Facts & Statistics
Blackburn Crossing Dam
Top of Dam Elevation:
Rolled Earth Fill with impervious core and compacted pervious outer zones
5,720 feet (including spillway)
20 to 21.3 feet
847 square miles total
Capacity at 348 ft-msl:
Capacity at 350 ft-msl:
Capacity at 354 ft-msl:
Capacity at 361 ft-msl:
Uncontrolled Concrete Ogee Weir
East side of dam
8,430 cfs approx.
20,000 cfs approx.
60,000 cfs approx.
132,000 cfs approx.
Two 5x7 foot gates connected to 8.5 foot diameter concrete conduit
Two 3-foot diameter by-pass outlets for low flow
Center of dam
298.0 feet-msl for 8.5 ft conduit
309.5 feet-msl (lowest slide gate)
312.5, 322.5 and 332.5 ft-msl for other slide gate
Top of Conservation Pool Elevation:
Capacity at Conservation Pool:
Capacity at Top of Dam:
Formerly 411,840 acre feet