LOCATION.-- Lat 42°24'11", long 88°10'57" (NAD of 1927), in SE1/4SE1/4 sec.4, T.45 N., R.9 E., Lake County, Hydrologic Unit 07120006, on east shore of Nippersink Lake, 350 ft upstream from bridge on U.S. Route 12 and 300 ft upstream from railroad bridge in village of Fox Lake, and at mile 106.4.

PERIOD OF RECORD.--

STAGE: October 1939 to current year.

GAGE.-- Water-stage recorder and phone telemeter. Datum of gage is 733.00 ft above NGVD of 1929 (levels by Illinois Department of Transportation). Prior to Dec. 16, 1939, nonrecording gage at same site at datum 2.13 ft higher. Dec. 16, 1939, to Sept. 30, 1971, at datum 2.13 ft higher.

REMARKS.-- Stage regulated by Stratton Lock and Dam (previously known as McHenry Dam).

EXTREMES FOR PERIOD OF RECORD.--

STAGE: Maximum gage height, 8.12 ft, present datum, Apr. 5, 1960; minimum observed, 1.70 ft, Feb. 10, 1972.