LOCATION.--Lat 41°41'44", long 94°22'53" referenced to North American Datum of 1927, in SW 1/4 SE 1/4 NE 1/4 sec.31, T.80 N., R.30 W., Guthrie County, IA, Hydrologic Unit 07100007, in gate control building of dam on Middle Raccoon River, 0.5 mi upstream from State Highway 44, 1.0 mi west of Panora, 4.4 mi upstream from Bay Branch, and 67.7 mi upstream from mouth of Raccoon River. (map)

DRAINAGE AREA.--433 mi².

SURFACE-WATER RECORDS

PERIOD OF RECORD.--Stage-only records from May 1979 to current year.

GAGE.--Water-stage recorder. Datum of gage is 1,000.00 ft above National Geodetic Vertical Datum of 1929.

REMARKS.--Lake is formed by earthfill dam with 100-ft bascule gate and concrete chute spillway, and 300-ft earthen emergency spillway. Low-flow outlet is 30-in conduit and gate valve through dam. Dam was completed in August 1970, with storage beginning April 27, 1971. Total storage, 60,000 acre-ft, surface area, 2,900 acres, at top of dam, elevation 1,068 ft. Storage unknown at top of spillway, elevation 1,048 ft. Normal storage, 19,700 acre-ft, surface area, 1,270 acres, with bascule gate closed, elevation 1,045 ft. Dead storage unknown with bascule gate open, elevation 1,036 ft. Present lake classification is utility (industrial), but lake is also used for recreation.

Advanced Hydrologic Prediction Service

Lake Panorama Association

Cooperative Water Program