# # U.S. Geological Survey # National Water Information System # Retrieved: 2024-04-18 19:24:01 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 01491000 CHOPTANK RIVER NEAR GREENSBORO, 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 01491000 1948-01-14 1600 7.95 USGS 01491000 1948-12-31 1700 8.24 USGS 01491000 1950-09-11 1050 6.22 USGS 01491000 1951-06-11 840 5.40 USGS 01491000 1951-12-22 3640 9.99 USGS 01491000 1953-02-16 1330 7.08 USGS 01491000 1953-12-15 1180 6.62 USGS 01491000 1955-08-14 1140 7.41 USGS 01491000 1956-03-15 989 6.78 USGS 01491000 1956-11-03 4140 11.47 USGS 01491000 1958-08-26 4380 11.74 USGS 01491000 1959-01-03 758 5.71 USGS 01491000 1960-09-13 5040 12.45 USGS 01491000 1961-01-02 2400 2 9.20 5 USGS 01491000 1962-04-09 1580 7.93 USGS 01491000 1963-03-13 1890 8.47 USGS 01491000 1964-02-20 1890 8.47 USGS 01491000 1965-03-06 525 4.59 USGS 01491000 1966-02-17 150 2.60 USGS 01491000 1967-08-04 6970 14.47 1935 USGS 01491000 1968-03-19 1620 8.01 USGS 01491000 1969-08-05 1620 8.02 USGS 01491000 1969-12-27 1650 8.07 USGS 01491000 1971-02-24 1570 7.92 USGS 01491000 1972-06-23 2760 9.71 USGS 01491000 1973-02-03 2660 9.57 USGS 01491000 1974-04-01 944 6.28 USGS 01491000 1975-07-14 2860 9.86 USGS 01491000 1976-01-02 2080 8.73 USGS 01491000 1977-03-23 386 3.99 USGS 01491000 1978-03-27 3180 10.30 USGS 01491000 1979-02-26 6110 13.61 USGS 01491000 1980-05-02 904 6.27 USGS 01491000 1980-10-26 638 5.48 USGS 01491000 1982-02-20 877 6.16 USGS 01491000 1983-04-16 3260 10.72 USGS 01491000 1984-03-30 2600 9.79 USGS 01491000 1985-09-28 1410 7.54 USGS 01491000 1986-01-27 1090 6.75 USGS 01491000 1986-12-25 2060 8.89 USGS 01491000 1988-02-13 1090 6.75 USGS 01491000 1989-03-25 2510 9.41 USGS 01491000 1990-05-30 1960 8.52 USGS 01491000 1991-01-12 1260 7.17 USGS 01491000 1992-03-28 744 5.74 USGS 01491000 1993-03-18 2260 9.03 USGS 01491000 1994-03-03 4800 12.20 USGS 01491000 1995-03-09 1490 7.68 USGS 01491000 1996-06-20 2810 9.26 2 1996-01-19 9.32 1 USGS 01491000 1996-12-14 5120 12.52 USGS 01491000 1998-01-29 10:00 3120 10.26 USGS 01491000 1999-09-17 05:00 6420 13.92 USGS 01491000 2000-03-22 20:45 3130 10.28 USGS 01491000 2001-06-18 5240 12.66 USGS 01491000 2002-05-03 21:30 406 4.06 USGS 01491000 2003-02-24 06:15 3090 10.23 USGS 01491000 2004-04-14 19:30 2470 9.35 USGS 01491000 2005-04-09 00:15 2610 9.56 USGS 01491000 2006-06-27 08:15 2860 9.91 USGS 01491000 2007-04-16 13:30 4720 12.56 USGS 01491000 2008-05-13 06:45 2390 9.23 USGS 01491000 2009-08-23 14:45 2890 10.00 USGS 01491000 2010-03-14 06:15 3990 11.61 USGS 01491000 2011-08-28 09:45 8880 17.96 USGS 01491000 2011-12-08 14:30 3900 11.41 USGS 01491000 2012-10-30 14:45 4480 12.17 USGS 01491000 2014-03-31 08:00 2520 9.44 USGS 01491000 2015-01-19 12:30 1770 8.19 USGS 01491000 2016-02-25 21:30 1300 7.28 USGS 01491000 2017-03-15 07:00 1720 8.10 USGS 01491000 2018-02-12 00:15 4270 11.90 USGS 01491000 2018-10-12 23:30 2220 8.96 USGS 01491000 2020-09-04 19:15 2100 8.76 USGS 01491000 2020-12-25 20:30 3220 10.38 USGS 01491000 2022-04-07 04:00 2090 8.52 USGS 01491000 2023-04-29 21:15 3040 10.12