City staff requesting additional time to review bids for water main river crossing project
City staff have been preparing for two new water main river crossings and were planning to award a contract for the project during Tuesday’s meeting but are asking City Commissioners to delay consideration to the July 16 meeting.
The project includes installing water main utilizing both horizontal directional drill and open cut methods of installation.
The horizontal directional drill method will install about 3,600 lineal feet of fused 24-inch DR18 PVC pipe under the Missouri River, 300 lineal feet of 42-inch steel casing pipe under BNSF railroad right-of-way, and 1,600 lineal feet of fused 20-inch DR18 PVC pipe under the Sun River, according to city public works.
The open cut method will install about 1,600 lineal feet of 24-inch pipe, and 1,200 lineal feet of 20-inch pipe, according to public works.
The bid date was pushed back one week from June 19 to June 28 due to the complexity of the project and all horizontal directional drill contracts are out of state, according to staff.
The additional week allowed the horizontal directional drill contractors to get bids from local contractors for the open cut pipe installation and allow for more contract clarification, according to public works.
Bids were opened on June 28 and staff requested more time for consideration of the bids to make a recommendation to the commission on July 16.
The water main crossings are needed under the Missouri and Sun rivers to ensure adequate water pressure and quantity for the expanding city and provide redundancy for unexpected repairs on existing mains, according to city staff.
To complete this project the the city is working in cooperation with different regulations and agencies including:
- City of Great Falls Flood Plain Permit
- Montana Land-Use Easement
- U.S. Army Corps of Engineers
- Montana Department of Transportation (MDT) – Utility Occupancy Permit
- Montana Department of Environmental Quality (DEQ)
- Burlington Northern Santa Fe Railroad (BNSF)
- Montana Historical Society
- Montana Department of Fish and Game (FWP)
- Montana Department of Natural Resource and Conservation (DNRC)
- Meadowlark Country Club (MLCC)
The project is being funded through the city’s water capital improvement fund.
In May, the commission awarded a $98,720 contract to Capcon LLC for the replacement of about 60 lineal feet of 30-inch water main across Upper River Road and the installation of about 40 lineal feet of new 24-inch water main along the east side of Upper River Road.
The project was the first phase of the river crossing project and included new pipe for a fire hydrant lead and a new fire hydrant.
The May project installed a 30-inch by 24-inch tee for future connection, according to public works.
“The timing of this project is crucial and needs to be done early in the season before the water demand for irrigation increases,” according to the May staff report from public works.
The city received four bids for this portion of the project. Those bids were opened on May 8 and ranged from $98,720 to $172,934. Capcon submitted the low bid.
This project is being funded through the Water Capital Improvement fund.
Last summer, the commission approved a $866,028 contract to Thomas Dean & Hoskins Engineering for the design phase of the water crossing project.
The project will also tear up some of Verde Park and a large portion of Meadowlark Park for staging and laying water mains that will be pulled under the river, according to the Park and Recreation department.
Last fall, TD&H contracted with Sletten Construction and O’Keefe Drilling to drill bore logs to determine the types of soil and rock and the depths they are encountered, both on land and in the river channels.
According to city documents, a new 24-inch fusible C905 PVC pipe will be designed for directionally drilled installation under the Missouri River from Verde Park to Meadowlark Park. Additional open trench pipe installation will be constructed through parks and city rights-of-way in order to complete connections to the existing distribution system.