USGS 01427207 DELAWARE RIVER AT LORDVILLE NY

PROVISIONAL DATA SUBJECT TO REVISION

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> Site Information
LOCATION.--Lat 41°52'02.2", long 75°12'49.5" referenced to North American Datum of 1983, Wayne County, PA, Hydrologic Unit 02040101, on right bank at Lordville-Equinunk Interstate Bridge at Lordville, 9.7 mi southeast of Hancock.
DRAINAGE AREA.--1,590 mi².
PERIOD OF RECORD.--Maximum only--June 2006, July 2006 to current year.
REVISIONS HISTORY.--WDR NY-82-1: Drainage area.
GAGE.--Water-stage recorder and crest stage gage. Datum of gage is 835.00 ft above NGVD of 1929 and 834.51 ft above NAVD of 1988.
REMARKS.--Entire flow from 371 mi² of drainage area controlled by Pepacton Reservoir (station 01416900), and entire flow from 454 mi² of drainage area controlled by Cannonsville Reservoir (station 01424997). Part of flow from these reservoirs diverted for New York City municipal supply. Remainder of flow (except for conservation releases and spill) impounded for release during periods of low flow in the lower Delaware River basin, as directed by the Delaware River Master.
Water Years 2014-23: Records good except those for estimated daily discharges, which are poor.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge 126,000 ft³/s, June 28, 2006, gage height, 28.87 ft, from floodmark, from rating curve extended above 39,000 ft³/s on basis of runoff comparisons with nearby stations; minimum discharge, 371 ft³/s, Sept. 6, 2008, Sept. 28, 2010; minimum gage height, 5.37 ft, Sept. 28, 2010.
EXTREMES OUTSIDE PERIOD OF RECORD.--Maximum discharge, 95,600 ft³/s, Sept. 18, 2004, gage height, 23.53 ft, from floodmark, and 102,000 ft³/s, Apr. 3, 2005, gage height, 25.20 ft, from floodmark, both by runoff comparisons with nearby stations.
PERIOD OF DAILY RECORD1.--WATER TEMPERATURE: October 1967 to August 1971, June 1973 to May 1996, July 2006 to current year. SPECIFIC CONDUCTANCE: June 2019 to current year. DISSOLVED OXYGEN: April 2021 to current year. pH: April 2021 to current year. TURBIDITY: April 2021 to current year.
INSTRUMENTATION1.--Multi-parameter water-quality sonde measures water temperature, specific conductance, dissolved oxygen, pH, and turbidity at 15-minute intervals since April 2021. From June 1987 to June 1989, water-temperature satellite telemeter provided one-hour-interval readings. From June 1973 to November 1989, water-temperature recorder provided one-hour-interval readings. Prior to August 1971, water-temperature recorder provided continuous recordings.
REMARKS1.--Temperature readings prior to Oct. 1, 2007, rounded to the nearest 0.5 °C. Water temperature is affected by release of water from upstream reservoir.
EXTREMES FOR PERIOD OF DAILY RECORD1.--WATER TEMPERATURE: Prior to Oct. 1, 2007--Maximum (water years 1968-70, 1973, 1975-86, 1989, 1991-95, 2007), 30.5 °C, June 16, 1976, July 10, 1981; minimum (water years 1968-71, 1974, 1977-78, 1980-96, 2007), 0.0 °C on many days during winter period. WATER TEMPERATURE: After Oct. 1, 2007--Maximum, 27.4 °C, June 10, 2008; minimum, -0.1 °C, Nov. 24, Dec. 12, 25, 26, 2013, Jan. 11, 2014, Jan. 12, 18, Feb. 11, 17, 18, 2016, and many days during 2017-22 winter periods. SPECIFIC CONDUCTANCE: Maximum, 177 uS/cm at 25 °C, Mar. 1, 2021; minimum, 34 uS/cm at 25 °C, Nov. 1, 2019, Oct. 26, 27, 2021, Dec. 18, 19, 2023. DISSOLVED OXYGEN: Maximum, 15.5 mg/l, Feb. 4, 2023; minimum, 7.2 mg/l, May 27, 2021. pH: Maximum, 9.8, May 20, 2021; minimum, 6.4, Oct. 26, 27, 2021. TURBIDITY: Maximum, above 1,000 FNU, Feb. 4, 2022; minimum, 0.3 FNU, May 4, 7, June 29, July 12, 2024.
 

1 Water-Quality Records
> Rating Information
This station managed by the NY Water Science Center Milford.

Available Parameters Available Period
  
2007-10-01  2024-10-03
2006-10-01  2024-10-03
2007-10-01  2024-10-03
2019-06-13  2024-10-03
2021-04-08  2024-10-03
2021-04-08  2024-10-03
2021-04-08  2024-10-03







 (7)
 

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


Temperature, water, degrees Celsius

Most recent instantaneous value: 14.7 10-03-2024   15:00 EST
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Discharge, cubic feet per second

Most recent instantaneous value: 1550 10-03-2024   15:00 EST
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Daily discharge, cubic feet per second -- statistics for Oct 3 based on 18 water years of record more
Min
(2009)
25th
percen-
tile
Median Most Recent
Instantaneous
Value Oct 3
Mean 75th
percen-
tile
Max
(2019)
780 873 1250 1550 2310 3180 7890


Gage height, feet

Most recent instantaneous value: 6.65 10-03-2024   15:00 EST
Graph of  Gage height, feet

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Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius

Most recent instantaneous value: 80 10-03-2024   15:00 EST
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Dissolved oxygen, water, unfiltered, milligrams per liter

Most recent instantaneous value: 11.6 10-03-2024   15:00 EST
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pH, water, unfiltered, field, standard units

Most recent instantaneous value: 8.2 10-03-2024   15:00 EST
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Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +-2.5 degrees, formazin nephelometric units (FNU)

Most recent instantaneous value: 4.1 10-03-2024   15:00 EST
Graph of  Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +-2.5 degrees, formazin nephelometric units (FNU)

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