LEWISTOWN — The following schedule of maintenance activities in Mifflin County, beginning on Monday, according to a news release from the Pennsylvania Department of Transportation.

PennDOT performs year-round maintenance in its mission to provide a safe, efficient transportation system, and the scope of work in Mifflin County for the coming week is as follows:

Bridge Maintenance and Cleaning

• Route 322 westbound between Burnham and the bottom Seven Mountains. Monday and Tuesday. PennDOT will implement single-lane closures while this work is completed.

• Route 322 eastbound between the bottom of Seven Mountains and Burnham. Tuesday through Friday.

Pennsylvania has some of the oldest bridges in the country, with an age of more than 50 years on average. Preventive maintenance is vital in extending the life of the structures. As such, PennDOT maintenance crews perform some bridge deck patching and structural repairs.

Manual Patching

• Route 4006 (Back Mountain Road) between Route 305 in Union Township and Route 1005 (Old US 322 Highway) in Armagh Township. Monday. Flaggers in the roadway will provide traffic control during daylight hours.

• Route 655 (Main Street) between the Huntingdon-Mifflin County line in Menno Township and Route 1005 (Old US 322 Highway) in Armagh Township. Monday through Wednesday.

• Route 522 (Walnut Street) between Route 3002 (Logan Street) in Lewistown Borough and Fox Avenue in Derry Township. Thursday and Friday;

Route 4013 (Ferguson Valley Road) between Strodes Run Road in Granville Township and the Route 322 onramp in Derry Township. Thursday and Friday.

Most permanent pothole patching is completed in the spring/summer when temperatures stay consistently above freezing. If maintenance crews were not repairing potholes, the road surface would break up further and require more expensive corrective measures.

Pipe Replacement and Cleaning

• Route 2004 (Back Maitland Road) between Jack Hollows Road and Wagner Road in Decatur Township. Tuesday, June 3, to Friday, June 6. Flaggers in the roadway will provide traffic control during daylight hours.

• Pipe replacement and cleaning are essential in maintaining water flow around state roadways. Controlling water flow is one of the most important aspects of maintaining pavements. Uncontrolled water flow will damage both the pavement surface and the area under the pavement, which causes deterioration across the length of the pipe.

This schedule is subject to change due to weather conditions, emergencies, or other unforeseen interruptions.

Customers can report road concerns by calling 1-800-FIX-ROAD. If calling after hours, please leave a name and phone number.