# # U.S. Geological Survey # National Water Information System # Retrieved: 2024-04-19 08:49:53 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 07020500 Mississippi River at Chester, IL # # 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 07020500 1844-06-30 1050000 1,6,7 39.80 USGS 07020500 1926-09-30 501000 1,6 23.80 USGS 07020500 1927-04-27 1060000 1,6 34.40 USGS 07020500 1928-06-23 626000 1,6 28.00 USGS 07020500 1929-04-29 878000 1,6 33.30 2 1929-01-01 33.30 USGS 07020500 1930-06-21 342000 1,6 19.70 USGS 07020500 1931-06-16 221000 1,6 14.40 USGS 07020500 1931-12-01 451000 1,6 23.30 USGS 07020500 1933-05-18 500000 1,6 28.90 USGS 07020500 1934-04-25 137000 1,6 10.20 USGS 07020500 1935-06-10 665000 1,6 33.40 USGS 07020500 1936-03-01 326000 1,6 20.80 USGS 07020500 1937-05-06 422000 1,6 24.60 USGS 07020500 1938-05-28 540000 1,6 27.10 USGS 07020500 1939-04-21 618000 1,6 30.60 USGS 07020500 1940-04-21 193000 1,6 13.60 USGS 07020500 1941-04-24 455000 1,6 26.90 USGS 07020500 1942-07-01 603000 6 34.00 USGS 07020500 1943-05-24 873000 6 38.08 USGS 07020500 1944-05-02 842000 6 37.40 USGS 07020500 1945-04-02 716000 6 33.00 2 1945-06-14 34.40 USGS 07020500 1946-01-13 502000 6 27.50 USGS 07020500 1947-07-03 886000 6 38.00 2 1947-07-04 38.17 USGS 07020500 1948-03-28 668000 6 32.80 USGS 07020500 1949-04-03 426000 6 24.70 USGS 07020500 1950-05-15 476000 6 27.60 USGS 07020500 1951-07-22 795000 6 39.10 2 1951-07-23 39.30 USGS 07020500 1952-04-30 685000 6 34.10 2 1952-05-01 34.40 USGS 07020500 1953-04-05 378000 6 22.20 USGS 07020500 1954-06-07 289000 6 18.80 USGS 07020500 1955-02-23 332000 6 19.50 USGS 07020500 1955-10-09 221000 6 14.90 USGS 07020500 1957-05-28 426000 6 25.60 USGS 07020500 1958-07-25 510000 6 29.30 USGS 07020500 1959-06-04 361000 6 23.10 USGS 07020500 1960-04-11 680000 6 33.70 USGS 07020500 1961-05-12 691000 6 34.30 USGS 07020500 1962-03-26 625000 6 30.60 USGS 07020500 1963-03-08 308000 6 19.00 2 1963-05-19 19.12 USGS 07020500 1964-04-24 304000 6 20.04 2 1964-06-28 20.06 USGS 07020500 1965-09-29 544000 6 29.79 USGS 07020500 1965-10-01 498000 6 28.61 USGS 07020500 1967-07-01 530000 6 30.33 USGS 07020500 1968-05-27 383000 6 23.07 USGS 07020500 1969-07-15 644000 6 35.73 USGS 07020500 1970-05-19 544000 6 30.89 USGS 07020500 1971-03-03 421000 6 24.55 2 1970-10-01 28.95 USGS 07020500 1972-05-05 416000 6 25.87 USGS 07020500 1973-04-30 886000 6 43.32 USGS 07020500 1974-05-26 537000 6 32.48 USGS 07020500 1975-04-28 544000 6 31.39 USGS 07020500 1976-05-01 453000 6 28.10 USGS 07020500 1977-09-17 339000 6 21.99 USGS 07020500 1978-03-29 632000 6 32.86 USGS 07020500 1979-04-16 760000 6 39.79 USGS 07020500 1980-04-03 364000 6 24.14 USGS 07020500 1981-05-22 524000 6 31.24 USGS 07020500 1982-06-13 550000 6 32.24 USGS 07020500 1982-12-09 825000 6 41.02 USGS 07020500 1984-04-25 605000 6 34.97 USGS 07020500 1985-02-28 749000 6 36.60 USGS 07020500 1985-11-23 620000 6 35.14 USGS 07020500 1986-10-10 754000 6 39.54 USGS 07020500 1987-12-29 426000 6 25.57 USGS 07020500 1989-09-14 330000 6 21.57 USGS 07020500 1990-05-20 661000 6 35.53 USGS 07020500 1991-05-09 448000 6 27.78 USGS 07020500 1992-04-24 434000 6 27.11 USGS 07020500 1993-08-07 1000000 6 49.74 USGS 07020500 1993-10-01 756000 6 41.41 USGS 07020500 1995-05-22 876000 6 43.46 5 USGS 07020500 1996-06-03 626000 6 36.08 USGS 07020500 1997-03-02 580000 6 34.31 USGS 07020500 1998-04-18 574000 6 35.09 USGS 07020500 1999-05-09 552000 6 34.04 USGS 07020500 2000-06-30 425000 6 27.74 USGS 07020500 2001-06-11 591000 6 35.31 USGS 07020500 2002-05-17 738000 6 40.95 USGS 07020500 2003-05-13 427000 6 27.11 USGS 07020500 2004-05-30 457000 6 29.35 USGS 07020500 2005-01-07 19:00 496000 6 30.76 USGS 07020500 2006-05-06 11:00 308000 6 20.72 USGS 07020500 2007-05-13 486000 6 30.28 USGS 07020500 2008-07-01 696000 6 39.44 USGS 07020500 2009-05-21 585000 6 34.86 USGS 07020500 2010-06-30 620000 6 36.34 USGS 07020500 2011-05-02 703000 6 39.74 USGS 07020500 2012-03-26 350000 6 23.02 USGS 07020500 2013-06-05 777000 6 42.41 USGS 07020500 2014-07-12 16:00 537000 6 31.80 USGS 07020500 2015-07-02 10:00 703000 6 39.68 USGS 07020500 2016-01-01 21:30 953000 6 45.99 USGS 07020500 2017-05-06 02:30 903000 6 44.66 USGS 07020500 2018-09-11 13:00 470000 29.33 USGS 07020500 2019-06-10 15:30 961000 46.52 USGS 07020500 2020-06-02 06:00 554000 6 33.46 USGS 07020500 2021-03-21 16:30 563000 6 33.85 USGS 07020500 2022-05-08 18:00 527000 6 32.28 USGS 07020500 2023-03-29 16:30 388000 24.90