Lanes on four Warren County roadways may be restricted as PennDOT crews work to preserve four metal pipe culverts in the county.

PennDOT said on Tuesday that work started on Monday at Miller Hill Road just north of 957 in Farmington Township.

One additional culvert – on Rt. 957 near Miller Hill Road – is located in Farmington while two – Route 59 near the Kinzua Dam and Rt. 346 near the New York state line are located in Mead Township.

“The pipes will receive shotcrete lining, a process that essentially sprays concrete at high velocity using compressed air, a hose, and nozzle. The concrete lining is expected to extend the service life of each pipe by an estimated 50 years,” PennDOT said.

PennDOT officials explained that an “ongoing initiative to rehabilitate aging and deteriorating corrugated metal pipes” was launched in 2017 throughout the region.

“It has been used to rehabilitate 19 pipes in Crawford, Forest, Mercer, Venango and Warren counties,” PennDOT said. “The contractor is Proshot Concrete, Inc., of Florence, Alabama. The contract cost is $502,323, which is to be paid entirely with state funds.”

In 2017, PennDOT District 1 launched an ongoing initiative to rehabilitate aging and deteriorating corrugated metal pipes that carry streams under roads in the northwestern region. It has been used to rehabilitate 19 pipes in Crawford, Forest, Mercer, Venango, and Warren counties.

PennDOT said the work is expected to be completed by October 11 and noted no detours are expected “though motorists may encounter lane restrictions controlled by flaggers.”