People who live off Lyons Street northeast of downtown Sonora and people who drive Lyons Street will have a sewer main replacement project to contend with, on Hillcrest Drive between Short Lane and Hope Lane, starting Tuesday and going into August.

The sewer main replacement work is scheduled 7 a.m. to 4 p.m. July 16 to Aug. 9, says Lisa Westbrook, customer and public relations coordinator for Tuolumne Utilities District.

Traffic will be restricted to local motorists only, Westbrook said Monday in an announcement. Motorists allowed in will include delivery trucks, garbage trucks and non-through traffic accessing homes and businesses.

Lyons Street will also be restricted to local traffic only in the area of Palemone Street, Westbrook said. Parking will be restricted on Hillcrest Drive between Short Lane and Hope Lane, and on Lyons Street in the area of Palemone Street.

Residents and motorists should observe parking signs in the area, Westbrook said.

The neighborhood around Lyons and Hillcrest is situated near the bottom of one of Sonora’s steepest hillsides. Hillside homes and streets require site-specific plumbing solutions. Sewer mains on Hillcrest and Palemone are decades old and have reached the end of their useful life, Gaddiel DeMattei, a TUD associate engineer, said Monday. Current sewer mains there have multiple angle fittings that cause clogs and backups.

The plan during the four-week project that starts Tuesday is to replace 140 feet of 4-inch sewer main, increase the size of 180 feet of main from 4 inches to 6 inches, and build a new manhole. Njirich & Sons Inc. of Sonora has been chosen from competitive bids to do the work. The contract is for $95,136.

Contact Guy McCarthy at or 588-4585. Follow him on Twitter at @GuyMcCarthy.