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Item 1.A.2.
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| City Council Regular | |
| Date: | 11/25/2024 |
| Title: | W.O. 23-96: Water Treatment Plant Intake No. 2 Catwalk Improvements |
| Presented by: | Debi Meling |
| Department: | Public Works |
| Presentation: | No |
| Legal Review: | Not Applicable |
| Project Number: | N/A |
RECOMMENDATION
Staff recommends the City Council award a construction contract to Dick Anderson Construction for W.O. 23-96: Water Treatment Plant Intake No. 2 Catwalk Improvements, in the amount of $4,157,700.
BACKGROUND (Consistency with Adopted Plans and Policies, if applicable)
The City of Billings Water Treatment Plant (WTP) has two intakes on the Yellowstone River. Intake #1 is the primary intake. Intake No. 2 is located upstream and is out and under the middle of the river. Intake #2 serves as a critical asset to the City’s water treatment process and is utilized more in the lower river flow months (October through April) when water levels are low or the river is covered in ice.
Intake No. 2 includes a catwalk bridge and a building. The catwalk structure provides a walkway across the river, spanning from the Low Service Pump Station to the Intake No. 2 structure. The bridge also carries utilities required to operate the intake. The building houses all the electronics and provides an enclosure for the operations and maintenance of the intake.
The bridge structure has sustained damage many times since initial construction, but in the spring of 2022, the Yellowstone River experienced a 500-year flood event that caused significant damage to the bridge and building. These included structural damage to the existing catwalk, building flooding, and damage to the guardrails, electrical and gas lines, and process air piping. This historical flood event caused the entire intake to be unsafe for operations, requiring extensive repairs to re-establish a safe redundant raw water intake system for the water plant.
The proposed repairs involve raising the catwalk above the 500-year flood level and modifying the intake building accordingly. The existing catwalk deck and building will be removed. The existing piers and building foundation will be extended to the new elevation. The project generally consists of replacing and lifting the catwalk and building by approximately 5 feet, including structural rehabilitation; demolition; construction of a new precast building; and process, mechanical, and electrical improvements. The new catwalk will include new structural steel and decking and new aluminum handrails, and galvanized steel stairs will be installed for access to the elevated catwalk. Process improvements include modifying the gate actuators and extending the screens to make the intake more efficient and allow more water to be brought in. Exterior lighting will be enhanced to provide a safer working environment. The existing steel deflector nose on the upstream side of the intake structure will be extended to the higher elevation to help keep debris from crashing directly into the structure. Lastly, the concrete will be repaired that encases the underwater pipes that move the water from the intake to the Low Service Pump Station.
This project is funded with insurance proceeds, State Disaster and Emergency Services (DES) funds, FEMA disaster funds, FEMA hazard mitigation funds, and City Water Funds. It was a programmed water project identified in the FY24 CIP. The project was bid previously, but no bids were received, so after making some design and bidding modifications, the project was re-bid.
W.O. 23-96 was advertised September 13, 20, and 27, and October 4, 11, 18, and 25, 2024 in the Yellowstone County News and on the City's website. Bids were opened October 29, 2024. One bid was received from Dick Anderson Construction and is the lowest responsible bid. City staff and the engineering consultant reviewed the bid items and the bid cost appears reasonable based on the scope of work.
Intake No. 2 includes a catwalk bridge and a building. The catwalk structure provides a walkway across the river, spanning from the Low Service Pump Station to the Intake No. 2 structure. The bridge also carries utilities required to operate the intake. The building houses all the electronics and provides an enclosure for the operations and maintenance of the intake.
The bridge structure has sustained damage many times since initial construction, but in the spring of 2022, the Yellowstone River experienced a 500-year flood event that caused significant damage to the bridge and building. These included structural damage to the existing catwalk, building flooding, and damage to the guardrails, electrical and gas lines, and process air piping. This historical flood event caused the entire intake to be unsafe for operations, requiring extensive repairs to re-establish a safe redundant raw water intake system for the water plant.
The proposed repairs involve raising the catwalk above the 500-year flood level and modifying the intake building accordingly. The existing catwalk deck and building will be removed. The existing piers and building foundation will be extended to the new elevation. The project generally consists of replacing and lifting the catwalk and building by approximately 5 feet, including structural rehabilitation; demolition; construction of a new precast building; and process, mechanical, and electrical improvements. The new catwalk will include new structural steel and decking and new aluminum handrails, and galvanized steel stairs will be installed for access to the elevated catwalk. Process improvements include modifying the gate actuators and extending the screens to make the intake more efficient and allow more water to be brought in. Exterior lighting will be enhanced to provide a safer working environment. The existing steel deflector nose on the upstream side of the intake structure will be extended to the higher elevation to help keep debris from crashing directly into the structure. Lastly, the concrete will be repaired that encases the underwater pipes that move the water from the intake to the Low Service Pump Station.
This project is funded with insurance proceeds, State Disaster and Emergency Services (DES) funds, FEMA disaster funds, FEMA hazard mitigation funds, and City Water Funds. It was a programmed water project identified in the FY24 CIP. The project was bid previously, but no bids were received, so after making some design and bidding modifications, the project was re-bid.
W.O. 23-96 was advertised September 13, 20, and 27, and October 4, 11, 18, and 25, 2024 in the Yellowstone County News and on the City's website. Bids were opened October 29, 2024. One bid was received from Dick Anderson Construction and is the lowest responsible bid. City staff and the engineering consultant reviewed the bid items and the bid cost appears reasonable based on the scope of work.
ALTERNATIVES
City Council may:
- Award a construction contract to Dick Anderson Construction for the total amount of $4,157,700; or
- Not award a contract and reject all bids. If the bid is not awarded, Intake No. 2 will continue to be unsafe to operate, and the WTP will continue to operate without a redundant intake for water supply.
FISCAL EFFECTS
The following bids were received:
The project was budgeted in FY25 using insurance proceeds ($1,333,000), City Water Funds ($430,600), State of Montana DES funds ($536,000), and FEMA Public Assistance and Mitigation funds ($2,900,000) totaling $5,196,600. Considering previously encumbered funds of $407,600 for engineering fees and this contract award, there are about $631,300 in remaining funds. Remaining funds will be used for any change orders and construction contract administration. There are adequate funds to award the contract.
| Bidder (Contractor) | Schedule 1 (Base) Bid Amount | Additive Alternate #1 (extending upstream steel debris deflector) | TOTAL |
| Dick Anderson Construction | $ 4,098,800.00 | $ 58,900.00 | $ 4,157,700.00 |
The project was budgeted in FY25 using insurance proceeds ($1,333,000), City Water Funds ($430,600), State of Montana DES funds ($536,000), and FEMA Public Assistance and Mitigation funds ($2,900,000) totaling $5,196,600. Considering previously encumbered funds of $407,600 for engineering fees and this contract award, there are about $631,300 in remaining funds. Remaining funds will be used for any change orders and construction contract administration. There are adequate funds to award the contract.