STATION.--01553240 WEST BRANCH SUSQUEHANNA RIVER AT WEST MILTON, PA
LOCATION.--Lat 41`01'07", long 76`51'55", Union County, Hydrologic Unit 02050206, 50 ft upstream from concrete bridge on SR 642, and 11.2 mi upstream from mouth.
DRAINAGE AREA.--6,825 square miles.
PERIOD OF RECORD.--Water years 1996 to current year.
GAGE.--Water-stage recorder, crest-stage gage, and weighing bucket precipitation gage. Datum of gage is 433.26 ft above North American Vertical Datum of 1988 (from benchmark). Prior to March 9, 1999 the datum of gage was reported as 432.45 ft above sea level. Prior to March 15, 2024, the datum of gage was reported as 434.00 ft above National Geodetic Vertical Datum of 1929 (NGVD29) or erroneously reported as 460 ft above NGVD29 depending on source. Satellite telemetry at station.
COOPERATION.--Station established and maintained by the U.S. Geological Survey in cooperation with the Pennsylvania Department of Environmental Protection and Union County.
REMARKS.--The streamgage cannot record stream levels below a stage of 1.00 foot.

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 NWS: Action stage-16 ft; Flood stage-19 ft; Moderate flood stage-22 ft; Major flood stage-25 ft.