HydrionisGlobal Water Intelligence
HUC8 subbasin

Huerfano

2 monitoring stations within this area in United States, holding 814 values between 1922 and 2026. A United States federal hydrologic unit at the eight-digit subbasin level — a drainage area, not a river. Many subbasins take the name of the largest river within them, and the gauges below are anywhere inside the area, including on tributaries.

United StatesHUC8 subbasin

The monitoring network within this area

Hydrionis holds 814 values from 2 gauges within it. Discharge is a property of a gauge and its reach, not of this drainage area, so this page reports the network and its records rather than a single figure.

2
Gauges
814
Values held
1922–2026
Record spans
Gauges within the Huerfano huc8 subbasin
2 monitoring points, positioned as the publisher records them.
Gauges within the Huerfano huc8 subbasinHUERFANO R AT MANZANARES XING, NR REDWING, CO., HUERFANO RIVER NEAR BOONE, CO.HUERFANO R AT MANZANARES XING, NR REDWING, CO.HUERFANO RIVER NEAR BOONE, CO.

Flood peaks, as measured

This gauge's flood record, as measured. Unlike a daily mean it is the discharge at the moment the river was highest, which is the figure flood frequency analysis is built on.

Largest measured flow of each year at HUERFANO R AT MANZANARES XING, NR REDWING, CO.
The highest instantaneous discharge the publisher recorded in each year — a flood peak as measured, not a daily average of one. 1924–1982.
Largest measured flow of each year at HUERFANO R AT MANZANARES XING, NR REDWING, CO.Largest measured flow of each year at HUERFANO R AT MANZANARES XING, NR REDWING, CO.: HUERFANO R AT MANZANARES XING, NR REDWING, CO. in m³/s, from 1924 to 1982.0100200300m³/s19241931193819451952196119681975HUERFANO R AT MANZANARES XING, NR REDWING, CO. 1924: 6.94 m³/sHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1925: 8.35 m³/sHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1926: 7.65 m³/sHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1927: 5.44 m³/sHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1928: 6.68 m³/sHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1929: 22.1 m³/sHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1930: 6.74 m³/sHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1931: 6.51 m³/sHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1932: 9.34 m³/sHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1933: 13.6 m³/sHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1934: 46.7 m³/sHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1935: 39.6 m³/sHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1936: 26.1 m³/sHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1937: 12.1 m³/sHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1938: 7.70 m³/sHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1939: 4.33 m³/sHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1940: 8.24 m³/sHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1941: 22.4 m³/sHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1942: 14.5 m³/sHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1943: 5.66 m³/sHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1944: 9.51 m³/sHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1945: 22.1 m³/sHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1946: 19.8 m³/sHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1947: 10.8 m³/sHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1948: 7.39 m³/sHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1949: 6.29 m³/sHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1950: 3.23 m³/sHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1951: 289 m³/sHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1952: 22.0 m³/sHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1954: 2.78 m³/sHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1955: 4.19 m³/sHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1957: 27.2 m³/sHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1958: 4.53 m³/sHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1959: 2.80 m³/sHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1960: 4.22 m³/sHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1961: 5.15 m³/sHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1962: 2.89 m³/sHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1963: 3.28 m³/sHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1964: 1.76 m³/sHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1965: 6.46 m³/sHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1966: 68.5 m³/sHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1967: 30.0 m³/sHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1968: 10.1 m³/sHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1969: 5.38 m³/sHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1970: 4.59 m³/sHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1971: 1.81 m³/sHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1972: 185 m³/sHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1973: 9.91 m³/sHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1974: 1.25 m³/sHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1975: 3.40 m³/sHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1976: 3.17 m³/sHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1978: 1.81 m³/sHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1979: 5.32 m³/sHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1980: 6.12 m³/sHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1981: 2.72 m³/sHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1982: 2.89 m³/s

Published by the gauge's own operator from its sub-daily record; Hydrionis stores the figure rather than recomputing it. A year the gauge did not cover produces no value rather than a low one, and the gaps are stated below the chart. A peak is a property of this gauge and its reach: a larger flood upstream or downstream of it is not in this series.

