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.
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