(Powder Mill, 1918) KCSRR across East Fork Wood River in East Alton, Madison County, IL. IL3 N. (curves W.) 1.9 miles from jct with IL143, E. (sharp right) on St. Louis Av. 0.3 miles, left on Main St. 0.25 miles, N. (left) on Shamrock St. (becomes Powder Mill Rd.) 0.45 miles to the bridge on the E. side of the road. (4-12-10, N38 53.354 W90 06.464) Photos by Jack & June Schmidt.