# # U.S. Geological Survey # National Water Information System # Retrieved: 2024-11-23 08:26:01 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 08181400 Helotes Ck at Helotes, TX # # 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 08181400 1969-05-16 184 3.10 USGS 08181400 1970-05-26 2040 5.43 USGS 08181400 1971-08-13 346 3.24 USGS 08181400 1972-05-07 1740 5.10 USGS 08181400 1973-07-16 7680 10.80 USGS 08181400 1974-09-12 1690 5.05 USGS 08181400 1975-02-04 44.0 2.06 USGS 08181400 1976-04-18 2090 5.51 USGS 08181400 1976-10-24 1810 5.21 USGS 08181400 1977-11-01 1970 5.37 USGS 08181400 1979-06-01 592 3.40 USGS 08181400 1979-11-17 18.0 1.91 USGS 08181400 1981-06-14 1260 4.47 USGS 08181400 1982-05-16 856 3.86 USGS 08181400 1983-07-17 15.0 1.81 USGS 08181400 1984-05-28 21.0 1.87 USGS 08181400 1985-06-05 3910 7.35 USGS 08181400 1986-05-31 640 3.59 USGS 08181400 1987-06-11 7140 10.33 USGS 08181400 1988-07-27 64.0 2.27 USGS 08181400 1989-01-29 60.0 2.24 USGS 08181400 1990-07-31 116 2.65 USGS 08181400 1991-05-03 2460 6.01 USGS 08181400 1992-05-21 2840 6.33 USGS 08181400 1993-05-05 420 3.50 USGS 08181400 1994-05-13 83.0 2.52 USGS 08181400 1995-04-04 74.0 2.46 USGS 08181400 1995-10-31 24.0 2.03 USGS 08181400 1997-06-22 4560 7.96 USGS 08181400 1998-03-16 944 4.38 USGS 08181400 1998-10-18 12600 15.21 USGS 08181400 1999-10-17 51.0 2.10 USGS 08181400 2000-10-23 1980 5.51 USGS 08181400 2002-07-02 10900 13.76 USGS 08181400 2002-10-24 116 2.60 USGS 08181400 2004-06-29 367 3.59 USGS 08181400 2004-10-02 13:45 79.0 2.34 USGS 08181400 2006-05-06 07:45 52.0 2.25 USGS 08181400 2007-08-16 17:45 9280 10.58 USGS 08181400 2008-08-24 16:30 22.0 2.20 USGS 08181400 2009-09-10 11:15 29.0 2.30 USGS 08181400 2010-05-14 13:15 1580 4.38 USGS 08181400 2011-01-09 02:30 7.70 1.85 USGS 08181400 2011-10-09 03:00 148 2.68 USGS 08181400 2013-05-25 06:30 928 3.75 USGS 08181400 2014-07-18 251 2.90 USGS 08181400 2015-05-30 17:45 4010 6.65 USGS 08181400 2015-10-10 08:00 6260 8.11 USGS 08181400 2017-08-07 06:00 87.3 2.56 USGS 08181400 2018-09-09 09:30 5380 7.40 USGS 08181400 2019-06-30 05:20 1250 4.29 USGS 08181400 2019-10-24 21:30 21.0 2.09 USGS 08181400 2021-07-06 10:25 4200 6.45 USGS 08181400 2021-10-14 00:20 420 3.51 USGS 08181400 2023-06-04 19:15 145 2.60