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04209000 Chagrin River at Willoughby, OH LOCATION.--Lat 41°37'51", long 81°24'13", Lake County, OH, Hydrologic Unit 04110003, on left bank, 50 ft downstream from remains of city waterworks dam, 500 ft downstream from East Branch, 1 mi southeast of Willoughby, and 5 mi upstream from mouth. DRAINAGE AREA.--246 mi2. PERIOD OF RECORD.--July 1925 to November 1935, October 1939 to 1984, March 25, 1988 to September 1994, October 1995 to September 1996, October 1997 to October 1999, October 2001 to current year. (July 1925 to September 1932 monthly runoff in inches, adjusted for diversion, published in WSP 1307; previously published runoff was unadjusted and should not be used). REVISED RECORDS.--WSP 1084: 1929(M), 1931(M). WSP 1307: 1926-28(M), 1930(M), 1932-35(M), 1942(M). WSP 1912: Drainage area. WDR OH-04-02: 2003(M). See also PERIOD OF RECORD. REMARKS.--Water diverted 200 ft upstream from station for municipal supply of City of Willoughby until 1988. Water-quality and sediment data formerly collected at this site.
Value May 28