# # U.S. Geological Survey # National Water Information System # Retrieved: 2025-02-17 04:25:24 EST # # ---------------------------------- 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 14211820 COLUMBIA SLOUGH AT PORTLAND, OR # # 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 14211820 1990-01-28 1570 1,C 1990-06-10 12.65 USGS 14211820 1991-06-20 424 1,C 1991-05-21 12.67 USGS 14211820 1992-02-23 366 1,C 1992-02-22 10.31 USGS 14211820 1992-12-10 340 1,C 1993-05-18 13.16 USGS 14211820 1994-02-27 327 1,C 1994-05-25 8.82 USGS 14211820 1994-10-27 560 1,C 1995-02-02 13.12 USGS 14211820 1995-12-05 2400 1,2,C 1996-02-09 27.26 USGS 14211820 1997-01-05 2080 1,C 1997-01-03 23.04 USGS 14211820 1998-06-02 394 1,C 1998-06-01 15.10 USGS 14211820 1999-03-01 956 1,C 1998-12-31 15.43 USGS 14211820 1999-11-28 497 1,C 1999-11-26 12.76 USGS 14211820 2000-12-15 307 1,C 2000-12-14 7.53 USGS 14211820 2002-02-10 311 1,C 7.01 2 2002-04-18 13.20 USGS 14211820 2003-02-04 873 1,C 11.18 2 2003-02-01 14.29 USGS 14211820 2004-02-01 422 1,C 10.32 2 2004-01-30 10.88 USGS 14211820 2004-12-19 331 1,C 6.04 2 2005-05-22 10.18 USGS 14211820 2006-01-15 1190 1,C 14.40 2 2006-01-13 15.39 USGS 14211820 2006-11-11 502 1,C 8.56 2 2006-12-16 12.23 USGS 14211820 2008-06-08 507 1,C 13.90 2 2008-05-23 15.01 USGS 14211820 2009-01-11 421 1,C 10.43 2 2009-01-08 14.25 USGS 14211820 2010-06-14 854 1,C 12.77 2 2010-06-12 14.66 USGS 14211820 2011-04-08 875 1,C 13.06 2 2011-06-04 17.37 USGS 14211820 2012-04-05 1270 1,C 14.62 2 2012-04-02 15.89 USGS 14211820 2013-07-23 1560 1,C 7.14 2 2012-12-05 10.49 USGS 14211820 2014-07-13 10:00 1530 2,C 7.70 1,2 2014-03-12 0615 13.34 1 USGS 14211820 2014-12-24 01:00 1330 C 9.55 1,2 2015-02-11 1145 11.16 1 USGS 14211820 2015-12-23 08:30 1660 C 10.01 1,2 2015-12-10 1645 12.50 1 USGS 14211820 2017-04-07 09:15 2760 C 13.94 1,2 2017-03-27 1915 17.55 1 USGS 14211820 2018-05-29 15:45 1690 C 13.83 1,2 2018-05-17 0930 15.76 1 USGS 14211820 2019-04-13 20:30 2320 C 13.83 1,2 2019-04-12 1215 15.57 1 USGS 14211820 2020-08-19 09:15 1440 C 4.98 1,2 2020-06-03 0600 12.05 1 USGS 14211820 2021-06-23 07:15 1550 C 6.15 1,2 2021-01-14 1900 13.10 1