PennDOT District 11 is announcing improvement work on Route 4013 (Old Darlington Road) in South Beaver Township, Beaver County, will begin Monday, June 25 weather permitting. Single-lane alternating traffic will occur weekdays from 8 a.m. to 4 p.m. on Old Darlington Road between Wallace Run Road (Route 551) and Marlene Road.  Crews will conduct milling and paving operations, concrete and base repairs, and drainage improvements through August.  Other miscellaneous construction activities through mid-September. The work is part of a $5.19 million group paving contract.  Lindy Paving will conduct the work.