General Project Information : Key Physical Information for Lake Columbia
Key Physical Information for Lake Columbia

Normal Pool Elevation	315 ft NGVD (10,121 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
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