Funding for this site is provided by:
--03029000 CLARION RIVER AT RIDGWAY, PA
--Lat 41`25'15", long
78`44'10", Elk County, Hydrologic Unit 05010005, at bridge on
State Highway 948 in Ridgway, 300 ft below the mouth of Elk
--303 square miles.
PERIOD OF RECORD.
--1940 to 1953, 1954 to 1993
(measurements only). 1994 to September 2017 (annual peaks only).
October 2017 to current year.
--Water-stage recorder and crest-stage gage.
Datum of gage is 1354.5 ft above North American Vertical Datum of 1988.
Prior to Oct 12, 1962, at site 200 ft upstream, at datum 6.74 ft
higher. Prior to April 5, 2023, the datum of gage was reported as
1354.88 ft above National Geodetic Vertical Datum of 1929 (from
benchmark). Also, prior to March 30, 2011 and April 5, 2023, the datum
of gage was erroneously reported as 1361.62 ft above National Geodetic
Vertical Datum of 1929. Satellite and landline telemetry at
--Funding for the operation of this
station is provided by Brookfield Power.
--Flow regulated since June 1952 by East
Branch Clarion River Lake and at low flow by industrial plant above
station. Daily discharge not available prior to Oct 1, 2017.
GAGE HEIGHTS OF IMPORTANCE
Supplied by NWS
: Action stage-11 ft; Flood stage-16
ft; Moderate flood stage-18 ft; Major flood stage-20 ft.