $818,800
S. Wilcox & Plum Creek Pkwy Maintenance 120-3140-431-40-42 ($393,054)
Remaining funds $425,746
Staff Recommendation
Public Works Commission and Staff is recommending Town Council approve the resolution as introduced by title. This item was presented to the Public Works Commission on July 11, 2022, which unanimously voted to recommend approval of the resolution.
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 changes ______”
“I move to continue this item to a future Town Council agenda”
Attachments
Resolution
Agreement
Attachment A: Map
Attachment B: Bid Summary