What the shaded periods are (0 events)

Not shown on this chart

  • The 1976 drought — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
  • The 2022 drought — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
  • Yorkshire drought — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
  • Cantareira water crisis, São Paulo — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
  • Cape Town Day Zero — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
  • European drought — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
View the data behind this chart
Underlying data
PeriodHUERFANO R AT MANZANARES XING, NR REDWING, CO. (m³/s)
19246.94
19258.35
19267.65
19275.44
19286.68
192922.1
19306.74
19316.51
19329.34
193313.6
193446.7
193539.6
193626.1
193712.1
19387.70
19394.33
19408.24
194122.4
194214.5
19435.66
19449.51
194522.1
194619.8
194710.8
19487.39
19496.29
19503.23
1951289
195222.0
19542.78
19554.19
195727.2
19584.53
19592.80
19604.22
19615.15
19622.89
19633.28
19641.76
19656.46
196668.5
196730.0
196810.1
19695.38
19704.59
19711.81
1972185
19739.91
19741.25
19753.40
19763.17
19781.81
19795.32
19806.12
19812.72
19822.89

About this series

Everything below is a property of the data rather than a rating of it. There is deliberately no single confidence score: how much a gap matters depends on what you are about to do with the series, and only you know that.

Source
United States Geological Survey — National Water Information System · US Government work — public domain
How the values came to existMeasured
Period held1924–1982
Completeness94.9% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps
  • 3 separate periods inside 1924–1982 hold no value. They are drawn as breaks in the line and are never interpolated across.
ContinuityThe record begins in 1924 and is not continuous from it: 59 years separate the first value from the last, and 95% of the years between them are held. The span is not the record.
Last read from the publisher2026-10-01
RedistributionPermitted by the upstream licences
Commercial reusePermitted by the upstream licences. No Hydrionis access tier can widen this.
MethodologyHow this was produced

How much of the rain came back out

A discharge in cubic metres per second cannot be compared with anything: the larger number may only mean the larger catchment. Divided by the area draining to the gauge it becomes a depth of water over that land, which answers a question a reader already has — of the rain that fell here, how much came back out as river?

Water leaving the catchment above HUERFANO R AT MANZANARES XING, NR REDWING, CO., as a depth
The year's flow spread over the land draining to this gauge, in millimetres — the same unit rainfall is measured in. 1924–1981.
Water leaving the catchment above HUERFANO R AT MANZANARES XING, NR REDWING, CO., as a depthWater leaving the catchment above HUERFANO R AT MANZANARES XING, NR REDWING, CO., as a depth: HUERFANO R AT MANZANARES XING, NR REDWING, CO. in mm, from 1924 to 1981.100200300mm19241932194019481956196419721981HUERFANO R AT MANZANARES XING, NR REDWING, CO. 1924: 205 mmHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1925: 111 mmHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1926: 179 mmHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1927: 140 mmHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1928: 160 mmHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1929: 202 mmHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1930: 127 mmHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1931: 148 mmHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1932: 195 mmHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1933: 164 mmHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1934: 103 mmHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1935: 174 mmHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1936: 164 mmHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1937: 202 mmHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1938: 216 mmHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1939: 107 mmHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1940: 89.0 mmHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1941: 306 mmHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1942: 261 mmHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1943: 108 mmHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1944: 236 mmHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1945: 148 mmHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1946: 85.0 mmHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1947: 196 mmHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1948: 221 mmHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1949: 212 mmHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1950: 68.0 mmHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1951: 92.0 mmHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1952: 144 mmHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1953: 106 mmHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1954: 87.0 mmHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1955: 115 mmHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1956: 60.0 mmHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1957: 250 mmHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1958: 148 mmHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1959: 117 mmHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1960: 170 mmHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1961: 170 mmHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1962: 144 mmHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1963: 77.0 mmHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1964: 67.0 mmHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1965: 173 mmHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1966: 105 mmHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1967: 112 mmHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1968: 171 mmHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1969: 138 mmHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1970: 174 mmHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1971: 92.0 mmHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1972: 83.0 mmHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1973: 218 mmHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1974: 69.0 mmHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1975: 134 mmHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1976: 109 mmHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1978: 68.0 mmHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1979: 168 mmHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1980: 187 mmHUERFANO R AT MANZANARES XING, NR REDWING, CO. 1981: 85.0 mm

Computed by Hydrionis from the published annual mean flow and the catchment area the station's own publisher states. It is not a water balance: the difference between rainfall and runoff is not evaporation alone but also change in groundwater storage, water abstracted and taken elsewhere, and water imported by transfer schemes — which is why a catchment can yield more runoff than the rain that fell on it without anything being measured wrongly. A different area figure rescales every value here by the ratio between them.

