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Water-Year Summary for Site 14182500

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  • Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
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Available Parameters
00010 Temperature, water(Max.,Min.,Mean)  
00060 Discharge(Mean)  
00095 Specific cond at 25C(Max.,Min.,Mean)  
00300 Dissolved oxygen(Max.,Min.,Mean)  
00400 pH(Max.,Min.,Med.)  
32295 fDOM, water, in situ(Min.,Max.,Mean)  
32315 Relative fChl, water, in situ(Max.,Min.,Mean)  
32316 fChl, water, in situ(Max.,Min.,Mean)  
32319 fPC, water, in situ(Min.,Max.,Mean)  
32321 Relative fPC, water, in situ(Max.,Min.,Mean)  
63680 Turbidity, Form Neph(Min.,Max.,Med.)  
63680 Turbidity, Form Neph(Min.,Max.,Med.) [(2)]  

Water year 2024: 2024-10-01 to 2025-09-30
 
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USGS Water-Year Summary 2024
14182500 LITTLE NORTH SANTIAM RIVER NEAR MEHAMA, OR
LOCATION - Lat 44°47'30", long 122°34'40" referenced to North American Datum of 1927, in NW 1/4 sec.16, T.9 S., R.2 E., Marion County, OR, Hydrologic Unit 17090005, on left bank, 2.0 mi east of Mehama and at mile 2.0.
DRAINAGE AREA - 112 mi². at cableway, 1.2 mi downstream.
REVISIONS HISTORY - WSP 754: 1932. WSP 1218: 1934, 1936, 1949-50. WSP 1935: Maximum only, 1932-34, 1936, 1938, 1943, 1945-49, 1950(M,P), 1951-53(M), 1954(M,P), 1955(M), 1956(M,P), 1957(M), 1958-59(M,P). WSP 2135: Drainage area.
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 1931 to current year. Records for July to September 1924 and July to September 1931, at site 4 mi upstream not equivalent as a result of differences in drainage areas.
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 655.41 ft above NGVD of 1929. Prior to June 12, 1948, nonrecording gage at about same site and datum.
REMARKS - No regulation or diversion upstream from station. All records given herein are for cableway measuring site 1.2 mi downstream from gage, and for wading measuring site 0.4 mi downstream from gage. Continuous water-quality data were collected for period April 2000 to December 2015.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 36,000 ft³/s Dec. 22, 1964, gage height, 16.73 ft, from rating curve extended above 17,000 ft³/s; minimum discharge, 13 ft³/s Aug. 30, 1961.
WATER-QUALITY RECORDS
PERIOD OF DAILY RECORD -

SPECIFIC CONDUCTANCE: April 2000 to December 2009, March 2011 to December 2015 (seasonal records only), July 2021 to current year.

pH: June 2000 to December 2009, March 2010 to December 2015 (seasonal records only), July 2021 to current year.

WATER TEMPERATURE: July 1985 to September 1986, April 2000 to December 2015, June 2021 to current year.

DISSOLVED OXYGEN: January 2009 to December 2009, June 2021 to current year.

TURBIDITY: April 2000 to December 2015, June 2021 to current year.

INSTRUMENTATION - Water-quality monitor. Any use of trade, product, or firm names in this publication is for descriptive purposes only and does not imply endorsement by the U.S. Government.
REMARKS - TURBIDITY: Data collected using a YSI EXO2 sonde. Manufacturer's stated accuracy is the greater of +/- 2 percent of reading or 0.3 Formazin Nephelometric Units (FNU) for 0-999 FNU, and +/- 5 percent for 1,000-4,000 FNU. Prior to December 2015, data was collected using a YSI 6026 turbidity sensor. Manufacturer's stated accuracy is the greater of +/- 5 percent or 2 FNU. FNU values below 10 are reported to nearest 0.1 FNU. Negative recorded values are reported as 0.0 FNU. Chemical analyses collected at this location are available via NWISWeb. Additional parameters collected at this location are available via NWISWeb.
EXTREMES FOR PERIOD OF DAILY RECORD -

SPECIFIC CONDUCTANCE: Maximum, 58 microsiemens Oct. 12, 2015; minimum, 14 microsiemens Nov. 14, 2001, April 14, 2002.

pH: Maximum, 9.0 units Aug. 14, Sept. 26, 2021; minimum, 6.0 units Nov. 7, 2006.

WATER TEMPERATURE: Maximum, 29.1°C July 29, 2009; minimum, -0.1°C Dec. 8, 9, 2013.

DISSOLVED OXYGEN: Maximum, 14.6 mg/L Dec. 8, 9, 2009; minimum, 7.1 mg/L Aug. 12, 13, 2021.

TURBIDITY: Maximum, 1160 FNU Dec. 15, 2006; minimum, <1 FNU on many days each year.