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[!] Over the next year, the USGS Pennsylvania Water Science Center will be updating the geodetic vertical elevation (gage datum) for many locations. Click HERE for additional information including a current list of streamgages with upcoming datum changes. This update in gage datum does not affect the location of the streamgage, nor the observed local gage height or discharge recorded at the streamgage.




USGS 402452078271301 BA 74 Blair County Observation Well

PROVISIONAL DATA SUBJECT TO REVISION

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Station gage imageSTATION.--402452078271301 BLAIR COUNTY, local well number BA74
LOCATION.--Lat 40`24'52.2", long 78`27'12.2", Hydrologic Unit 02050302, at Allegheny Portage Railroad National Historic Site, and southwest of Duncansville.
OWNER.--U.S. Geological Survey.
AQUIFER.--Brallier Formation, Late Devonian age.
WELL CHARACTERISTICS.--Drilled observation well, diameter 6 in., depth 150 ft, cased to 14 ft, open hole.
INSTRUMENTATION.--Data collection platform with 15-minute recording interval since April 2023; prior, 60-minute recording interval since December 2000. Satellite telemetry at station.
DATUM.--Elevation of land surface is 1,134 ft above North American Vertical Datum of 1988, from Lidar. Measuring point: Top of casing, 1.8 ft above land-surface datum 1969-1999; top of recorder shelf, 3.06 ft above land surface datum June 10, 1999 to June 1, 2011; 3.20 ft above land-surface datum June 1, 2011 through Feb 24, 2016; 3.26 ft above land surface datum Feb 24, 2016 to current.
REMARKS.--Daily maximum, minimum, and mean water levels since June 1999 are available from the District Office.
PERIOD OF RECORD.--August 1969 to current year.
COOPERATION.--Funding for the operation of this station is provided by the Pennsylvania Department of Environmental Protection and the U.S. Geological Survey.
This station managed by the PAWSC New Cumberland Office.

Available Parameters Period of Record
  
1969-08-13  2024-04-17








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