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ALL DATA ARE EASTERN STANDARD TIME

USGS 01433500 MONGAUP RIVER NEAR MONGAUP NY

PROVISIONAL DATA SUBJECT TO REVISION

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LOCATION.--Lat 41°27'41", long 74°45'32" referenced to North American Datum of 1983, Sullivan County, NY, Hydrologic Unit 02040104, on right bank 300 ft downstream from powerplant, 0.5 mi downstream from Bush Kill, and 2.8 mi upstream from mouth and Mongaup.
DRAINAGE AREA.--200 mi2.
PERIOD OF RECORD.--August 1939 to March 1995, October 2013 to current year.
REVISED RECORDS.--WDR NY-71-1: 1970. WDR NY-81-1: 1980. WDR NY-82-1: Drainage area.
GAGE.--Water-stage recorder and crest-stage gage. Datum of gage is 625.05 ft above NGVD of 1929 (levels by Orange and Rockland Utilities, Inc.). Prior to July 6, 1956, water-stage recorders at sites 25 ft upstream on Rio tailrace and 200 ft upstream on natural channel, at datum 4.0 ft higher.
REMARKS.--Entire flow regulated by powerplant except for runoff from about 7 mi2 of drainage area downstream from Rio Dam, and during periods of spill from Rio Reservoir. Flow also regulated by storage in Cliff Lake (station 01433200), Swinging Bridge Reservoir (station 01433000), and Toronto Reservoir (station 01433100) and small reservoirs upstream from station. Water Years 2014-16: Records fair.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 16,100 ft3/s, Aug. 19, 1955, gage height, 15.22 ft, present datum, from rating curve extended above 6,900 ft3/s; minimum daily, 6 ft3/s, Oct. 1, 1939, minimum instantaneous discharge not determined.
EXTREMES OUTSIDE PERIOD OF RECORD.--Maximum discharge, about 10,000 ft3/s, Apr. 3, 2005, gage height, 11.9 ft, from floodmark in gage well.
PERIOD OF DAILY RECORD1.--SPECIFIC CONDUCTANCE: October 2013 to current year.
WATER TEMPERATURE: October 2013 to current year.
pH: October 2013 to current year.
DISSOLVED OXYGEN: October 2013 to current year.
INSTRUMENTATION1.--A continuous water-quality monitor with water temperature, specific conductance, pH, and dissolved oxygen provides 15-minute-interval readings.
REMARKS1.--Interruption of record was due to malfunction of recording instrument.
EXTREMES FOR PERIOD OF DAILY RECORD1.--SPECIFIC CONDUCTANCE: Maximum, 204 ìS/cm at 25 °C, July 1, 2015, but may have been higher during period of instrument malfunction; minimum, 104 ìS/cm at 25 °C, Oct. 28, 2013.
WATER TEMPERATURE: Maximum, 23.4 °C, June 26, 2014; minimum, 0.5 °C, Feb. 8, 17, Mar. 1, 4, 2014.
pH: Maximum, 8.8, Jan. 26, 31, 2015; minimum, 6.1, July 2, 2016.
DISSOLVED OXYGEN: Maximum, 15.8 mg/L, Feb. 14, 18, 19, 22, 23, Mar. 3, 5, 2016; minimum, 3.3 mg/L, Sept. 22, 2015.
1 Water-Quality Records

Peak Flow and Stage Information

Gage PhotoStation image

 

This station managed by the NY Water Science Center Troy.

Available Parameters Available Period
All 8 Available Parameters for this site
  
00010 Temperature, water 2013-10-01  2017-06-25
00060 Discharge 1990-10-01  2017-06-25
00065 Gage height 2017-02-25  2017-06-25
00065 Gage height [backup] 2017-02-25  2017-06-25
00095 Specific cond at 25C 2013-10-01  2017-06-25
00300 Dissolved oxygen 2013-10-01  2017-06-25
00301 Diss oxygen,%saturtn 2017-02-25  2017-06-25
00400 pH 2013-10-01  2017-06-25

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Summary of all available data for this site
Instantaneous-data availability statement


Discharge, cubic feet per second

Most recent instantaneous value: 139 06-25-2017   21:15 EST
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Daily discharge, cubic feet per second -- statistics for Jun 25 based on 58 years of record more
Min
(1993)
25th
percen-
tile
Most Recent
Instantaneous
Value Jun 25
Median Mean 75th
percen-
tile
Max
(1972)
24.0 68 139 192 268 364 2090


Gage height, feet

Most recent instantaneous value: 1.49 06-25-2017   21:15 EST
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Gage height, feet, [backup]

Most recent instantaneous value: 1.48 06-25-2017   21:15 EST
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