The 4,500-square-foot facility, expected to be done by the end of the year, will have 12 fueling stations and operate around the clock.
Stewart & Tate did not disclose cost of the construction.
Turkey Hill Minit Markets is based in Manor Township, but the convenience store chain is in the portfolio of Ohio-based The Kroger Co. The chain, which is separate from the nearby dairy operation, has more than 260 stores in Pennsylvania, Ohio and Indiana.