Canyon Ferry Lake — storage

Storage now, against this reservoir's own record

1,878.21 Mm³

Stored, September 2026

22nd

Percentile among 74 Seps on record

-6.5%

Against the Sep 1991–2020 average

+4.4%

Change over the 12 months to 2026-09

Storage in September 2026 was lower than most Seps on record, ranked against 74 other Seps held for this reservoir.

Storage, 1953–2026

Monthly mean storage

882 monthly values, 1953 to 2026

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 882 periods, evenly spaced across the record. Every value is in the download and the API; a table of all 882 would be longer than this page and unusable with a screen reader.
Period	Canyon Ferry Lake (Mm³)
April 1953	81.7
August 1953	949
November 1953	1,157
March 1954	1,050
July 1954	1,723
October 1954	1,769
February 1955	1,575
June 1955	2,101
September 1955	2,358
January 1956	2,089
May 1956	2,117
September 1956	2,240
December 1956	2,186
April 1957	1,808
August 1957	2,315
November 1957	2,229
March 1958	1,948
July 1958	2,451
October 1958	2,101
February 1959	2,091
June 1959	2,458
September 1959	2,410
January 1960	2,154
May 1960	2,407
August 1960	2,229
December 1960	1,929
April 1961	1,842
August 1961	1,705
November 1961	1,785
March 1962	1,546
July 1962	2,523
October 1962	2,397
February 1963	2,430
June 1963	2,495
September 1963	2,266
January 1964	2,148
May 1964	2,231
August 1964	2,436
December 1964	2,374
April 1965	1,985
July 1965	2,506
November 1965	2,141
March 1966	1,893
July 1966	1,961
October 1966	1,706
February 1967	1,534
June 1967	2,178
September 1967	2,129
January 1968	2,173
May 1968	1,685
August 1968	2,235
December 1968	2,240
April 1969	1,859
July 1969	2,392
November 1969	2,306
March 1970	1,980
June 1970	2,236
October 1970	2,193
February 1971	1,992
May 1971	1,653
September 1971	2,250
January 1972	2,124
May 1972	1,859
August 1972	2,181
December 1972	1,939
April 1973	1,862
July 1973	2,322
November 1973	2,283
March 1974	1,883
June 1974	2,282
October 1974	2,056
February 1975	1,842
May 1975	1,701
September 1975	2,385
January 1976	2,224
April 1976	1,872
August 1976	2,305
December 1976	2,379
April 1977	2,128
July 1977	2,333
November 1977	2,302
March 1978	1,788
June 1978	2,269
October 1978	2,208
February 1979	1,749
May 1979	1,978
September 1979	2,091
January 1980	1,945
April 1980	1,874
August 1980	2,198
December 1980	2,283
March 1981	1,960
July 1981	2,367
November 1981	2,206
March 1982	1,835
June 1982	2,193
October 1982	2,264
February 1983	2,132
May 1983	1,970
September 1983	2,272
January 1984	2,181
April 1984	1,941
August 1984	2,349
December 1984	1,971
March 1985	1,700
July 1985	2,083
November 1985	2,072
February 1986	1,830
June 1986	2,338
October 1986	2,208
January 1987	2,000
May 1987	1,955
September 1987	1,940
January 1988	1,835
April 1988	1,808
August 1988	1,932
December 1988	1,785
March 1989	1,563
July 1989	1,924
November 1989	1,906
February 1990	1,790
June 1990	2,104
October 1990	1,994
January 1991	1,890
May 1991	1,859
September 1991	1,965
December 1991	1,987
April 1992	1,795
August 1992	1,903
December 1992	1,946
March 1993	1,747
July 1993	2,423
November 1993	2,294
February 1994	1,901
June 1994	2,158
October 1994	1,818
January 1995	1,873
May 1995	1,860
September 1995	2,227
December 1995	2,264
April 1996	1,744
August 1996	2,210
November 1996	2,119
March 1997	1,564
July 1997	2,437
October 1997	2,281
February 1998	2,100
June 1998	2,365
October 1998	2,038
January 1999	2,072
May 1999	1,708
September 1999	2,046
December 1999	1,964
April 2000	1,783
August 2000	1,866
November 2000	1,776
March 2001	1,826
July 2001	1,988
October 2001	1,704
February 2002	1,721
June 2002	2,109
September 2002	2,110
January 2003	1,995
May 2003	2,092
September 2003	1,951
December 2003	1,842
April 2004	1,703
August 2004	1,792
November 2004	1,730
March 2005	1,702
July 2005	2,332
October 2005	1,875
February 2006	1,689
June 2006	2,174
September 2006	1,931
January 2007	1,869
May 2007	2,084
August 2007	2,047
December 2007	1,818
April 2008	1,745
August 2008	2,249
November 2008	2,142
March 2009	1,888
July 2009	2,364
October 2009	2,084
February 2010	1,953
June 2010	2,321
September 2010	2,191
January 2011	1,910
May 2011	1,647
August 2011	2,315
December 2011	2,052
April 2012	1,926
July 2012	2,276
November 2012	1,929
March 2013	1,817
June 2013	1,976
October 2013	1,801
February 2014	1,797
June 2014	2,145
September 2014	2,122
January 2015	1,938
May 2015	2,007
August 2015	2,036
December 2015	1,831
April 2016	1,863
July 2016	2,232
November 2016	1,871
March 2017	1,850
June 2017	2,254
October 2017	1,910
February 2018	1,769
May 2018	1,852
September 2018	2,063
January 2019	1,942
May 2019	1,876
August 2019	2,197
December 2019	1,989
April 2020	1,697
July 2020	2,290
November 2020	1,904
March 2021	1,769
June 2021	2,021
October 2021	1,644
February 2022	1,574
May 2022	1,602
September 2022	1,942
January 2023	1,746
April 2023	1,642
August 2023	2,148
December 2023	2,045
April 2024	1,972
July 2024	2,235
November 2024	1,799
March 2025	1,763
June 2025	2,170
October 2025	1,751
February 2026	1,791
May 2026	1,933
September 2026	1,878

