Deer Creek Reservoir, Utah — storage

Storage now, against this reservoir's own record

169.97 Mm³

Stored, September 1965

100th

Percentile among 25 Seps on record

+27.6%

Change over the 12 months to 1965-09

Storage in September 1965 was higher than almost every other Sep on record, ranked against 25 other Seps held for this reservoir. It is the highest in the held record for this month.

No percentage departure from the Sep average is published here. No long-term average is held for this month, so there is nothing to compare with.

Storage, 1941–1965

Monthly mean storage

293 monthly values, 1941 to 1965

Monthly means of the publisher's daily record. Volume, not percentage of capacity — see below for why.

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

240 of 293 periods, evenly spaced across the record. Every value is in the download and the API; a table of all 293 would be longer than this page and unusable with a screen reader.
Period	Deer Creek Reservoir Near Charleston, Utah (Mm³)
May 1941	5.38
June 1941	7.24
July 1941	8.20
September 1941	3.57
October 1941	2.84
November 1941	6.50
December 1941	8.33
February 1942	4.49
March 1942	4.15
April 1942	10.9
May 1942	11.6
June 1942	22.1
August 1942	16.5
September 1942	11.8
October 1942	10.7
November 1942	12.4
January 1943	15.3
February 1943	14.9
March 1943	15.0
April 1943	20.3
May 1943	36.0
July 1943	53.8
August 1943	45.8
September 1943	35.6
October 1943	30.3
December 1943	33.8
January 1944	30.9
February 1944	27.9
March 1944	29.4
April 1944	33.5
June 1944	89.1
July 1944	95.3
August 1944	84.6
September 1944	72.3
November 1944	66.5
December 1944	69.1
January 1945	69.3
February 1945	69.8
March 1945	67.9
May 1945	74.9
June 1945	91.7
July 1945	104
August 1945	94.4
October 1945	77.9
November 1945	80.9
December 1945	81.2
January 1946	79.8
February 1946	76.1
April 1946	99.3
May 1946	156
June 1946	185
July 1946	173
September 1946	140
October 1946	134
November 1946	139
December 1946	130
January 1947	107
March 1947	94.1
April 1947	95.1
May 1947	118
June 1947	172
August 1947	169
September 1947	158
October 1947	153
November 1947	155
December 1947	155
February 1948	148
March 1948	152
April 1948	173
May 1948	184
July 1948	172
August 1948	154
September 1948	138
October 1948	132
November 1948	136
January 1949	132
February 1949	128
March 1949	126
April 1949	134
June 1949	189
July 1949	183
August 1949	165
September 1949	151
October 1949	148
December 1949	150
January 1950	147
February 1950	147
March 1950	148
May 1950	174
June 1950	187
July 1950	185
August 1950	172
September 1950	158
November 1950	154
December 1950	161
January 1951	159
February 1951	157
April 1951	161
May 1951	173
June 1951	189
July 1951	183
August 1951	172
October 1951	148
November 1951	148
December 1951	148
January 1952	146
March 1952	139
April 1952	146
May 1952	153
June 1952	187
July 1952	186
September 1952	164
October 1952	153
November 1952	153
December 1952	154
February 1953	153
March 1953	147
April 1953	145
May 1953	140
June 1953	172
August 1953	156
September 1953	135
October 1953	124
November 1953	127
December 1953	123
February 1954	115
March 1954	123
April 1954	133
May 1954	149
July 1954	126
August 1954	105
September 1954	87.6
October 1954	80.6
November 1954	84.2
January 1955	88.0
February 1955	89.8
March 1955	97.4
April 1955	111
June 1955	172
July 1955	152
August 1955	119
September 1955	94.6
October 1955	86.2
December 1955	98.4
January 1956	109
February 1956	112
March 1956	106
May 1956	148
June 1956	188
July 1956	169
August 1956	139
September 1956	114
November 1956	97.8
December 1956	96.3
January 1957	97.3
February 1957	104
April 1957	107
May 1957	124
June 1957	176
July 1957	180
August 1957	155
October 1957	124
November 1957	130
December 1957	130
January 1958	126
March 1958	120
April 1958	119
May 1958	153
June 1958	188
July 1958	169
September 1958	118
October 1958	107
November 1958	109
December 1958	111
February 1959	109
March 1959	110
April 1959	109
May 1959	112
June 1959	135
August 1959	94.3
September 1959	73.6
October 1959	69.1
November 1959	73.2
January 1960	79.3
February 1960	82.3
March 1960	89.9
April 1960	107
May 1960	126
July 1960	128
August 1960	98.4
September 1960	78.2
October 1960	67.4
December 1960	70.5
January 1961	66.9
February 1961	69.9
March 1961	78.1
April 1961	87.1
June 1961	89.5
July 1961	68.3
August 1961	55.4
September 1961	50.9
November 1961	66.2
December 1961	67.1
January 1962	64.2
February 1962	74.4
March 1962	73.3
May 1962	137
June 1962	177
July 1962	182
August 1962	163
October 1962	133
November 1962	140
December 1962	150
January 1963	149
February 1963	157
April 1963	147
May 1963	165
June 1963	188
July 1963	174
September 1963	125
October 1963	120
November 1963	123
December 1963	128
January 1964	125
March 1964	124
April 1964	131
May 1964	152
June 1964	190
August 1964	155
September 1964	133
October 1964	124
November 1964	127
December 1964	138
February 1965	146
March 1965	126
April 1965	117
May 1965	144
July 1965	189
August 1965	184
September 1965	170

