Description - History-
Congress acted in 1878 and the U.S. Army Corps of Engineers began the first federally -built lock and dam on the Ohio at Davis Island about five miles below the Point in Pittsburgh. This lock and dam was completed in 1885. The lock was 110 feet wide and 600 feet long and was the largest lock in the world at that time. The dam was composed of wooden bulkheads hinged on the river bottom which could be lowered when the river flow was high. Boats could then pass without using the lock. When the level of the river began to fall, however, the wooden wickets were raised to catch the water and create a pool behind the dam to maintain the level of the river for boats. These wicket dams were eventually built for the entire length of the Ohio River from Pittsburgh to Cairo, Illinois. The last one, Dam 53 at Cairo, was installed in 1929. It and Dam 52 are the only wicket dams remaining on the Ohio River.
Climate - Illinois experiences four distinct seasons with varying weather throughout the year. Winter can be very cold. The highest humidity of the year occurs during this season averaging 70 to 75 percent. Average low temperatures in January dip to 20 degrees F with highs near 35 degrees F. Spring temperatures are mild with humidity below 70 percent. Temperatures during this season average between 32 and 50 degrees F. Summer is usually hot and humid in this Midwest state. Low temperatures remain in the low sixties with high temperatures near 90 degrees F. The highest rainfall of the year occurs during the summer months. Fall is an excellent time to visit the state with low humidity and rainfall and moderate temperatures.
Locks and Dam No. 52 is located on the Ohio River about 1.5 miles downstream of Brookport, Illinois, at mile 939 below Pittsburgh, Pennsylvania.