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- Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
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USGS Water-Year Summary 2024
14209250 OAK GROVE FORK AT RIPPLEBROOK CAMPGROUND, OR
LOCATION - Lat 45°04'47.33", long 122°02'34.29" referenced to North American Datum of 1983, Clackamas County, OR, Hydrologic Unit 17090011, Mount Hood National Forest, on right bank and 40 ft downstream from Hwy 224 bridge.
DRAINAGE AREA - 141 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 2010 to current year.
GAGE - Water-stage recorder and crest-stage gage. Elevation of gage is 1,420 ft above NGVD of 1929, from topographic map.
REMARKS - Flow regulated by Timothy Lake (active capacity, 64,450 acre-ft). Low flows are affected at times by diversion to Stone Creek Hydroelectric Project. Diversion upstream from station at Harriet Lake to Oak Grove powerhouse, returns to Clackamas River downstream from station.
EXTREMES FOR PERIOD OF RECORD - Maximum daily discharge, 2,000 ft³/s Jan. 16, 2011; minimum discharge, 13 ft³/s Oct. 27, 28, Dec. 22, 23, 2011.