What the shaded periods are (0 events)

Not shown on this chart

  • The 1976 drought — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
  • The 2022 drought — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
  • Yorkshire drought — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
  • Cantareira water crisis, São Paulo — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
  • Cape Town Day Zero — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
  • European drought — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
View the data behind this chart
Underlying data
PeriodHUERFANO R AT MANZANARES XING, NR REDWING, CO. (mm)
1924205
1925111
1926179
1927140
1928160
1929202
1930127
1931148
1932195
1933164
1934103
1935174
1936164
1937202
1938216
1939107
194089.0
1941306
1942261
1943108
1944236
1945148
194685.0
1947196
1948221
1949212
195068.0
195192.0
1952144
1953106
195487.0
1955115
195660.0
1957250
1958148
1959117
1960170
1961170
1962144
196377.0
196467.0
1965173
1966105
1967112
1968171
1969138
1970174
197192.0
197283.0
1973218
197469.0
1975134
1976109
197868.0
1979168
1980187
198185.0

About this series

Everything below is a property of the data rather than a rating of it. There is deliberately no single confidence score: how much a gap matters depends on what you are about to do with the series, and only you know that.

Source
United States Geological Survey — National Water Information System · US Government work — public domain
How the values came to existDerived Computed by Hydrionis
Period held1924–1981
Completeness98.3% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps
  • One period inside 1924–1981 holds no value: 1977. It is drawn as a break in the line and is never interpolated across.
ContinuityThe record begins in 1924 and is not continuous from it: 58 years separate the first value from the last, and 98% of the years between them are held. The span is not the record.
Inputs last read2026-10-01 · when the records this was computed from were last read from their publishers
Calculation date2026-08-24 · when the calculation method was last versioned, not a reading of any publisher
RedistributionPermitted by the upstream licences
Commercial reusePermitted by the upstream licences. No Hydrionis access tier can widen this.
MethodologyHow this was produced

The snow standing above this water

1 automated snow station sits inside this drainage area, weighing the snowpack rather than measuring how deep it is.

389
Fullest snowpack recorded at Apishapa, in 2008 (mm of water)
8
Thinnest, in 2026 (mm of water)
March
Month the pack is usually at its fullest
May
Month the pack has gone by, in half of years
Peak snowpack at Apishapa
Water years 1981–2026. Each point is the fullest month of that snow season.
Peak snowpack at ApishapaPeak snowpack at Apishapa: Apishapa in mm, from 1981 to 2026.0100200300400mm19811987199319992005201120172023Apishapa 1981: 60.0 mmApishapa 1982: 213 mmApishapa 1983: 350 mmApishapa 1984: 353 mmApishapa 1985: 162 mmApishapa 1986: 75.0 mmApishapa 1987: 363 mmApishapa 1988: 183 mmApishapa 1989: 206 mmApishapa 1990: 97.0 mmApishapa 1991: 156 mmApishapa 1992: 225 mmApishapa 1993: 353 mmApishapa 1994: 176 mmApishapa 1995: 138 mmApishapa 1996: 103 mmApishapa 1997: 99.0 mmApishapa 1998: 236 mmApishapa 1999: 111 mmApishapa 2000: 148 mmApishapa 2001: 113 mmApishapa 2002: 103 mmApishapa 2003: 138 mmApishapa 2004: 149 mmApishapa 2005: 304 mmApishapa 2006: 31.0 mmApishapa 2007: 287 mmApishapa 2008: 389 mmApishapa 2009: 215 mmApishapa 2010: 220 mmApishapa 2011: 131 mmApishapa 2012: 187 mmApishapa 2013: 121 mmApishapa 2014: 68.0 mmApishapa 2015: 61.0 mmApishapa 2016: 139 mmApishapa 2017: 223 mmApishapa 2018: 26.0 mmApishapa 2019: 298 mmApishapa 2020: 143 mmApishapa 2021: 186 mmApishapa 2022: 148 mmApishapa 2023: 57.0 mmApishapa 2024: 162 mmApishapa 2025: 76.0 mmApishapa 2026: 8.00 mm

A water year runs October to September and is named for the year it ends, so the snow of one winter stays in one point. The value is the fullest month, not the fullest day: a pack that peaked sharply mid-month reads lower here than a single measurement taken at the right moment would.

