The monitoring network within this area

Hydrionis holds 2,430 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

2,430

Values held

1882–2026

Record spans

Gauges within the Cache La Poudre huc8 subbasin

2 monitoring points, positioned as the publisher records them.

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 CACHE LA POUDRE RIV AT MO OF CN, NR FT COLLINS, CO

The highest instantaneous discharge the publisher recorded in each year — a flood peak as measured, not a daily average of one. 1882–2007.

Show relevant events (1 event)Shading marks when something was recorded, not what caused the line.

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 (1 event)

A shaded period marks when something was recorded, not what caused the shape of the line. Where the two coincide, they coincided.

Documented record — A documented event, compiled from cited sources after it happened. The dates are as good as the record, which for older events can mean the month rather than the day.

Event	Type	Period	Standing	Authority
Hurricane Katrina water and sanitation collapse	Flood	2005-08-29 – 2005-09-30	Documented record	Compiled record

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
Period	CACHE LA POUDRE RIV AT MO OF CN, NR FT COLLINS, CO (m³/s)
1882	49.0
1883	224
1884	194
1885	114
1886	136
1887	85.0
1888	51.0
1889	59.5
1890	53.8
1891	595
1892	90.6
1893	90.6
1894	113
1895	113
1896	70.8
1897	93.4
1898	53.8
1899	119
1900	142
1901	340
1902	70.8
1903	116
1904	0
1905	133
1906	85.0
1907	113
1908	76.5
1909	167
1910	63.4
1911	69.9
1912	108
1913	76.5
1914	152
1915	76.5
1916	66.3
1917	198
1918	147
1919	47.3
1920	128
1921	148
1922	126
1923	242
1924	211
1925	50.4
1926	123
1927	68.2
1928	115
1929	97.1
1930	289
1931	64.6
1932	90.6
1933	99.1
1934	47.0
1935	116
1936	92.9
1937	57.2
1938	175
1939	73.1
1940	99.4
1941	61.7
1942	93.4
1943	95.7
1944	78.4
1945	59.7
1946	82.1
1947	132
1948	80.7
1949	172
1950	82.4
1951	131
1952	104
1953	70.5
1954	34.5
1955	52.1
1956	86.1
1957	124
1958	107
1959	75.9
1960	73.1
1961	83.8
1962	69.1
1963	41.1
1964	54.9
1965	136
1966	33.4
1967	62.6
1968	74.5
1969	67.7
1970	86.4
1971	110
1972	96.3
1973	107
1974	83.3
1975	71.1
1976	208
1977	49.3
1978	106
1979	93.2
1980	109
1981	68.5
1982	89.8
1983	187
1984	113
1985	99.7
1986	111
1987	47.3
1988	77.6
1989	44.5
1990	71.4
1991	128
1992	48.7
1993	77.3
1994	52.4
1995	134
1996	80.1
1997	93.7
1998	53.2
1999	165
2000	50.7
2001	49.3
2002	24.9
2003	107
2004	45.3
2005	64.3
2006	51.0
2007	56.9

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 exist	Measured
Period held	1882–2007
Completeness	100.0% of the periods in that span are held.
Continuity	Continuous: every year from 1882 to 2007 is held.
Last read from the publisher	2026-10-01
Redistribution	Permitted by the upstream licences
Commercial reuse	Permitted by the upstream licences. No Hydrionis access tier can widen this.
Methodology	How 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 CACHE LA POUDRE RIV AT MO OF CN, NR FT COLLINS, 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. 1885–2006.

Show relevant events (1 event)Shading marks when something was recorded, not what caused the line.

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 (1 event)

A shaded period marks when something was recorded, not what caused the shape of the line. Where the two coincide, they coincided.

Documented record — A documented event, compiled from cited sources after it happened. The dates are as good as the record, which for older events can mean the month rather than the day.

Event	Type	Period	Standing	Authority
Hurricane Katrina water and sanitation collapse	Flood	2005-08-29 – 2005-09-30	Documented record	Compiled record

