From I-81 take Exit 240 (Bridgewater). Proceed on Rt. 257 3.4 miles west to the Town of Bridgewater. At the stop light of Rt. 257 and Main Street (beside El Charo's) take a right turn and proceed north on Main Street (Rt. 42) for 2.8 miles to Dayton. Turn left onto Rt. 257 in Dayton. Follow Rt. 257 to Rt. 742 six miles west of Dayton. Go straight at the stop sign for 1/2 mile; OES is on the right.