Teller Reservoir, Co. — storage

Storage now, against this reservoir's own record

0.04 Mm³

Stored, July 2018

42nd

Percentile among 34 Juls on record

Storage in July 2018 was around the middle of the Jul record, ranked against 34 other Juls held for this reservoir.

No percentage departure from the Jul average is published here. This month is usually at or near zero here, and a percentage against a near-zero average is arithmetic rather than a finding.

Storage, 1978–2018

Monthly mean storage

416 monthly values, 1978 to 2018

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 416 periods, evenly spaced across the record. Every value is in the download and the API; a table of all 416 would be longer than this page and unusable with a screen reader.
Period	Teller Reservoir Near Stone City, Co. (Mm³)
September 1978	0.070
November 1978	0.042
December 1978	0.039
February 1979	0.033
April 1979	0.014
June 1979	0.119
July 1979	0.184
September 1979	0.117
November 1979	0.079
January 1980	0.066
February 1980	0.058
April 1980	0.037
June 1980	2.23
August 1980	1.65
September 1980	1.46
November 1980	1.12
January 1981	0.978
March 1981	0.911
April 1981	0.858
June 1981	0.720
August 1981	0.734
September 1981	0.661
November 1981	0.523
January 1982	0.485
March 1982	0.519
April 1982	0.497
June 1982	1.22
August 1982	2.26
October 1982	2.15
November 1982	2.13
January 1983	2.05
March 1983	1.98
May 1983	2.13
June 1983	2.16
August 1983	1.87
October 1983	1.50
December 1983	1.35
January 1984	1.34
March 1984	1.27
May 1984	1.15
June 1984	1.03
August 1984	1.30
October 1986	0.805
December 1986	0.731
January 1987	0.721
March 1987	0.713
May 1987	1.97
July 1987	2.01
August 1987	1.77
October 1987	1.44
December 1987	1.30
February 1988	1.28
March 1988	1.27
May 1988	1.12
July 1988	0.922
September 1988	0.746
October 1989	0.234
December 1989	0.196
February 1990	0.183
March 1990	0.177
May 1990	0.168
July 1990	0.167
September 1990	0.121
October 1990	0.070
December 1990	0.051
February 1991	0.039
April 1991	0.014
May 1991	0.0027
July 1991	0
September 1991	0
November 1991	0
December 1991	0
February 1992	0
April 1992	0
May 1992	0.028
July 1992	0.034
September 1992	0.013
November 1992	0.0069
December 1992	0.028
February 1993	0.029
April 1993	0.020
June 1993	0.0008
July 1993	0
September 1993	0
November 1993	0
January 1994	0
February 1994	0
April 1994	0
June 1994	1.21
August 1994	0.734
September 1994	0.638
November 1994	0.494
January 1995	0.425
February 1995	0.402
April 1995	0.360
June 1995	1.69
August 1995	1.18
September 1995	0.819
November 1995	0.644
January 1996	0.749
March 1996	0.813
April 1996	0.820
June 1996	0.710
August 1996	0.668
October 1996	0.544
November 1996	0.508
January 1997	0.474
March 1997	0.472
May 1997	1.29
June 1997	1.60
August 1997	1.44
October 1997	1.34
November 1997	1.38
January 1998	1.43
March 1998	1.38
May 1998	1.53
June 1998	1.25
August 1998	1.13
October 1998	1.09
December 1998	1.05
January 1999	1.06
March 1999	1.04
May 1999	1.66
July 1999	1.36
August 1999	1.44
October 1999	1.33
December 1999	0.987
February 2000	0.662
March 2000	0.658
May 2000	0.627
July 2000	0.496
August 2000	0.438
October 2000	0.312
December 2000	0.247
February 2001	0.229
March 2001	0.224
May 2001	0.189
July 2001	0.076
September 2001	0.037
October 2001	0.027
December 2001	0.013
February 2002	0.0060
April 2002	0.0005
May 2002	0
July 2002	0
September 2002	0
November 2002	0
December 2002	0
February 2003	0
April 2003	0
May 2003	0
July 2003	0
September 2003	0
November 2003	0
December 2003	0
February 2004	0
April 2004	0
June 2004	0
July 2004	0
September 2004	0
November 2004	0
January 2005	0
February 2005	0
April 2005	0
June 2005	0
August 2005	0
September 2005	0
November 2005	0
January 2006	0
February 2006	0
April 2006	0
June 2006	0
August 2006	0
September 2006	0
November 2006	0
January 2007	0
March 2007	0
April 2007	0
June 2007	0
August 2007	0.076
October 2007	0.043
November 2007	0.035
January 2008	0.027
March 2008	0.023
April 2008	0.015
June 2008	0.0048
August 2008	0
October 2008	0
November 2008	0
January 2009	0
March 2009	0
May 2009	0
June 2009	0
August 2009	0
October 2009	0
December 2009	0
January 2010	0
March 2010	0
May 2010	0
July 2010	0
August 2010	0
October 2010	0
December 2010	0
January 2011	0
March 2011	0
May 2011	0
July 2011	0
August 2011	0
October 2011	0
December 2011	0
February 2012	0
March 2012	0
May 2012	0
July 2012	0
September 2012	0
December 2014	0
February 2015	0
April 2015	0
June 2015	1.33
July 2015	0.619
September 2015	0.117
November 2015	0.118
December 2015	0.122
February 2016	0.125
April 2016	0.133
June 2016	0.111
July 2016	0.079
September 2016	0.091
November 2016	0.091
January 2017	0.118
February 2017	0.116
April 2017	0.111
June 2017	0.092
September 2017	0.090
October 2017	0.096
December 2017	0.101
February 2018	0.086
April 2018	0.096
May 2018	0.088
July 2018	0.039

The reservoir's year

Seasonal storage profile

Each calendar month's reference average, against the most recent year

1991–2020 average
Most recent 12 months

Twelve separate averages, one per calendar month. A January average describes Januaries only. Months are plotted 1–12.

View the data behind this chart

Underlying data
Period	1991–2020 average (Mm³)	Most recent 12 months (Mm³)
Jan	0.210	0.089
Feb	0.210	0.086
Mar	0.210	0.093
Apr	0.210	0.096
May	0.350	0.088
Jun	0.400	0.065
Jul	0.320	0.039
Aug	0.300	0.114
Sep	0.270	0.090
Oct	0.260	0.096
Nov	0.250	0.102
Dec	0.230	0.101

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

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

Teller Reservoir Near Stone City, Co.

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	1978–2018
Completeness	84.6% 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	85% of the months between 1978 and 2018 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-07099233.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), Teller Reservoir Near Stone City, Co. reservoir records, accessed 2026-10-05, hydrionis.com/reservoirs/reservoir-usgs-07099233/

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 Teller Reservoir Near Stone City, Co. 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

416 monthly observations 1978–2018 Mm³

Spatially aggregatedHigh confidenceJuly 2018

Source: USGS — National Water Information System, 07099233. 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.