# # U.S. Geological Survey # National Water Information System # Retrieved: 2024-03-29 07:04:43 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 05587500 Mississippi River at Alton, 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 05587500 1856-06-00 573000 7,Bd 440.00 5,Bd USGS 05587500 1928-04-09 216000 411.75 5 USGS 05587500 1929-04-29 365000 424.72 5 USGS 05587500 1930-06-21 186000 408.48 5 USGS 05587500 1931-06-14 145000 403.17 5 USGS 05587500 1931-11-30 182000 408.05 5 USGS 05587500 1933-05-17 265000 416.53 5 USGS 05587500 1934-04-24 97200 394.08 5 USGS 05587500 1935-05-17 231000 413.39 5 USGS 05587500 1936-03-01 218000 411.97 5 USGS 05587500 1937-03-15 255000 415.61 5 USGS 05587500 1938-04-11 268000 416.80 5 USGS 05587500 1939-03-17 240000 414.23 5 USGS 05587500 1940-04-19 137000 401.87 5 USGS 05587500 1941-04-21 220000 412.19 5 USGS 05587500 1942-06-22 253000 415.43 5 USGS 05587500 1943-05-24 437000 429.76 5 USGS 05587500 1944-04-30 395000 426.28 5 USGS 05587500 1945-06-13 308000 424.14 USGS 05587500 1946-01-14 314000 424.20 2,5 1946-01-13 419.10 USGS 05587500 1947-07-03 380000 425.09 2,5 1947-07-02 429.40 USGS 05587500 1948-03-28 366000 424.73 2,5 1948-03-27 424.41 USGS 05587500 1949-03-13 219000 412.08 2,5 1949-03-12 415.08 USGS 05587500 1950-06-24 261000 416.16 2,5 1950-05-01 417.20 USGS 05587500 1951-05-10 333000 424.40 2,5 1951-07-21 429.47 USGS 05587500 1952-04-30 340000 424.47 USGS 05587500 1953-04-05 232000 413.50 USGS 05587500 1954-05-19 198000 409.79 2,5 1954-07-03 409.58 USGS 05587500 1955-04-28 212000 409.66 USGS 05587500 1956-04-30 166000 406.30 USGS 05587500 1957-06-16 180000 411.69 USGS 05587500 1958-07-21 209000 410.99 2,5 1958-07-24 418.98 USGS 05587500 1959-04-08 221000 412.30 2,5 1959-06-03 413.31 USGS 05587500 1960-04-10 377000 424.84 USGS 05587500 1961-04-09 247000 414.88 2,5 1961-05-11 421.62 USGS 05587500 1962-03-26 337000 5 421.42 USGS 05587500 1963-03-23 179000 5 407.72 2,5 1963-03-07 409.58 USGS 05587500 1964-04-22 214000 5 411.54 2,5 1964-04-23 410.17 USGS 05587500 1965-05-03 380000 5 425.09 2,5 1965-04-16 420.75 USGS 05587500 1965-10-01 273000 5 417.26 USGS 05587500 1967-04-19 266000 5 416.62 2,5 1967-06-30 418.67 USGS 05587500 1968-07-10 188000 5 408.70 2,5 1968-05-26 411.32 USGS 05587500 1969-07-13 358000 5 428.64 USGS 05587500 1970-09-28 346000 5 424.53 2,5 1970-05-18 21.41 USGS 05587500 1971-03-02 271000 5 417.08 2,5 1971-03-03 15.00 USGS 05587500 1972-05-07 265000 5 416.53 2,5 1972-05-04 15.99 USGS 05587500 1973-04-29 535000 5 434.31 2,5 1973-04-28 32.15 USGS 05587500 1974-06-03 404000 5 427.05 2,5 1974-05-25 23.11 USGS 05587500 1975-03-31 343000 5 420.37 2 1975-04-27 20.15 USGS 05587500 1976-04-30 310000 5 422.06 USGS 05587500 1977-05-07 179000 5 414.03 USGS 05587500 1978-05-09 286000 5 423.69 2 1978-03-31 21.00 USGS 05587500 1979-04-14 452000 5 430.99 USGS 05587500 1980-06-04 226000 5 415.64 USGS 05587500 1981-05-22 311000 5 424.17 5 USGS 05587500 1982-03-24 363000 5 424.70 5 USGS 05587500 1982-12-05 422000 5 428.53 5 USGS 05587500 1984-04-25 305000 5 423.73 USGS 05587500 1985-03-08 403000 5 425.23 USGS 05587500 1986-05-23 308000 5 423.28 USGS 05587500 1986-10-10 419000 1,5