Important Legacy real-time page
Available data
Select data types to graph from categories based on the way the data were collected.
Learn about the data collection categories Continuous data
3 data types available - data from 1990-10-01 to 2026-07-30
Daily data
1 data types available - data from 1946-06-21 to 2026-07-28
Field measurements
2 data types available - data from 1946-06-21 to 2026-07-09
Discrete sample data
31 Observed properties (data types) available - with data from 1964-05-22 to 1987-08-24
67 Sampling activities
Statistical tables for select daily data types
1 data types available - data from 1946-06-21 to 2026-07-28
Important information about this monitoring location
LOCATION.-- On left bank at downstream side of bridge on State Highway 471 (Indian Bridge Road) in Great Mills (formerly Clifton Mills), 0.3 mi downstream from Western Branch, and 12.0 mi upstream from mouth. PERIOD OF RECORD.-- June 1946 to September 2005. October 2006 to current year. GAGE.-- Water-stage recorder, crest-stage gage, and concrete control. Datum of gage is 6.43 ft above North American Vertical Datum of 1988. REMARKS.-- Occasional regulation by reservoir on Western Branch of St. Marys River, 2.0 mi upstream since 1975, total capacity 3,200 acre-feet.
Monitoring locations with continuous data in last 120 days
No locations found
