--01473000 PERKIOMEN CREEK AT GRATERFORD,
--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.
--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."
--Water-stage recorder, crest-stage gage, 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.
--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.
GAGE HEIGHTS OF IMPORTANCE
|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.
Supplied by USGS
: Data transmitter operational limit -
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.