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- Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
- For water years 2014 onward, choose a water year and parameter and an on-demand Water-Year Summary report will be generated.
- For water years 2006 through 2013, choose a water year and an Annual Water Data Report will be provided.
- For water years 2005 and earlier, Annual Water Data Reports may be available in digital format.
- Not all sites have reports available for every water year.
USGS Water-Year Summary 2024
01591000 PATUXENT RIVER NEAR UNITY, MD
LOCATION - Lat 39°14'17.7", long 77°03'20.6" referenced to North American Datum of 1983, Montgomery County, MD, Hydrologic Unit 02060006, on right bank at downstream side of bridge on State Highway 97, 0.6 mi upstream from Cattail Creek, 0.8 mi upstream from Triadelphia Reservoir, 1.1 mi northeast of Unity, and 97 mi upstream from mouth.
DRAINAGE AREA - 34.8 mi².
REVISIONS HISTORY - WSP 1111: 1947. WSP 1432: 1948. https://waterdata.usgs.gov/nwis/dv/?site_no=01591000: 2013.
SURFACE-WATER RECORDS
PERIOD OF RECORD - July 1944 to current year.
GAGE - Water stage recorder, crest-stage gage and concrete control. Datum of gage is 364.04 ft above North American Vertical Datum of 1988. Prior to Aug. 14, 1946, non-recording gage at same site and gage datum.
REMARKS - Water Years 2017-2022: Records good, except those above 500 ft³/s, which are fair, and those for estimated discharges, which are poor.
Water Years 2014-2016: Records good, except those above 500 ft³/s, which are fair, and those for estimated daily discharges, which are poor.
Water Year 2013 and prior years' accuracy statements can be found in Annual Water Data Reports.
U.S. Geological Survey satellite data-collection platform at station.
U.S. Geological Survey satellite data-collection platform at station.