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	1,901	1,818
Feb	1,844	1,791
Mar	1,801	1,790
Apr	1,796	1,881
May	1,879	1,933
Jun	2,196	2,027
Jul	2,266	2,074
Aug	2,130	1,988
Sep	2,008	1,878
Oct	1,962	1,751
Nov	1,982	1,775
Dec	1,963	1,803

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.

Water level

Monthly mean water surface elevation

882 monthly values

An elevation above a datum, not a depth of water and not a distance below the crest. Levels at different reservoirs are measured against different datums and must not be read against one another; this line is comparable only with its own history. Elevation and volume are not proportional either — a metre near the bottom of a reservoir holds far less water than a metre near the top, because the surface area grows with height.

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 882 periods, evenly spaced across the record. Every value is in the download and the API; a table of all 882 would be longer than this page and unusable with a screen reader.
Period	Canyon Ferry Lake (m)
1953.25	1,121
1953.5833333333333	1,143
1953.8333333333333	1,146
1954.1666666666667	1,145
1954.5	1,152
1954.75	1,152
1955.0833333333333	1,151
1955.4166666666667	1,155
1955.6666666666667	1,157
1956	1,155
1956.3333333333333	1,155
1956.6666666666667	1,156
1956.9166666666667	1,156
1957.25	1,153
1957.5833333333333	1,157
1957.8333333333333	1,156
1958.1666666666667	1,154
1958.5	1,158
1958.75	1,155
1959.0833333333333	1,155
1959.4166666666667	1,158
1959.6666666666667	1,157
1960	1,155
1960.3333333333333	1,157
1960.5833333333333	1,156
1960.9166666666667	1,154
1961.25	1,153
1961.5833333333333	1,152
1961.8333333333333	1,153
1962.1666666666667	1,150
1962.5	1,158
1962.75	1,157
1963.0833333333333	1,158
1963.4166666666667	1,158
1963.6666666666667	1,156
1964	1,155
1964.3333333333333	1,156
1964.5833333333333	1,158
1964.9166666666667	1,157
1965.25	1,154
1965.5	1,158
1965.8333333333333	1,155
1966.1666666666667	1,153
1966.5	1,154
1966.75	1,152
1967.0833333333333	1,150
1967.4166666666667	1,156
1967.6666666666667	1,155
1968	1,156
1968.3333333333333	1,152
1968.5833333333333	1,156
1968.9166666666667	1,156
1969.25	1,153
1969.5	1,157
1969.8333333333333	1,157
1970.1666666666667	1,154
1970.4166666666667	1,156
1970.75	1,156
1971.0833333333333	1,154
1971.3333333333333	1,151
1971.6666666666667	1,156
1972	1,155
1972.3333333333333	1,153
1972.5833333333333	1,156
1972.9166666666667	1,154
1973.25	1,153
1973.5	1,157
1973.8333333333333	1,156
1974.1666666666667	1,153
1974.4166666666667	1,156
1974.75	1,155
1975.0833333333333	1,153
1975.3333333333333	1,152
1975.6666666666667	1,157
1976	1,156
1976.25	1,153
1976.5833333333333	1,157
1976.9166666666667	1,157
1977.25	1,155
1977.5	1,157
1977.8333333333333	1,157
1978.1666666666667	1,153
1978.4166666666667	1,156
1978.75	1,156
1979.0833333333333	1,152
1979.3333333333333	1,154
1979.6666666666667	1,155
1980	1,154
1980.25	1,153
1980.5833333333333	1,156
1980.9166666666667	1,156
1981.1666666666667	1,154
1981.5	1,157
1981.8333333333333	1,156
1982.1666666666667	1,153
1982.4166666666667	1,156
1982.75	1,156
1983.0833333333333	1,155
1983.3333333333333	1,154
1983.6666666666667	1,156
1984	1,156
1984.25	1,154
1984.5833333333333	1,157
1984.9166666666667	1,154
1985.1666666666667	1,152
1985.5	1,155
1985.8333333333333	1,155
1986.0833333333333	1,153
1986.4166666666667	1,157
1986.75	1,156
1987	1,154
1987.3333333333333	1,154
1987.6666666666667	1,154
1988	1,153
1988.25	1,153
1988.5833333333333	1,154
1988.9166666666667	1,152
1989.1666666666667	1,150
1989.5	1,154
1989.8333333333333	1,153
1990.0833333333333	1,152
1990.4166666666667	1,155
1990.75	1,154
1991	1,153
1991.3333333333333	1,153
1991.6666666666667	1,154
1991.9166666666667	1,154
1992.25	1,153
1992.5833333333333	1,153
1992.9166666666667	1,154
1993.1666666666667	1,152
1993.5	1,157
1993.8333333333333	1,156
1994.0833333333333	1,153
1994.4166666666667	1,155
