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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.



[!] ICE EFFECTS ON STREAMFLOW -- During cold weather, stage and discharge values may be affected by ice at some streamgages. Streamgages experiencing ice conditions will have the discharge record temporarily disabled to prevent the display of erroneous discharge values. Display of discharge record will resume when it is determined that ice conditions are no longer present. Adjustment of data affected by ice can only be done after detailed analysis.




USGS 01473000 Perkiomen Creek at Graterford, PA

PROVISIONAL DATA SUBJECT TO REVISION

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Station gage imageSTATION.--01473000 PERKIOMEN CREEK AT GRATERFORD, PA
LOCATION.--Lat 40`13'46", long 75`27'07", Montgomery County, Hydrologic Unit 02040203, on left bank 1,650 ft upstream from highway bridge at Graterford, 0.5 mi upstream from Lodel Creek, and 2.5 mi north of Collegeville.
DRAINAGE AREA.--279 square miles.
PERIOD OF RECORD.--June 1914 to current year. Monthly discharge only for some periods, published in WSP 1302. Prior to October 1950, published as "at Graters Ford."
GAGE.--Water-stage recorder, crest-stage gage, water-quality monitor, and heated tipping bucket precipitation gage. Datum of gage is 112.66 ft above National Geodetic Vertical Datum of 1929. June 1914, to Sept. 6, 1921, non-recording gage at site 1,650 ft downstream at datum 3.29 ft lower. Sept. 7, 1921, to Sept. 13, 1927, non-recording gage at present site and datum. Satellite and landline telemetry at station.
COOPERATION.--Funding for the operation of this station is provided by the Pennsylvania Department of Environmental Protection, the U.S. Army Corps of Engineers, Philadelphia District and the U.S. Geological Survey.
REMARKS.--regulations from Green Lane Reservoir since December 1956 and from the Bradshaw Distributary since October 1994. Unknown amounts from pumpage to the Limerick power plant on the Schuylkill River.
The 15-minute precipitation data for this station are temporary and will only be displayed for 120 days. Time series of 1-hour or cumulative daily values will NOT be available for retrieval following the 120-day display period. Although the instrumentation is calibrated at least once a year, the temporary classification means that documented routine inspections and other quality assurance measures are not performed that would make the data acceptable for archival, retrieval, or future use in general scientific or interpretive studies.

GAGE HEIGHTS OF IMPORTANCE.-
Supplied by USGS: Data transmitter operational limit - 21.0 ft;
Supplied by NWS: Action stage-9 ft, at 8 ft, Park Avenue in Swenksville is flooded; 9 ft-Flash Flood Alarm sounds at the County EOC; Flood stage-11 ft, at 10 ft, first evacuations begin in Swenksville upstream of gage; Moderate flood stage-13 ft, Sewage treatment plant in Swenksville flooded; Major flood stage-16 ft, at 13.5 ft, houses on left bank in Graterford flood.
This station managed by the PAWSC Downingtown Field Office.

Available Parameters Period of Record
  
2018-11-30  2024-03-27
1914-10-01  2024-03-27
2018-11-30  2024-03-27
1948-04-20  1973-09-29
1948-04-20  1973-09-29







 (365)
 

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


Temperature, water, degrees Celsius


Graph of DAILY Temperature, water, degrees Celsius

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Discharge, cubic feet per second


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


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

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