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
Period	CACHE LA POUDRE RIV AT MO OF CN, NR FT COLLINS, CO (mm)
1885	222
1886	140
1887	140
1888	82.0
1889	92.0
1890	110
1891	129
1892	96.0
1893	104
1894	148
1895	171
1896	106
1897	158
1898	88.0
1899	185
1900	223
1901	155
1902	86.0
1905	162
1906	135
1907	176
1908	120
1911	113
1912	145
1913	103
1914	179
1915	111
1916	124
1917	233
1918	142
1919	73.0
1920	165
1921	179
1922	92.0
1923	206
1924	200
1925	103
1926	167
1927	119
1928	136
1929	147
1930	102
1931	76.0
1932	116
1933	125
1934	60.0
1935	129
1936	133
1937	102
1938	160
1939	95.0
1940	77.0
1941	101
1942	148
1943	151
1944	101
1945	120
1946	98.0
1947	143
1948	100
1949	154
1950	95.0
1951	136
1952	122
1953	74.0
1954	45.0
1955	65.0
1956	96.0
1957	148
1958	107
1959	98.0
1960	91.0
1961	131
1962	115
1963	50.0
1964	71.0
1965	128
1966	44.0
1967	76.0
1968	97.0
1969	87.0
1970	120
1971	140
1972	80.0
1973	148
1974	119
1975	99.0
1976	71.0
1977	42.0
1978	122
1979	133
1980	194
1981	59.0
1982	116
1983	297
1984	174
1985	88.0
1986	143
1987	60.0
1988	88.0
1989	58.0
1990	97.0
1991	93.0
1992	80.0
1993	106
1994	68.0
1995	142
1996	121
1997	137
1998	110
1999	152
2000	68.0
2001	63.0
2002	28.0
2003	100
2004	74.0
2005	94.0
2006	67.0

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 exist	Derived Computed by Hydrionis
Period held	1885–2006
Completeness	96.7% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	2 separate periods inside 1885–2006 hold no value. The longest runs from 1903 to 1904 — 2 years with no reading. They are drawn as breaks in the line and are never interpolated across.
Continuity	The record begins in 1885 and is not continuous from it: 122 years separate the first value from the last, and 97% of the years between them are held. The span is not the record.
Inputs last read	2026-10-01 · when the records this was computed from were last read from their publishers
Calculation date	2026-08-24 · when the calculation method was last versioned, not a reading of any publisher
Redistribution	Permitted by the upstream licences
Commercial reuse	Permitted by the upstream licences. No Hydrionis access tier can widen this.
Methodology	How this was produced

The snow standing above this water

5 automated snow stations sit inside this drainage area, weighing the snowpack rather than measuring how deep it is.

794

Fullest snowpack recorded at Deadman Hill, in 2011 (mm of water)

240

Thinnest, in 2026 (mm of water)

April

Month the pack is usually at its fullest

June

Month the pack has gone by, in half of years

Peak snowpack at Deadman Hill

Water years 1979–2026. Each point is the fullest month of that snow season.

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
Period	Deadman Hill (mm)
1979	513
1980	533
1981	330
1982	546
1983	648
1984	543
1985	420
1986	693
1987	310
1988	504
1989	448
1990	423
1991	420
1992	406
1993	502
1994	474
1995	602
1996	622
1997	487
1998	408
1999	495
2000	412
2001	353
2002	265
2003	457
2004	356
2005	411
2006	417
2007	367
2008	518
2009	496
2010	550
2011	794
2012	407
2013	403
2014	661
2015	437
2016	553
2017	530
2018	555
2019	555
2020	514
2021	507
2022	504
2023	514
2024	524
2025	441
2026	240

Read against the river

Deadman Hill and CACHE LA POUDRE RIV AT MO OF CN, NR FT COLLINS, CO both sit in this drainage area, and their records overlap by 27 years. That is the span the two have in common, not a count of years both actually hold — either record may have gaps inside it. The two are shown separately rather than on one axis: millimetres of stored water and cubic metres per second are not commensurable, and a difference between them would mean nothing.

Being in the same drainage area does not put the snowpack upstream of the gauge. A subbasin is an area, and snow on one tributary can join the river below a gauge on another — so a weak relationship here may say more about which tributary was measured than about the snow.

Every gauge Hydrionis holds within this area

Gauges within the Cache La Poudre and what each holds
Gauge	Measures	Values	Record
CACHE LA POUDRE RIV AT MO OF CN, NR FT COLLINS, CO	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	399	1882–2026
CACHE LA POUDRE RIVER NEAR GREELEY, CO.	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	271	1903–2026

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 — 10190007. 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.

What each gauge’s link to this water rests on
Gauge	Evidence	Established
CACHE LA POUDRE RIV AT MO OF CN, NR FT COLLINS, 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/4	2026-10-02
CACHE LA POUDRE RIVER NEAR GREELEY, 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/4	2026-10-02

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 4 of them, which makes it a full profile.

Information-gain signals held for this water body
Signal	Held	Counts
Gauges holding a real record	2	no
Years spanned	145	yes, 20 or more
Values held	2,430	yes, 1000 or more
Distinct measurements	6	yes, 2 or more
Publishers measuring it	2	yes, 2 or more
Official identifiers	1	recorded, not counted

Use this data

Machine-readable JSON /api/v1/observations/by-subject/gauge-usgs-06752000.json
How to cite this, and who you must credit
How these figures were produced
Request this at a different scale, format or geography

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), Cache La Poudre gauge records, accessed 2026-10-05, hydrionis.com/waters/united-states-cache-la-poudre/

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 Cache La Poudre 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 confidence2007-06-16

Source: USGS — National Water Information System, USGS site 06752000, 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.