(ABS, 100000 gal) S. of Mt. Sterling, Mt. Sterling Township, Brown County, IL. IL99 S. 0.7 miles from jct with US24 in Mt. Sterling, W. (curves S.) on IL107 1.4 miles, E. on CR775 0.4 miles to the tower on the N. side of the road. (N39 57.258 W90 44.992) Photos 4-9-10.