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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
01593500 LITTLE PATUXENT RIVER AT GUILFORD, MD
LOCATION - Lat 39°10'03.9", long 76°51'04.5" referenced to North American Datum of 1983, Howard County, MD, Hydrologic Unit 02060006, on left bank 25 ft downstream from bridge on Guilford Road (formerly State Highway 32), 1 mi west of Guilford, 3 mi upstream from Middle Patuxent River, 4 mi north of Laurel, and 20.1 mi upstream from mouth.
DRAINAGE AREA - 38 mi².
REVISIONS HISTORY - WSP 1502: 1933, 1934(M), 1939(M), 1945(M), 1948(P).
SURFACE-WATER RECORDS
PERIOD OF RECORD - April 1932 to current year. Monthly discharge only for April 1932, published in WSP 1302.
GAGE - Water-stage recorder and crest-stage gage. Concrete control since June 20, 1946. Datum of gage is 258.56 ft above North American Vertical Datum of 1988. Prior to June 25, 1946, nonrecording gage at same site and gage datum.
REMARKS - Water Year 2023: Records fair, except those for estimated discharges, which are poor.
Water Year 2022: Records fair, except those above 1,600 ft³/s and those for estimated discharges, which are poor.
Water Year 2021: Records good, except those for estimated discharges, which are poor.
Water Year 2020: Records good. No estimated discharges.
Water Years 2018-2019: Records good, except those for estimated discharges, which are poor.
Water Year 2017: Records good, except those above 1,000 ft³/s, and those for estimated discharges, which are poor.
Water Years 2015-2016: Records good, except those above 1,000 ft³/s, and those for estimated daily discharges, which are poor.
Water Year 2014: Records fair, except those above 1,000 ft³/s, and those for estimated daily discharges, which are poor.
Water Year 2013 and prior years' accuracy statements can be found in Annual Water Date Reports.
Low flow affected by regulation from unknown source. U.S. Geological Survey satellite data-collection platform at station.
Low flow affected by regulation from unknown source. U.S. Geological Survey satellite data-collection platform at station.
