1937 The Federal Flood Control Act passes on June 22. The act provides funding and direction for the construction of a system of 14 reservoir dams in the Ohio River basin for the protection of Pittsburgh and the reduction of flood heights in the Ohio Valley generally.								1945 WWII ends August 15, a day known as VJ day.				1960 John F. Kennedy is president.		1961		The book Silent Spring by Rachel Carson highlights the dangers of DDT to wildlife.				1969 First man on the moon.
	1937 Pennsylvania passes the Clean Streams Law which establishes once and for all that water pollution is a public nuisance.		1937 Cathedral of Learning finished. Started in 1926.		1939 All nine locks and dams are now completed on the Allegheny River, extending 62 miles up from its mouth. Locks and dams are designed with the ability to maintain consistent, predictable river heights chiefly for river-based transport of barges and, at the time, steamboats.		1940 Crooked Creek Reservoir, the first one built in PA by the Corps of Engineers, as outlined in 1912 Flood Commission Report.				1950 City of Pittsburgh population peaks at 676,806.		1960 Allegheny County population peaks at 1,628,587.				1964 Flooding behind newly constructed Kinzua Dam drowns 160-year old Seneca reservation. In this 1910 photo, the red line above shows the proposed height of the dam.