Key Physical Information for Lake Columbia

Normal Pool Elevation 315 ft NGVD (10,133 acres)
Fee simple purchase 318 ft NGVD (11,500 acres)
Emergency spillway elevation 324 ft NGVD
2 year flood elevation 317.12 ft NGVD
5 year flood elevation 318.57 ft NGVD
10 year flood elevation 319.69 ft NGVD
25 year flood elevation 320.77 ft NGVD
50 year flood elevation 321.72 ft NGVD
100 year flood elevation 322.59 ft NGVD
500 year flood elevation 326.65 ft NGVD
Probable maximum flood elevation
(Equals 41" of rain in 72 hours)
334.08 ft NGVD
Top of dam 336 ft NGVD
Dam length 6,800 feet
Dam height
(from stream bed)
67 feet
Dam footprint 164 acres
Total volume of above-grade fill in dam 3.6 million cubic yards
Reservoir volume at 315 NGVD 195,500 acre feet
Emergency spillway width 1,100 feet
Shoreline length 94.5 miles
Drainage Area 384 square miles