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LOCATION.--Lat 41°21'38", long 92°58'23"
referenced to North American Datum of 1927, in SW 1/4 SW 1/4 SE 1/4
sec.19, T.76 N., R.18 W., Marion County, IA, Hydrologic Unit
07100009, on right bank 0.4 mi downstream from outlet of Red Rock
Reservoir, 2.0 mi southwest of Pella, 2.6 mi upstream from Lake
Creek, and 138.7 mi upstream from mouth. (map)
DRAINAGE AREA.--12,330 mi2.
PERIOD OF RECORD.--Discharge records from October 1992 to current
GAGE.--Water-stage recorder. Datum of gage is 600.00 ft above
National Geodetic Vertical Datum of 1929.
REMARKS.--Flow regulated by Lake Red Rock (station 05488100), 0.4