# # U.S. Geological Survey # National Water Information System # Retrieved: 2025-04-07 07:18:51 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 02335450 CHATTAHOOCHEE RIVER ABOVE ROSWELL, GA # # 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 02335450 1977-03-30 11800 6 8.88 USGS 02335450 1978-01-25 10800 6 8.45 USGS 02335450 1979-04-13 13800 6 9.75 USGS 02335450 1980-05-24 10600 6 8.63 USGS 02335450 1981-09-29 8020 6 7.57 USGS 02335450 1982-02-03 10600 6 8.64 USGS 02335450 1983-04-08 9700 6 8.29 USGS 02335450 1983-12-06 11500 6 8.98 USGS 02335450 1985-09-24 8750 6 7.88 USGS 02335450 1986-08-01 8480 6 7.67 USGS 02335450 1987-09-08 8640 6 7.74 USGS 02335450 1987-10-02 7340 6 7.16 USGS 02335450 1989-08-02 8810 6 7.81 USGS 02335450 1990-03-17 14500 6 9.89 USGS 02335450 1991-09-02 12700 6 9.28 USGS 02335450 1992-08-21 11200 6 8.70 USGS 02335450 1993-01-11 11700 6 8.89 USGS 02335450 1994-06-27 9840 6 8.18 USGS 02335450 1995-03-09 10200 6 8.33 USGS 02335450 1996-01-27 13500 6 9.54 USGS 02335450 1997-09-25 13:15 9960 6 8.23 USGS 02335450 1998-05-08 06:00 12200 6 9.10 USGS 02335450 1999-06-15 01:15 6840 6 6.89 USGS 02335450 2000-09-01 03:15 7830 6 7.34 USGS 02335450 2001-07-31 11:45 8060 6 7.44 USGS 02335450 2002-05-04 10:15 6140 6 6.56 USGS 02335450 2003-03-06 10:30 12500 6 9.20 USGS 02335450 2004-09-17 14600 6 9.94 USGS 02335450 2005-08-13 23:45 12400 6 9.17 USGS 02335450 2006-05-02 03:00 7990 6 7.41 USGS 02335450 2007-06-01 23:30 5560 6 6.27 USGS 02335450 2007-10-19 02:15 7430 6 7.16 USGS 02335450 2009-09-21 21:00 21100 6 11.96 USGS 02335450 2009-10-12 17:00 12600 6 9.23 USGS 02335450 2011-05-06 00:15 9320 6 7.97 USGS 02335450 2011-10-12 01:30 7380 6 7.14 USGS 02335450 2013-05-19 15:30 13800 6 9.67 USGS 02335450 2013-12-06 02:00 9510 6 8.05 USGS 02335450 2015-04-23 02:00 7630 6 7.25 USGS 02335450 2016-01-15 16:00 12900 6 9.35 USGS 02335450 2017-04-05 6050 6 6.47 USGS 02335450 2018-06-07 9150 6 7.90 USGS 02335450 2018-12-28 14:30 14700 6 9.97 USGS 02335450 2020-03-25 04:00 13900 6 9.68 USGS 02335450 2020-10-11 06:45 19600 6 11.51 USGS 02335450 2022-03-13 14:15 9320 6 7.97 USGS 02335450 2023-01-04 13:45 14100 6 9.76 USGS 02335450 2024-09-27 12:30 15900 6 10.37