Mountain Water Company employees said they're making steady progress in reducing leakage in Missoula's water system.
Employees said currently, crews are working to repair a large main leak that's releasing more than 300 gallons per minute.
That work will shut down East Beckwith Avenue and Helen Avenue.
Employees said leakage grew to be a serious problem in 2007, and since then, the company has invested millions of dollars into repairing leaks.
Logan McInnis, Mountain Water Chief Engineer, said, "Over that time, we've been able to bring our leakage down by about 18% since 2007, so we feel real good about the progress we've been able to make on our leakage."
Mountain Water officials said most leaks don't surface in Missoula because the soil is so porous, making them difficult to locate.
They're using new technology to recognize changes in water flow, which can indicate a major leak.