Why this page shows a volume and not a percentage

Percentage full is a division, and the denominator is missing

“Percentage full” is the figure a drought is discussed in, and it is stored volume divided by capacity. Capacity is published on several different bases — gross, usable, live, and the figure at a particular spillway or licence condition — and dividing a stored volume by the wrong one produces a percentage confidently wrong by the ratio between them, at exactly the moment the number matters most.

Hydrionis holds storage measurements for this reservoir and does not hold a compatible authoritative capacity figure for it, so percentage full is not calculated. The volume above is what was actually measured. Where you need a percentage, take the publisher’s own capacity on its own stated basis and divide it yourself — the source is linked below, and knowing which basis you used is the whole point.

Rate and persistence

+3.06 Mm³

Mean change per month over 12 months

0 of 24

Recent months below the 20th percentile for their own month

Rates are computed only across an unbroken run of months, so a rate is never divided by a period in which some of the change was not observed. Percentile counts compare each month with the same calendar month in every other year held.

Location

Deer Creek Reservoir Near Charleston, Utah

Gauge location

About this data

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	1941–1965
Completeness	97.7% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	Storage is a managed quantity. A falling line can be a rule curve, a scheduled release or a transfer to another system rather than a shortage of water, and nothing here distinguishes them. No capacity figure on a stated basis is held for this reservoir, so no percentage of capacity is computed.
Continuity	98% of the months between 1941 and 1965 are held. Monthly means of the publisher's own daily 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

Use this data

Machine-readable JSON /api/v1/observations/by-subject/reservoir-usgs-10159000.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), Deer Creek Reservoir Near Charleston, Utah reservoir records, accessed 2026-10-05, hydrionis.com/reservoirs/reservoir-usgs-10159000/

Cite Hydrionis where you rely on the compilation, the normalisation, the eligibility judgements or a chart. Where you use an unmodified published value, the publisher’s attribution is the one that is required; crediting Hydrionis as well is welcome and is not something Hydrionis can require of you.

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 Deer Creek Reservoir Near Charleston, Utah record 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 this comes from

293 monthly observations 1941–1965 Mm³

Spatially aggregatedHigh confidenceSeptember 1965

Source: USGS — National Water Information System, 10159000. Licence: Open.

Method: Monthly mean of daily reservoir storage published by the USGS in acre-feet and converted to millions of cubic metres. Months with fewer than 20 days of record are not published rather than averaged from a partial month.

Reservoir storage is managed as well as observed: a drawdown may reflect an operating rule, flood-control rule curve or scheduled release rather than a shortage. Compare a month against the same month in other years, and do not read a fall as a supply signal without knowing the operating regime.

Retrieved 1 October 2026.

Monthly mean of daily reservoir storage published by the USGS in acre-feet and converted to millions of cubic metres. Months with fewer than 20 days of record are not published rather than averaged from a partial month.