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 1988-05-18 to 2026-08-07
Daily data
1 data types available - data from 1944-10-01 to 2026-08-06
Field measurements
2 data types available - data from 1944-10-16 to 2026-06-26
Discrete sample data
133 Observed properties (data types) available - with data from 1963-07-01 to 2002-06-13
105 Sampling activities
Peak measurements
2 data types available - with data from 1945-08-01 to 2024-10-28
Statistical tables for select daily data types
1 data types available - data from 1944-10-01 to 2026-08-06
Important information about this monitoring location
LOCATION.--On right bank, 0.7 mi upstream from Walker Branch, 1.3 mi northwest of Laurel, and 81 mi upstream from mouth. PERIOD OF RECORD.-- October 1944 to current year. GAGE.-- Water-stage recorder and crest-stage gage. Datum of gage is 152.87 ft above North American Vertical Datum of 1988. Prior to Oct. 1, 1955, water-stage recorder and concrete control at site 0.3 mi downstream at different gage datum. Oct. 1, 1955 to Sept. 30, 1956, nonrecording gage at present site at gage datum 1.2 ft lower. Oct. 1, 1956 to Jan. 27, 1957, nonrecording gage at present site and gage datum. Jan. 28, 1957 to May 3, 1972, water-stage recorder and concrete control at present site and gage datum. May 4, 1972 to Sept. 4, 1973, nonrecording gage at present site and gage datum. REMARKS.-- Records do not include diversion at Patuxent (formerly Willis School) filtration plant for supply of Washington Suburban Sanitary District. Flow regulated by Triadelphia Reservoir, and since March 1954 by T. Howard Duckett Reservoir, combined usable capacity, 11,800,000,000 gal; dead storage, 80,000,000 gal.
Monitoring locations with continuous data in last 120 days
No locations found
