# # U.S. Geological Survey # National Water Information System # Retrieved: 2024-05-04 10:43:26 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 12031000 CHEHALIS RIVER AT PORTER, WA # # 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 12031000 1947-01-26 26300 2 USGS 12031000 1948-01-05 23000 2 USGS 12031000 1949-02-24 33500 2 USGS 12031000 1950-02-27 32500 2 USGS 12031000 1951-02-11 36100 2 USGS 12031000 1952-02-06 21900 18.70 USGS 12031000 1953-01-31 24800 19.93 USGS 12031000 1954-01-07 40800 22.27 USGS 12031000 1955-01-02 19200 18.03 USGS 12031000 1955-12-23 38900 22.04 USGS 12031000 1956-12-12 23600 19.35 USGS 12031000 1957-12-28 22000 18.82 USGS 12031000 1959-01-26 24300 19.60 USGS 12031000 1959-11-23 30100 20.71 USGS 12031000 1961-02-23 32000 21.04 USGS 12031000 1961-12-23 21000 18.49 USGS 12031000 1962-11-28 31600 20.96 USGS 12031000 1964-01-27 38500 21.99 USGS 12031000 1965-01-31 34000 21.36 USGS 12031000 1966-01-08 26300 20.21 USGS 12031000 1966-12-15 35700 21.73 USGS 12031000 1968-02-06 27800 20.46 USGS 12031000 1969-01-08 22200 19.43 USGS 12031000 1970-01-28 29200 20.70 USGS 12031000 1971-01-27 49600 23.50 USGS 12031000 1972-01-22 55600 23.88 USGS 12031000 1972-12-28 28100 20.51 USGS 12031000 1974-01-17 39100 22.22 USGS 12031000 1975-01-16 32100 21.19 USGS 12031000 1975-12-05 48100 23.36 USGS 12031000 1977-03-10 17500 18.34 USGS 12031000 1977-12-15 38900 22.18 USGS 12031000 1979-02-09 22300 19.46 USGS 12031000 1979-12-19 28600 20.60 USGS 12031000 1980-12-28 32000 21.17 USGS 12031000 1982-01-26 33300 21.39 USGS 12031000 1983-01-08 24800 1 20.83 USGS 12031000 1984-01-26 23200 20.30 USGS 12031000 1984-11-30 21800 19.97 USGS 12031000 1986-11-25 45900 23.36 USGS 12031000 1988-01-17 22000 1 USGS 12031000 1989-01-01 18900 19.21 USGS 12031000 1990-01-11 60400 24.52 USGS 12031000 1990-11-26 43000 23.17 USGS 12031000 1992-01-31 24900 20.69 USGS 12031000 1993-01-27 12300 16.42 USGS 12031000 1994-03-05 15500 18.19 USGS 12031000 1994-12-22 35600 22.37 USGS 12031000 1996-02-09 80700 25.22 USGS 12031000 1997-01-02 46000 23.43 USGS 12031000 1998-01-17 24100 20.53 USGS 12031000 1999-02-26 42000 22.50 USGS 12031000 1999-12-17 38100 22.04 USGS 12031000 2001-02-05 6550 11.56 USGS 12031000 2001-12-19 41200 22.41 USGS 12031000 2003-02-02 26000 20.80 USGS 12031000 2004-02-01 24900 20.66 USGS 12031000 2005-01-20 22100 20.50 USGS 12031000 2006-01-13 43200 22.64 USGS 12031000 2006-11-09 29400 21.85 USGS 12031000 2007-12-05 86500 26.06 USGS 12031000 2009-01-09 58700 24.65 USGS 12031000 2009-11-19 23800 20.43 USGS 12031000 2010-12-15 27000 21.15 USGS 12031000 2012-03-17 26200 21.02 USGS 12031000 2012-11-21 27300 21.13 USGS 12031000 2014-02-19 29800 21.54 USGS 12031000 2015-01-07 28300 21.31 USGS 12031000 2015-12-11 40000 22.73 USGS 12031000 2017-02-11 31900 21.79 USGS 12031000 2017-11-24 14:15 23100 20.52 2 2018-05-10 1300 33.38 6 USGS 12031000 2018-12-19 23:00 16300 45.80 USGS 12031000 2020-01-09 07:00 28500 48.99 USGS 12031000 2021-01-06 03:45 31000 49.30 USGS 12031000 2022-01-08 14:30 61900 52.01 USGS 12031000 2022-12-29 11:15 22500 47.87