The monitoring network within this area

Hydrionis holds 2,618 values from 7 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.

7

Gauges

2,618

Values held

1904–2026

Record spans

Gauges within the Upper Laramie huc8 subbasin

7 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 LITTLE LARAMIE RIVER NEAR FILMORE, WY

The highest instantaneous discharge the publisher recorded in each year — a flood peak as measured, not a daily average of one. 1911–2015.

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	LITTLE LARAMIE RIVER NEAR FILMORE, WY (m³/s)
1911	30.6
1912	40.8
1914	68.0
1915	23.2
1916	20.9
1917	54.4
1918	54.4
1919	27.3
1920	51.0
1921	53.2
1922	29.2
1923	39.6
1924	48.7
1925	27.2
1926	55.2
1933	33.7
1934	9.40
1935	39.9
1936	30.6
1937	26.0
1938	32.3
1939	20.9
1940	18.0
1941	24.5
1942	41.6
1943	47.0
1944	18.5
1945	27.6
1946	29.7
1947	39.1
1948	32.3
1949	48.4
1950	31.7
1951	37.1
1952	35.4
1953	42.8
1954	20.7
1955	10.1
1956	28.6
1957	38.5
1958	31.7
1959	31.7
1960	22.8
1961	22.6
1962	21.7
1963	20.3
1964	25.3
1965	97.7
1966	13.5
1967	30.0
1968	25.2
1969	20.3
1970	39.4
1971	48.4
1972	46.4
1973	26.1
1974	25.3
1975	28.6
1976	18.0
1977	17.5
1978	37.9
1979	41.9
1980	35.4
1981	19.0
1982	42.8
1983	44.7
1984	29.2
1985	28.1
1986	54.9
1987	13.6
1988	32.3
1989	10.9
1990	27.0
1991	26.8
1992	15.8
1993	36.0
1994	27.1
1995	40.5
1996	28.1
1997	37.1
1998	19.9
1999	27.7
2000	21.1
2001	18.3
2002	10.1
2003	28.9
2004	11.7
2005	21.7
2006	25.9
2007	15.7
2008	23.9
2009	38.5
2010	56.9
2011	49.0
2012	11.3
2013	19.3
2014	46.7
2015	32.6

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	1911–2015
Completeness	93.3% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	2 separate periods inside 1911–2015 hold no value. The longest runs from 1927 to 1932 — 6 years with no reading. They are drawn as breaks in the line and are never interpolated across.
Continuity	The record begins in 1911 and is not continuous from it: 105 years separate the first value from the last, and 93% of the years between them are held. The span is not the record.
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 LARAMIE RIVER NEAR GLENDEVEY, 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. 1912–1981.

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
Period	LARAMIE RIVER NEAR GLENDEVEY, CO (mm)
1912	353
1915	209
1916	256
1917	473
1918	398
1919	146
1920	330
1921	354
1922	178
1923	362
1924	310
1925	190
1926	344
1927	243
1928	300
1929	314
1930	181
1931	145
1932	240
1933	255
1934	91.0
1935	218
1936	188
1937	131
1938	291
1939	130
1940	183
1941	206
1942	211
1943	280
1944	159
1945	238
1946	229
1947	314
1948	203
1949	273
1950	200
1951	315
1952	296
1953	152
1954	106
1955	160
1956	268
1957	423
1958	252
1959	232
1960	217
1961	299
1962	327
1963	138
1964	199
1965	326
1966	129
1967	277
1968	245
1969	217
1970	343
1971	340
1972	240
1973	283
1974	280
1975	249
1976	181
1977	96.0
1978	270
1979	289
1980	252
1981	140

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	1912–1981
Completeness	97.1% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	One period inside 1912–1981 holds no value: 1913 to 1914, 2 years with no reading. It is drawn as a break in the line and is never interpolated across.
Continuity	The record begins in 1912 and is not continuous from it: 70 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

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

779

Fullest snowpack recorded at Roach, in 1986 (mm of water)

184

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 Roach

Water years 1981–2026. 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	Roach (mm)
1981	258
1982	469
1983	686
1984	554
1985	413
1986	779
1987	279
1988	456
1989	343
1990	443
1991	401
1992	315
1993	515
1994	369
1995	468
1996	578
1997	623
1998	400
1999	435
2000	363
2001	353
2002	219
2003	452
2004	356
2005	357
2006	399
2007	457
2008	532
2009	454
2010	497
2011	665
2012	317
2013	369
2014	555
2015	279
2016	483
2017	401
2018	350
2019	431
2020	397
2021	381
2022	412
2023	461
2024	356
2025	313
2026	184

Why the snow is not read against the river here

Peak snow water equivalent and Mean river flow, water year overlap for only 1 year at these subjects. A relationship read off a span that short is reading the weather of a few seasons.

Every gauge Hydrionis holds within this area

Gauges within the Upper Laramie and what each holds
Gauge	Measures	Values	Record
LITTLE LARAMIE RIVER NEAR FILMORE, WY	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	240	1911–2026
LARAMIE RIVER NEAR GLENDEVEY, CO	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	238	1904–2026
LARAMIE RIVER NEAR JELM, WY	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	218	1905–2026
LARAMIE RIVER AT TWO RIVERS, WY	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	197	1910–2026
LITTLE LARAMIE RIVER AT TWO RIVERS, WY	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	194	1911–2026
LARAMIE R AND PIONEER CANAL NR WOODS LANDING, WY	catchment area, annual maximum river flow	93	1912–2026
LARAMIE RIVER NEAR LOOKOUT, WY	catchment area, annual maximum river flow	70	1912–2026

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 — 10180010. 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
LITTLE LARAMIE RIVER NEAR FILMORE, WY	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
LARAMIE RIVER NEAR GLENDEVEY, 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
LARAMIE RIVER NEAR JELM, WY	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
LARAMIE RIVER AT TWO RIVERS, WY	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
LITTLE LARAMIE RIVER AT TWO RIVERS, WY	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
LARAMIE R AND PIONEER CANAL NR WOODS LANDING, WY	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
LARAMIE RIVER NEAR LOOKOUT, WY	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 5 of them, which makes it a full profile.

Information-gain signals held for this water body
Signal	Held	Counts
Gauges holding a real record	7	yes, 3 or more
Years spanned	123	yes, 20 or more
Values held	2,618	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-06661000.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), Upper Laramie gauge records, accessed 2026-10-05, hydrionis.com/waters/united-states-upper-laramie/

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 Upper Laramie 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 confidence2015-06-03

Source: USGS — National Water Information System, USGS site 06661000, 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.