1994.75	1,153
1995	1,153
1995.3333333333333	1,153
1995.6666666666667	1,156
1995.9166666666667	1,156
1996.25	1,152
1996.5833333333333	1,156
1996.8333333333333	1,155
1997.1666666666667	1,150
1997.5	1,158
1997.75	1,156
1998.0833333333333	1,155
1998.4166666666667	1,157
1998.75	1,155
1999	1,155
1999.3333333333333	1,152
1999.6666666666667	1,155
1999.9166666666667	1,155
2000.25	1,153
2000.5833333333333	1,154
2000.8333333333333	1,153
2001.1666666666667	1,153
2001.5	1,155
2001.75	1,152
2002.0833333333333	1,153
2002.4166666666667	1,156
2002.6666666666667	1,156
2003	1,155
2003.3333333333333	1,156
2003.6666666666667	1,154
2003.9166666666667	1,154
2004.25	1,152
2004.5833333333333	1,153
2004.8333333333333	1,153
2005.1666666666667	1,152
2005.5	1,157
2005.75	1,154
2006.0833333333333	1,152
2006.4166666666667	1,156
2006.6666666666667	1,154
2007	1,154
2007.3333333333333	1,155
2007.5833333333333	1,155
2007.9166666666667	1,153
2008.25	1,153
2008.5833333333333	1,157
2008.8333333333333	1,156
2009.1666666666667	1,154
2009.5	1,158
2009.75	1,155
2010.0833333333333	1,154
2010.4166666666667	1,157
2010.6666666666667	1,156
2011	1,154
2011.3333333333333	1,152
2011.5833333333333	1,157
2011.9166666666667	1,155
2012.25	1,154
2012.5	1,157
2012.8333333333333	1,154
2013.1666666666667	1,153
2013.4166666666667	1,155
2013.75	1,153
2014.0833333333333	1,153
2014.4166666666667	1,156
2014.6666666666667	1,156
2015	1,154
2015.3333333333333	1,155
2015.5833333333333	1,155
2015.9166666666667	1,153
2016.25	1,154
2016.5	1,157
2016.8333333333333	1,154
2017.1666666666667	1,154
2017.4166666666667	1,157
2017.75	1,154
2018.0833333333333	1,153
2018.3333333333333	1,154
2018.6666666666667	1,155
2019	1,154
2019.3333333333333	1,154
2019.5833333333333	1,156
2019.9166666666667	1,155
2020.25	1,152
2020.5	1,157
2020.8333333333333	1,154
2021.1666666666667	1,153
2021.4166666666667	1,155
2021.75	1,152
2022.0833333333333	1,151
2022.3333333333333	1,152
2022.6666666666667	1,154
2023	1,153
2023.25	1,152
2023.5833333333333	1,156
2023.9166666666667	1,155
2024.25	1,155
2024.5	1,157
2024.8333333333333	1,153
2025.1666666666667	1,153
2025.4166666666667	1,156
2025.75	1,153
2026.0833333333333	1,153
2026.3333333333333	1,154
2026.6666666666667	1,154

Rate and persistence

+6.60 Mm³

Mean change per month over 12 months

14 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

Canyon Ferry Lake

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 Bureau of Reclamation — Reservoir operations and Colorado River data · US Government work — public domain
How the values came to exist	Measured
Period held	1953–2026
Completeness	99.3% 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	99% of the months between 1953 and 2026 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-usbr-295.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), Canyon Ferry Lake reservoir records, accessed 2026-10-05, hydrionis.com/reservoirs/reservoir-usbr-295/

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 Canyon Ferry Lake 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

882 monthly observations 1953–2026 Mm³

Spatially aggregatedHigh confidenceSeptember 2026

Source: USBR — Reservoir operations and Colorado River data, RISE catalogue item 13. Licence: Open.

Method: Monthly mean of the daily values published by the Bureau of Reclamation in acre-feet, converted to Mm³. Months with fewer than 20 days of record are not published rather than averaged from a partial month.

Stored as a volume and not as a share of capacity: the operator publishes what is in the reservoir but not what it holds when full, so a percentage cannot be computed without inventing the denominator.

Retrieved 1 October 2026.

Monthly mean of the daily values published by the Bureau of Reclamation in acre-feet, converted to Mm³. Months with fewer than 20 days of record are not published rather than averaged from a partial month.