USGS Water-Year Summary 2024

03039041 ALLEGHENY RIVER BELOW LOCK AND DAM 5 NEAR FREEPORT, PA

LOCATION - Lat 40°41'08", long 79°40'07" referenced to North American Datum of 1983, Armstrong County, PA, Hydrologic Unit 05010006, on right bank located 450 feet downstream from low head dam at Lock 5, 1,333 ft upstream of mouth with the Kiskiminetas River, and 5.17 miles downsteam of Allegheny Lock and Dam No. 6 and 0.4 miles east of State Route 128.

DRAINAGE AREA - 9,340 mi².

REVISIONS HISTORY - Revisions: The datum of gage was erroneously reported as 740 ft above National Geodetic Vertical Datum of 1929 prior to February 15, 2024.

SURFACE-WATER RECORDS

PERIOD OF RECORD - September 2016 to current year.

GAGE -

Water stage recorder with reference staff gage. Datum of gage is 735.9 ft above North American Vertical Datum of 1988.  Prior to February 15, 2024, the datum of gage was reported as 736.4 ft or erroneously reported as 740 ft above National Geodetic Vertical Datum of 1929 depending on source.  Telemetry at site.

COOPERATION - Station established and maintained by the U.S. Geological Survey in cooperation with the U.S. Army Corps of Engineers, Pittsburgh District.

REMARKS -  

WATER-QUALITY RECORDS

PERIOD OF DAILY RECORD - WATER TEMPERATURE: July 2010 to November, 2017, (seasonal operation, June to November). DISSOLVED OXYGEN: July 2010 to November, 2017, (seasonal operation, June to November). SPECIFIC CONDUCTANCE: July 2013 to November, 2017, (seasonal operation, June to November).