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Water-Year Summary for Site 03007800

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  • Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
  • For water years 2014 onward, choose a water year and parameter and an on-demand Water-Year Summary report will be generated.
  • For water years 2006 through 2013, choose a water year and an Annual Water Data Report will be provided.
  • For water years 2005 and earlier, Annual Water Data Reports may be available in digital format.
  • Not all sites have reports available for every water year.
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.)  

Water year 2019: 2019-10-01 to 2020-09-30
 

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USGS Water-Year Summary 2019
03007800 ALLEGHENY RIVER AT PORT ALLEGANY, PA
LOCATION - Lat 41°49'07", long 78°17'35" referenced to North American Datum of 1927, McKean County, PA, Hydrologic Unit 05010001, on right bank 40 ft upstream from bridge on U.S. Highway 6 at Port Allegany, 1.1 mi upstream from Twomile Creek, 1.4 mi downstream from Allegheny Portage Creek, at river mile 285.5.
DRAINAGE AREA - 248 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 1974 to current year. Discharge measurements available from U.S. Army Corps of Engineers March 1971 to October 1974.
GAGE - Water-stage recorder. Datum of gage is 1,454.88 ft above National Geodetic Vertical Datum of 1929 (from benchmark). Satellite telemetry at station.
COOPERATION - Station established and maintained by the U.S. Geological Survey. Funding for this station provided by the U.S. Army Corps of Engineers, Pittsburgh District, the New York State Department of Environmental Conservation and the U.S. Geological Survey.
REMARKS - Records for water year 2014 are good except those for estimated daily discharges, which are poor. Records for water year 2015 are good except those for estimated daily discharges, which are poor. Records for water year 2017 are good. Records for water year 2018 are good except those for estimated discharges, which are poor. 
EXTREMES OUTSIDE PERIOD OF RECORD - Flood of Jun 23, 1972 reached a stage of at least 17.5 ft, discharge, 21,700 ft³/s, from U.S. Army Corps of Engineers indirect discharge measurement. Actual peak discharge may have been greater.
WATER-QUALITY RECORDS
PERIOD OF RECORD - October 2010 to current year.
PERIOD OF DAILY RECORD - SPECIFIC CONDUCTANCE: November 2010 to current year. DISSOLVED OXYGEN: July 2011 to current year (seasonal operation May to October). WATER TEMPERATURE: November 2010 to current year. pH: July 2011 to current year (seasonal operation May to October).
COOPERATION - Water-quality samples were collected as part of the Pennsylvania Department of Environmental Protection Water-Quality Network (WQN) with cooperation from the Pennsylvania Department of Environmental Protection.
INSTRUMENTATION - Continuous water-quality monitor interfaced with a data collection platform with 15-minute recording interval.
REMARKS -

As of October 2013, results from discrete water quality samples collected at this site are available through the U.S. Geological Survey National Water Information System web interface on the "Water Quality for the Nation" webpage. Analyses for pH, water temperature, specific conductance, and dissolved oxygen were performed on site.
All other sample analyses were performed at the Pennsylvania Department of Environmental Protection laboratory in Harrisburg, PA. Occasionally, values for filtered parameters may exceed values for the corresponding unfiltered parameter. These results are within the limits of analytical precision and methods.
Continuous data collection for pH and dissolved oxygen discontinued in winter months. Other interruptions in the records were due to equipment malfunctions or erroneous data.

Historically, water temperature below 0 degrees Celsius were not reported. Water temperature sensors now have the ability to accurately read water temperatures below 0 degrees Celsius.

Cross-sectional water quality data available upon request.

For water year 2015, records for water temperature, specific conductance, and pH are rated good. Records for dissolved oxygen are good, except for October 1 and October 5-31, which are fair, and October 2-4 and April 1-7, which are poor.

For Water Year 2016, records for water temperature are rated good. Records for specific conductance are rated good, except for October 15-18 and June 8-24, which are fair, and for October 19 to November 11, which are poor. Records for dissolved oxygen are rated good, except for May 18, which are poor. Records for pH are rated good, except for March 15-May 18, which are poor.

For water year 2017, records for water temperature are rated good. Records for specific conductance are rated good, except for June 12-13 and June 26, which are fair, and June 14-22 and June 27-28, which are poor. Records for pH are fair, except for September 20-30, which are poor. Records for dissolved oxygen are fair, except for June 6-28, which are poor.

For water year 2018, records for water temperature are rated good. Records for specific conductance are rated good, except for Mar 12 to Jun 25, which are fair. Records for pH are good, except for Mar 12 to Jun 25, which are fair. Records for dissolved oxygen are fair, except for Mar 12 to Jun 25, which are poor.

EXTREMES FOR PERIOD OF DAILY RECORD - SPECIFIC CONDUCTANCE: Maximum, 208 microsiemens per centimeter, Feb 20, 2014; minimum, 41 microsiemens per centimeter, Dec 1, 2010. WATER TEMPERATURE: Maximum, 30.6°C, July 22, 2011; minimum, -0.4°C, many days during winter periods. PH: Maximum, 8.1 standard units, Aug 29, 2015; minimum, 6.2 standard units, May 26, 29, 30, 2012, Jun 2, 6, 2012, Jun 26, 2014. DISSOLVED OXYGEN: Maximum, 14.1 mg/L, Apr 2, 2015; minimum, 5.3 mg/L Jul 22, 24, 2011, Jul 9, 2012.