# # U.S. Geological Survey # National Water Information System # Retrieved: 2024-12-04 14:19:31 EST # # ---------------------------------- WARNING ---------------------------------------- # Some of the data that you have obtained from this U.S. Geological Survey database # may not have received Director's approval. Any such data values are qualified # as provisional and are subject to revision. Provisional data are released on the # condition that neither the USGS nor the United States Government may be held liable # for any damages resulting from its use. # # More data may be available offline. # For more information on these data, contact USGS Water Data Inquiries. # This file contains the annual peak streamflow data. # # This information includes the following fields: # # agency_cd Agency Code # site_no USGS station number # peak_dt Date of peak streamflow (format YYYY-MM-DD) # peak_tm Time of peak streamflow (24 hour format, 00:00 - 23:59) # peak_va Annual peak streamflow value in cfs # peak_cd Peak Discharge-Qualification codes (see explanation below) # gage_ht Gage height for the associated peak streamflow in feet # gage_ht_cd Gage height qualification codes # year_last_pk Peak streamflow reported is the highest since this year # ag_dt Date of maximum gage-height for water year (if not concurrent with peak) # ag_tm Time of maximum gage-height for water year (if not concurrent with peak # ag_gage_ht maximum Gage height for water year in feet (if not concurrent with peak # ag_gage_ht_cd maximum Gage height code # # Sites in this file include: # USGS 01593500 LITTLE PATUXENT RIVER AT GUILFORD, MD # # Peak Streamflow-Qualification Codes(peak_cd): # 1 ... Discharge is a Maximum Daily Average # 2 ... Discharge is an Estimate # 3 ... Discharge affected by Dam Failure # 4 ... Discharge less than indicated value, # which is Minimum Recordable Discharge at this site # 5 ... Discharge affected to unknown degree by # Regulation or Diversion # 6 ... Discharge affected by Regulation or Diversion # 7 ... Discharge is an Historic Peak # 8 ... Discharge actually greater than indicated value # 9 ... Discharge due to Snowmelt, Hurricane, # Ice-Jam or Debris Dam breakup # A ... Year of occurrence is unknown or not exact # Bd ... Day of occurrence is unknown or not exact # Bm ... Month of occurrence is unknown or not exact # C ... All or part of the record affected by Urbanization, # Mining, Agricultural changes, Channelization, or other # F ... Peak supplied by another agency # O ... Opportunistic value not from systematic data collection # R ... Revised # # Gage height qualification codes(gage_ht_cd,ag_gage_ht_cd): # 1 ... Gage height affected by backwater # 2 ... Gage height not the maximum for the year # 3 ... Gage height at different site and(or) datum # 4 ... Gage height below minimum recordable elevation # 5 ... Gage height is an estimate # 6 ... Gage datum changed during this year # 7 ... Debris, mud, or hyper-concentrated flow # 8 ... Gage height tidally affected # Bd ... Day of occurrence is unknown or not exact # Bm ... Month of occurrence is unknown or not exact # F ... Peak supplied by another agency # R ... Revised # # agency_cd site_no peak_dt peak_tm peak_va peak_cd gage_ht gage_ht_cd year_last_pk ag_dt ag_tm ag_gage_ht ag_gage_ht_cd 5s 15s 10d 6s 8s 33s 8s 27s 4s 10d 6s 8s 27s USGS 01593500 1933-08-23 