USGS Water-Year Summary 2018
14181410 BIG CLIFF DAM TAILWATER NEAR NIAGRA, OR
LOCATION - Lat 44°45'05.35", long 122°17'00.16" referenced to North American Datum of 1983, in SW 1/4 NE 1/4 sec.35, T.9 S., R.4 E., Marion County, OR, Hydrologic Unit 17090005, at powerhouse near right end of Big Cliff Dam on North Santiam River, and at mile 58.05.
DRAINAGE AREA - 453 mi².
PERIOD OF RECORD - October 2013 to current year (gage heights only).
GAGE - Water-stage recorder. Datum of gage is NGVD of 1929 (levels by U.S. Army Corps of Engineers).
EXTREMES FOR PERIOD OF RECORD - Maximum gage height, 1,118.22 ft Dec. 30, 2014; minimum, 1,106.82 ft Jan. 4, 2017.