View the data behind this chart
Underlying data
PeriodApishapa (mm)
198160.0
1982213
1983350
1984353
1985162
198675.0
1987363
1988183
1989206
199097.0
1991156
1992225
1993353
1994176
1995138
1996103
199799.0
1998236
1999111
2000148
2001113
2002103
2003138
2004149
2005304
200631.0
2007287
2008389
2009215
2010220
2011131
2012187
2013121
201468.0
201561.0
2016139
2017223
201826.0
2019298
2020143
2021186
2022148
202357.0
2024162
202576.0
20268.00

Why the snow is not read against the river here

These two series do not overlap in time: Peak snow water equivalent runs 1980–2026 and Mean river flow, water year runs 1923–1980.

Every gauge Hydrionis holds within this area

GaugeMeasuresValuesRecord
HUERFANO R AT MANZANARES XING, NR REDWING, CO.burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year2071923–2026
HUERFANO RIVER NEAR BOONE, CO.catchment area, annual maximum river flow511922–2026

How these gauges were attached to this water

Assigned by the publisher to a numbered basin Every gauge here is assigned to this drainage area by its own publisher, which issues the area an official code — 11020006. A drainage area is not a river: it contains the tributaries as well as the main channel, and a gauge in it may be on any of them.

GaugeEvidenceEstablished
HUERFANO R AT MANZANARES XING, NR REDWING, CO.Stated by the publisher — USGS site service, huc_cd field — https://waterservices.usgs.gov/nwis/site/ ; named from the USGS Watershed Boundary Dataset 8-digit HU (Subbasin) layer — https://hydro.nationalmap.gov/arcgis/rest/services/wbd/MapServer/42026-10-02
HUERFANO RIVER NEAR BOONE, CO.Stated by the publisher — USGS site service, huc_cd field — https://waterservices.usgs.gov/nwis/site/ ; named from the USGS Watershed Boundary Dataset 8-digit HU (Subbasin) layer — https://hydro.nationalmap.gov/arcgis/rest/services/wbd/MapServer/42026-10-02

What this record holds

Hydrionis decides which waters get a page, and which of those are offered to search, from what is actually held rather than from how the page reads. Five signals are counted; this record has 3 of them, which makes it a full profile.

SignalHeldCounts
Gauges holding a real record2no
Years spanned105yes, 20 or more
Values held814no
Distinct measurements6yes, 2 or more
Publishers measuring it2yes, 2 or more
Official identifiers1recorded, not counted

Use this data

Use this data

No bulk download is offered here, which is a licence position rather than a product one: at least one contributing publisher does not permit redistribution. The values can be read on the page, cited, and pointed to at source.

Attribution and citation

Suggested citation for Hydrionis

Hydrionis (2026), Huerfano gauge records, accessed 2026-10-05, hydrionis.com/waters/united-states-huerfano/

Cite Hydrionis where you rely on values Hydrionis computed, on the method that produced them, or on the compilation itself. The underlying measurements remain the publishers’ and their attribution requirements apply to you directly.

Recommended, not required. Hydrionis does not claim rights over unmodified public data it relayed, and doing arithmetic on somebody else’s measurements does not make them Hydrionis’s. Cite the version and the access date: the Huerfano gauge records changes as publishers release and as methods are revised, and a citation without both cannot be checked later. Full guidance is on cite and reuse.

None of the contributing licences requires attribution. Crediting the publishers is still good practice and they are listed above.

Where these figures come from

MeasuredHigh confidence1982-09-17

Source: USGS — National Water Information System, USGS site 07111000, annual peak streamflow. Licence: Open.

Method: The instantaneous maximum discharge of each water year as published by USGS, dated to the day it occurred. One value per October-to-September water year; where the publisher lists both a systematic and a historic peak for a year, the larger is the annual maximum. Values the publisher marks as maximum daily averages are not held here, because they are not instantaneous peaks. Values marked as bounded rather than measured are held as censored observations carrying the bound. Cubic feet per second are converted to cubic metres per second and the publisher unit is recorded alongside.

Rating curves are extrapolated at extreme discharges, so the largest values in a peak series carry the largest measurement uncertainty. Data from the U.S. Geological Survey National Water Information System, a work of the United States government and therefore in the public domain.

Retrieved 1 October 2026.

Hydrionis would like to measure which pages are read, using HEKNO Analytics, which HEKNO Ltd runs itself, and Google Analytics. Google Analytics stores an identifier on your device, so we only do this if you agree. Nothing is measured if you decline, and the site works identically either way. See cookies for what is set and how to change your mind.