not positive,been years since i was there last. take rt. 4 into germantown. at main drag ( central ) go west into town. cross bridge & germantown damn is on the right. decent holes. to work the best holes from here you would have to go downstream, working your way down. if you want to work your way upstream ( wadding ) continue south on rt. 4 into posttown. only 3 or 4 miles south of germantown.turn left at the root beer stand and you will cross the creek again. hope this helps. quit going after i got my first boat back in 89.
Oh yeah Twin Creek. That brings back memories. Actually I still hit it a couple times a year. But I go out towards Gratis, gets less pressure than it does around Germantown. Take 725 west out of Germantown and go about 5 miles, turn right on Preble Countly Line Rd. You'll hit twin creek a few miles down. You can go upstream or downstream from there - equally good. I've always used white maribu jigs, catch smallmouth, rockbass and bluegill all day.