Great Falls City Commissioners approved a $832,995 contract to Vortex Services LLC for the next phase of the sanitary sewer trenchless rehabilitation project during their Sept. 2 meeting.
Staff recommended approval of the contract to restore about 11,700 linear feet of 8-,9- and 12-inch diameter sewer main, which is the equivalent to about 30 city blocks.
The lines will be surveyed, cleaned, lined, reconnected and videoed post-lining.
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The contractor is required to keep all sewer mains functioning during construction by utilizing bypass pumping.
If a sewer service interruption is necessary because of the work, affected customers will be notified and all interruption-related needs of the homeowner will be met until services are re-established, according to the city.
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Traffic interruptions should be limited since most sewer mains are located along alleyways and residential city streets, and trenchless lining has a small construction footprint, according to the city.
City staff completed sewer main inspections to identify and prioritize mains that need rehabilitation, and designed the lining project, to include plans and specifications. City staff will also perform construction phase engineering services, inspection and administration.
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The city received four bids for the project, ranging from $863,191 to $832,995, with Vortex Services submitting the low bid.
The project is included in the public works capital improvement program and budgeted for the sewer utility fund for fewer sewer disruptions and maintenance issues in the sewer system for the next 80 years, according to staff.
