Work will continue this week on a water main extension project outside Jamestown.

A section of Jacksonville Road is expected to be closed 7 a.m. to 4 p.m. each day through at least Friday.

Tuolumne Utilities District staff say roads are supposed to remain open to local residents and customers of Pet Vacations. Other motorists can expect to find a signed detour in place. Construction is taking place between Dutch Mine Road and Stent Cut-Off Road for several weeks, Lisa Westbrook of TUD said in an announcement.

Signs will be at Bell Mooney Road and at Stent Cut-Off Road in Jamestown directing drivers to Algerine Road, Westbrook said. School bus routes and pickup locations will remain the same.

The project started in November. Workers are installing about 12,000 feet of water main, a distance equivalent to 2.27 miles. Staff with TUD say the Quartz-Stent water main extension is necessary because more than 30 homes in the Quartz-Stent area have experienced well failures due to inadequate water quantity, water quality and the recent five-year drought.

The pipeline extension is needed in part because in March last year, Tuolumne County Environmental Health Department staff obtained samples of drinking water from private wells in the Stent area that were tested at the state Department of Public Health’s Radiation and Sanitary Laboratory. Elevated levels of nitrates and arsenic were found in some private wells.

Liza Ortiz, Tuolumne County’s health officer, said a total of 12 households had abnormal levels and residents of those households were told to drink bottled water. Residents of many homes in the Quartz-Stent area are participating in Tuolumne County’s well assistance program, which is temporary, according to TUD.

Tuolumne Utilities District staff have received more than $1.6 million in grant funding for the Quartz-Stent water main extension from the Department of Water Resources and the State Water Resources Control Board.

The water main will enable connections to more than 100 properties. Mozingo Construction of Oakdale is contracted to do the work.

The Quartz-Stent water main extension project is expected to be complete by the end of April, Westbrook said.