# # U.S. Geological Survey # National Water Information System # Retrieved: 2024-04-23 20:31:03 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 05587450 Mississippi River at Grafton, 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 05587450 1844-06-00 32.10 Bd USGS 05587450 1986-10-10 423000 5 29.67 USGS 05587450 1987-12-29 187000 5 17.22 USGS 05587450 1989-04-05 163000 5 14.81 2,5 1989-03-20 15.91 USGS 05587450 1990-06-26 340000 5 24.46 USGS 05587450 1991-05-08 294000 5 21.52 USGS 05587450 1992-05-02 235000 5 17.81 2,5 1992-05-03 17.94 USGS 05587450 1993-08-01 598000 5 38.17 USGS 05587450 1993-10-01 345000 5 27.28 USGS 05587450 1995-05-28 419000 5 30.32 2,5 1995-05-22 30.47 USGS 05587450 1996-06-01 336000 5 26.45 2,5 1996-06-02 26.74 USGS 05587450 1997-03-01 305000 5 23.86 USGS 05587450 1998-04-17 358000 5 25.81 USGS 05587450 1999-05-04 296000 5 23.05 USGS 05587450 2000-06-29 291000 5 20.37 USGS 05587450 2001-05-19 19:00 367000 5 25.19 USGS 05587450 2002-05-15 380000 5 27.66 USGS 05587450 2003-05-12 249000 5 18.74 USGS 05587450 2004-06-05 307000 5 21.41 USGS 05587450 2005-01-14 12:00 239000 5 17.83 2 2005-01-06 1600 18.53 USGS 05587450 2006-04-24 18:00 217000 5 16.47 USGS 05587450 2007-04-16 269000 5 19.83 USGS 05587450 2008-06-28 440000 5 30.80 USGS 05587450 2009-05-20 347000 5 24.92 USGS 05587450 2010-06-27 372000 5 26.54 2 2010-06-29 26.57 USGS 05587450 2011-05-01 362000 5 25.93 USGS 05587450 2012-05-06 219000 5 16.37 USGS 05587450 2013-04-25 453000 5 29.52 2 2013-06-04 0630 30.94 1 USGS 05587450 2014-07-11 07:30 376000 5 25.99 USGS 05587450 2015-06-30 12:30 409000 5 29.51 USGS 05587450 2015-12-30 09:30 412000 5 30.79 2 2015-12-30 2030 30.91 USGS 05587450 2017-05-09 376000 5 26.64 2 2017-05-05 2330 29.58 USGS 05587450 2018-09-12 06:00 286000 5 20.93 USGS 05587450 2019-06-07 16:00 523000 5 35.17 USGS 05587450 2020-03-30 22:30 304000 6 22.38 2 2019-10-13 1300 22.67 USGS 05587450 2021-04-14 09:30 282000 6 20.63 2 2021-03-20 1600 21.86 USGS 05587450 2022-05-07 19:30 287000 6 21.20 2 2022-05-07 1030 21.28