USGS Water-Year Summary 2020
06914995 HILLSDALE LAKE NEAR HILLSDALE, KS
LOCATION - Lat 38°39'33", long 94°53'54" referenced to North American Datum of 1927, in SE 1/4 NW 1/4 SW 1/4 sec.17, T.16 S., R.23 E., Miami County, KS, Hydrologic Unit 10290102, in control tower at dam on Big Bull Creek, 2.5 mi west of Hillsdale, and at mile 18.2.
DRAINAGE AREA - 144 mi².
PERIOD OF RECORD - May 1982 to current year.
GAGE - Water-stage recorder. Datum of gage is NGVD of 1929 (U.S. Army Corps of Engineers bench mark).
EXTREMES FOR PERIOD OF RECORD - Maximum elevation, 928.49 ft, Oct. 20, 1986, contents, 141,900 acre-ft; minimum elevation since conservation pool first filled, 904.91 ft, Dec. 14, 1987, contents, 33,740 acre-ft.