4210 12.50 USGS 01593500 1934-09-17 1480 9.40 USGS 01593500 1935-07-21 915 7.70 USGS 01593500 1936-01-03 1320 9.00 USGS 01593500 1937-04-26 2000 10.30 USGS 01593500 1937-11-13 1820 10.10 USGS 01593500 1939-01-30 968 7.90 USGS 01593500 1940-04-20 2740 11.50 5 USGS 01593500 1941-06-24 563 6.14 USGS 01593500 1942-07-11 2180 10.66 USGS 01593500 1943-05-12 1400 9.17 USGS 01593500 1943-11-09 2060 10.46 USGS 01593500 1945-07-18 3810 12.22 USGS 01593500 1945-12-06 1080 8.28 USGS 01593500 1947-05-01 815 8.02 USGS 01593500 1948-02-14 1550 9.91 USGS 01593500 1949-01-06 703 7.27 USGS 01593500 1950-09-11 560 6.39 USGS 01593500 1951-06-03 1970 10.47 USGS 01593500 1952-09-01 5300 13.26 USGS 01593500 1952-11-22 2000 10.20 USGS 01593500 1953-12-14 645 6.28 USGS 01593500 1955-08-13 3790 12.11 USGS 01593500 1955-10-14 1010 8.37 USGS 01593500 1957-04-05 612 6.23 USGS 01593500 1958-07-12 1230 9.02 USGS 01593500 1959-09-02 756 7.03 USGS 01593500 1960-09-12 1000 8.34 USGS 01593500 1961-04-13 967 8.18 USGS 01593500 1962-03-12 1280 9.12 USGS 01593500 1963-03-06 819 7.38 USGS 01593500 1964-01-09 1160 8.86 USGS 01593500 1965-03-05 877 7.70 USGS 01593500 1966-02-13 1200 8.94 USGS 01593500 1967-03-07 1180 8.90 USGS 01593500 1968-01-14 1410 9.37 USGS 01593500 1969-09-02 684 6.63 USGS 01593500 1969-12-11 686 6.64 USGS 01593500 1971-08-04 3070 11.45 USGS 01593500 1972-06-22 07:30 12400 18.38 USGS 01593500 1973-04-01 1880 10.08 USGS 01593500 1974-03-30 1110 8.70 USGS 01593500 1975-09-26 11:30 5370 13.39 USGS 01593500 1976-01-01 1910 10.12 USGS 01593500 1977-03-22 754 7.02 USGS 01593500 1978-01-26 3670 11.92 USGS 01593500 1979-09-06 4680 12.84 USGS 01593500 1979-10-01 1110 8.71 USGS 01593500 1981-06-14 988 8.20 USGS 01593500 1982-02-03 777 7.15 USGS 01593500 1983-06-21 2780 10.93 USGS 01593500 1984-07-01 1490 8.69 USGS 01593500 1985-02-12 1430 8.53 USGS 01593500 1986-04-16 680 5.56 USGS 01593500 1986-12-24 1230 7.93 USGS 01593500 1987-11-29 1230 7.94 USGS 01593500 1989-05-06 5070 13.16 USGS 01593500 1989-11-16 1040 7.85 2 1990-01-01 0300 8.01 1 USGS 01593500 1991-03-23 2060 9.93 USGS 01593500 1992-03-27 1180 7.73 USGS 01593500 1993-03-04 1900 9.62 USGS 01593500 1993-11-28 3180 11.42 USGS 01593500 1995-08-06 1150 7.61 USGS 01593500 1996-01-19 2460 10.51 USGS 01593500 1996-11-08 3950 12.19 USGS 01593500 1998-03-09 10:30 1570 8.91 USGS 01593500 1999-09-16 17:30 2520 10.60 USGS 01593500 2000-03-22 934 6.70 USGS 01593500 2000-12-17 11:30 1750 9.31 USGS 01593500 2002-05-02 11:00 739 5.73 USGS 01593500 2003-09-23 08:15 2630 10.74 USGS 01593500 2003-12-11 12:30 1660 9.12 USGS 01593500 2005-01-14 10:45 1510 8.76 USGS 01593500 2006-06-25 23:45 7450 15.09 USGS 01593500 2006-11-17 02:00 1320 8.20 USGS 01593500 2008-05-12 13:15 1410 8.46 USGS 01593500 2008-12-12 01:00 918 6.63 USGS 01593500 2010-03-13 20:30 1960 9.73 USGS 01593500 2011-09-07 18:30 6170 14.06 USGS 01593500 2012-06-01 21:15 1180 7.71 USGS 01593500 2012-10-30 01:45 4270 12.47 USGS 01593500 2014-04-30 21:15 6120 14.02 USGS 01593500 2015-06-27 20:00 2660 10.77 USGS 01593500 2016-07-31 02:15 7230 14.97 USGS 01593500 2017-07-29 03:00 3770 12.05 USGS 01593500 2018-05-27 23:15 7590 15.23 USGS 01593500 2018-12-16 04:45 1800 9.41 USGS 01593500 2019-11-01 02:00 1590 8.94 USGS 01593500 2020-12-25 02:30 1310 8.20 USGS 01593500 2022-06-08 23:30 2650 10.75 USGS 01593500 2022-12-23 01:30 998 7.21