# # U.S. Geological Survey # National Water Information System # Retrieved: 2024-05-03 14:33:36 EDT # # ---------------------------------- 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 01613000 POTOMAC RIVER AT HANCOCK, 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 01613000 1889-05-00 220000 7,Bd 40.00 Bd 1889 USGS 01613000 1924-05-00 160000 7,Bd 35.00 Bd USGS 01613000 1929-04-00 110000 7,Bd 32.40 Bd USGS 01613000 1933-04-21 64400 23.10 USGS 01613000 1934-01-08 27700 14.20 USGS 01613000 1935-01-23 38600 17.30 USGS 01613000 1936-03-18 340000 47.60 USGS 01613000 1937-04-27 153000 35.70 USGS 01613000 1937-10-29 122000 31.80 USGS 01613000 1939-02-04 76600 24.85 USGS 01613000 1940-06-01 58100 21.33 USGS 01613000 1941-04-06 36500 16.48 USGS 01613000 1942-05-23 67000 23.18 USGS 01613000 1942-10-16 155000 36.63 USGS 01613000 1944-05-08 42400 18.10 USGS 01613000 1945-09-19 61000 21.98 USGS 01613000 1946-06-03 25000 13.62 USGS 01613000 1947-03-16 23000 13.05 USGS 01613000 1948-04-15 62500 22.27 USGS 01613000 1949-06-19 88400 26.86 USGS 01613000 1950-02-02 40300 17.61 USGS 01613000 1951-06-14 67300 23.61 USGS 01613000 1952-04-29 58600 21.89 USGS 01613000 1952-11-22 38300 17.35 USGS 01613000 1954-03-02 72100 24.52 USGS 01613000 1955-08-19 123000 32.40 USGS 01613000 1956-04-08 40300 17.82 USGS 01613000 1957-02-11 47200 19.43 USGS 01613000 1958-05-06 44600 18.85 USGS 01613000 1959-06-04 22700 13.11 2 1959-01-23 14.38 1 USGS 01613000 1960-05-09 80600 26.60 USGS 01613000 1961-02-20 56500 22.10 USGS 01613000 1962-03-22 68800 24.50 USGS 01613000 1963-03-21 81800 26.24 USGS 01613000 1964-04-30 62200 22.61 USGS 01613000 1965-03-06 43500 18.58 USGS 01613000 1966-02-14 35300 16.60 USGS 01613000 1967-03-08 85900 26.91 USGS 01613000 1968-05-29 40900 17.97 USGS 01613000 1969-03-26 17700 11.48 USGS 01613000 1970-04-03 57200 21.61 USGS 01613000 1971-02-14 63600 22.91 USGS 01613000 1972-06-23 112000 30.79 USGS 01613000 1973-04-28 54600 21.06 USGS 01613000 1973-12-28 65100 23.19 USGS 01613000 1975-03-20 77200 25.44 USGS 01613000 1976-01-02 57700 21.71 USGS 01613000 1976-10-10 96700 28.56 USGS 01613000 1978-03-15 68800 23.73 2 1978-01-27 29.13 1 USGS 01613000 1979-02-27 81300 25.96 USGS 01613000 1980-05-01 43800 18.67 USGS 01613000 1981-04-14 29900 15.15 USGS 01613000 1982-02-04 47000 19.40 USGS 01613000 1983-04-25 60700 22.21 USGS 01613000 1984-02-15 79500 25.64 USGS 01613000 1985-06-01 30500 15.31 USGS 01613000 1985-11-06 207000 41.20 USGS 01613000 1987-04-18 70600 24.07 USGS 01613000 1988-05-07 55800 21.25 USGS 01613000 1989-05-17 34600 16.41 USGS 01613000 1990-05-30 25600 13.93 2 1990-01-02 17.03 1 USGS 01613000 1991-03-24 46500 19.31 USGS 01613000 1992-04-23 28500 14.77 USGS 01613000 1993-04-17 76400 25.10 USGS 01613000 1994-05-09 46800 19.37 USGS 01613000 1995-01-16 41100 18.03 USGS 01613000 1996-01-20 152000 36.26 USGS 01613000 1996-12-02 41400 18.10 USGS 01613000 1998-03-22 05:15 55000 21.08 USGS 01613000 1999-03-19 10:45 22700 13.02 USGS 01613000 2000-02-20 03:30 37100 17.05 USGS 01613000 2001-03-22 14:00 29000 14.92 USGS 01613000 2002-04-23 13:00 33000 15.98 USGS 01613000 2003-09-20 07:00 82100 26.09 USGS 01613000 2003-11-20 22:30 45100 18.97 USGS 01613000 2005-03-29 22:00 66200 23.26 USGS 01613000 2006-04-23 13:00 22400 12.92 USGS 01613000 2007-04-16 12:00 56400 21.36 USGS 01613000 2008-03-06 03:45 46300 19.25 USGS 01613000 2009-05-05 13:00 61500 22.36 USGS 01613000 2010-03-14 17:30 81200 25.94 USGS 01613000 2011-05-19 06:00 78100 25.41 USGS 01613000 2011-12-08 18:00 34800 16.45 USGS 01613000 2013-05-09 04:30 44500 18.84 USGS 01613000 2014-05-17 02:45 57800 21.33 USGS 01613000 2015-06-28 21:45 28500 14.45 USGS 01613000 2016-02-04 09:30 35600 15.93 USGS 01613000 2017-05-06 09:45 32100 15.04 USGS 01613000 2018-06-04 01:30 90000 26.38 USGS 01613000 2018-12-16 16:00 73900 23.57 USGS 01613000 2020-05-01 11:15 43200 17.42 USGS 01613000 2021-03-01 19:00 57200 20.38 USGS 01613000 2022-05-08 09:30 64200 21.76 USGS 01613000 2023-03-04 19:30 19000 11.28