 In total , the dam would have consisted of a concrete gravity structure with a structural height of 510 feet ( 155 m ) and a hydraulic height of 430 feet ( 131 m ) . At the elevation of 660 feet ( 201 m ) , the dam would have stretched for 4 @,@ 700 feet ( 1 @,@ 430 m ) from north to south . On the south bank would have been a concrete gravity spillway with a crest at elevation 600 feet ( 183 m ) and a maximum flow of 603 @,@ 000 cubic feet per second ( 17 @,@ 100 m3 / s ) at maximum pool elevation . The power facilities would have consisted of twenty @-@ two 266 @,@ 000 kilowatt units and two 10 @,@ 000 kilowatt service units . 
