Changes

==Rivers==

==Rivers==

In 1908, the Pittsburgh Chamber of Commerce established a Flood Control Commission which developed a plan calling for nine reservoirs at the headwaters of the Allegheny, Monongahela, and Ohio rivers. The plan was endorsed at the national level by Progressives who wanted centralized inland waterway development under a single authority. This approach was rejected by Congress and the Army Corps of Engineers. However, in the 1920's funds were appropriated for studies of the flood problem in the upper Ohio valley and the Corps was instructed to broaden its approach to flood control to include the use of reservoirs. On the eve of the great Pittsburgh flood of 1936, a bill providing for nine reservoirs above Pittsburgh had passed the House of Representatives and was being debated in the Senate Commerce Committee. The flood provided the necessary impetus to obtain funds for the first five reservoirs.  

In 1908, the Pittsburgh Chamber of Commerce established a Flood Control Commission which developed a plan calling for nine reservoirs at the headwaters of the Allegheny, Monongahela, and Ohio rivers. The plan was endorsed at the national level by Progressives who wanted centralized inland waterway development under a single authority. This approach was rejected by Congress and the Army Corps of Engineers. However, in the 1920s funds were appropriated for studies of the flood problem in the upper Ohio valley and the Corps was instructed to broaden its approach to flood control to include the use of reservoirs. On the eve of the great Pittsburgh flood of 1936, a bill providing for nine reservoirs above Pittsburgh had passed the House of Representatives and was being debated in the Senate Commerce Committee. The flood provided the necessary impetus to obtain funds for the first five reservoirs.  

In the 1930s, Pittsburgh's efforts to obtain federal funds for flood control continued; however, the characteristic unified leadership of upper class individuals disintegrated. This earlier pattern of unified elite leadership reemerged in 1943 when the Allegheny Conference on Community Development (ACCD) assumed responsibility for the overall economic development of the area. The Chamber of Commerce, operating as an arm of the ACCD, continued to lead the campaign for additional federal flood control money. There was a continuing relation between efforts to attract private capital for Renaissance Pittsburgh and the flood control program. In 1960, construction began on the Allegheny Reservoir, the largest and last of nine dams.<ref>Roland M, Smith, "The Politics of Pittsburgh Flood Control, 1936-1960," ''Pennsylvania History'' 1977 44(1): 3-24,</ref>

In the 1930s, Pittsburgh's efforts to obtain federal funds for flood control continued; however, the characteristic unified leadership of upper class individuals disintegrated. This earlier pattern of unified elite leadership reemerged in 1943 when the Allegheny Conference on Community Development (ACCD) assumed responsibility for the overall economic development of the area. The Chamber of Commerce, operating as an arm of the ACCD, continued to lead the campaign for additional federal flood control money. There was a continuing relation between efforts to attract private capital for Renaissance Pittsburgh and the flood control program. In 1960, construction began on the Allegheny Reservoir, the largest and last of nine dams.<ref>Roland M, Smith, "The Politics of Pittsburgh Flood Control, 1936-1960," ''Pennsylvania History'' 1977 44(1): 3-24,</ref>