Effect of proposed flood control program in the Ohio Valley on existing river pollution. Included are reviews such as: Summary of existing pollutional conditions in the Ohio River, probable effect on existing pollution of flood control program, effects of increased low water flows in Pittsburgh area, effects of increased low water flow in tributaries polluted with acid drainage, effect of increased low water flows on conditions above and below communities outside zone of acid drainage, effect of increased low water flow on tributary streams not affected by acid drainage, effect of increased low water flow on the pollution at water works intakes.