#
# U.S. Geological Survey
# National Water Information System
# Retrieved: 2025-08-03 05:00:55 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 07091000 CHALK CREEK NEAR NATHROP, CO
#
# 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	07091000	1949-06-00				3.40	Bd					
USGS	07091000	1950-06-02		370		1.96						
USGS	07091000	1951-05-28		448		2.10						
USGS	07091000	1952-06-10		1050		2.70						
USGS	07091000	1953-06-13		720		2.40						
USGS	07091000	1954-05-22		155		1.53						
USGS	07091000	1955-06-09		399		2.02						
USGS	07091000	1956-06-03		640		2.35						
USGS	07091000	1979-00-00		590	Bm	2.59	Bm					
USGS	07091000	1981-07-11		525		2.50						
USGS	07091000	1982-00-00		630	Bm	2.70	Bm					
USGS	07091000	1984-00-00		880	Bm	3.04	Bm					
USGS	07091000	1985-00-00		1020	Bm	3.31	Bm					
USGS	07091000	1986-00-00		1400	Bm	3.55	Bm					
USGS	07091000	1987-00-00		890	Bm	3.05	Bm					
USGS	07091000	1988-00-00		400	Bm	2.23	Bm					
USGS	07091000	1989-00-00		420	Bm	2.27	Bm					
USGS	07091000	1990-00-00		168	Bm	1.65	Bm					
USGS	07091000	1991-06-13		900		3.07						
USGS	07091000	1992-04-28		725		2.85						
USGS	07091000	1993-06-18		890		3.05