HydrionisGlobal Water Intelligence
Monitored reservoir

Stanley Draper Lake Near Oklahoma City, OK

United States Geological Survey reservoir gauge 07229445 in OK, with published storage from 1999.

Storage record07229445

Storage now, against this reservoir's own record

103.69 Mm³
Stored, September 2026
54th
Percentile among 27 Seps on record
+7.6%
Against the Sep 1991–2020 average
-12.6%
Change over the 12 months to 2026-09

Storage in September 2026 was around the middle of the Sep record, ranked against 27 other Seps held for this reservoir.

Storage, 1999–2026

Monthly mean storage
324 monthly values, 1999 to 2026
Monthly mean storageMonthly mean storage: Stanley Draper Lake Near Oklahoma City, OK in Mm³, from 1999.75 to 2026.6666666666667.050100150Mm³1999.752003.16666666666672006.583333333333320102013.41666666666672016.83333333333332020.252023.6666666666667Year

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 324 periods, evenly spaced across the record. Every value is in the download and the API; a table of all 324 would be longer than this page and unusable with a screen reader.
PeriodStanley Draper Lake Near Oklahoma City, OK (Mm³)
October 1999111
November 1999109
January 2000108
February 2000109
March 2000110
May 2000111
June 2000110
July 2000110
September 2000102
October 2000100
December 2000103
January 2001104
February 2001107
April 2001105
May 2001106
June 2001107
August 200199.5
September 200198.4
October 200198.2
December 200196.8
January 200298.1
February 2002101
April 2002107
May 2002108
June 2002109
August 2002105
September 2002103
October 2002102
December 2002106
January 2003109
March 2003113
April 2003112
May 2003109
July 2003106
August 2003103
September 2003102
November 2003102
December 2003104
January 2004107
March 2004109
April 2004111
May 2004112
July 2004109
August 2004109
September 2004108
November 2004109
December 2004112
February 2005114
March 2005115
April 2005114
June 2005112
July 2005109
August 2005107
October 2005107
November 2005107
December 2005107
February 2006110
March 2006111
April 2006110
June 2006107
July 2006106
August 2006101
October 200697.4
November 200696.7
December 200697.7
February 200797.7
March 200797.4
May 2007103
June 2007107
July 2007113
September 2007109
October 2007108
November 2007106
January 2008107
February 2008107
March 2008108
May 2008113
June 2008114
July 2008113
September 2008110
October 2008107
November 2008107
January 2009109
February 2009109
April 2009111
May 2009110
June 2009106
August 200993.1
September 200989.2
October 200988.2
December 200992.6
January 201091.9
February 201088.3
April 201082.6
May 201079.1
June 201075.0
August 201069.5
September 201067.0
October 201066.4
December 201058.0
January 201154.2
February 201150.1
April 201149.2
May 201149.1
July 201146.2
August 201141.1
September 201138.1
November 201141.3
December 201145.2
January 201249.8
March 201254.0
April 201258.3
May 201260.1
July 201261.1
August 201258.4
September 201258.0
November 201260.4
December 201263.0
January 201366.3
March 201373.5
April 201377.7
June 201385.1
July 201386.5
August 201389.8
October 201394.5
November 201398.5
December 2013102
February 2014106
March 2014109
April 2014112
June 2014112
July 2014111
August 2014109
October 2014105
November 2014105
December 2014108
February 2015113
March 2015115
May 2015126
June 2015125
July 2015118
September 2015101
October 201595.2
November 201591.0
January 201685.6
February 201681.9
March 201678.5
May 201687.1
June 201691.2
July 201691.4
September 201689.4
October 201689.4
November 201686.7
January 201794.2
February 201799.0
March 2017103
May 2017110
June 2017111
August 2017103
September 2017100
October 201798.6
December 2017103
January 2018106
February 2018107
April 2018114
May 2018115
June 2018117
August 2018114
September 2018113
October 2018112
December 2018114
January 2019119
February 2019121
April 2019122
May 2019123
July 2019118
August 2019117
September 2019117
November 2019118
December 2019118
January 2020118
March 2020122
April 2020121
May 2020119
July 2020118
August 2020116
September 2020116
November 2020116
December 2020118
January 2021121
March 2021117
April 2021117
May 2021120
July 2021126
August 2021122
October 2021115
November 2021113
December 2021110
February 2022101
March 2022100
April 202296.1
June 202298.0
July 202295.4
August 202292.6
October 202290.0
November 202290.7
December 202292.9
February 202398.5
March 2023102
April 2023104
June 2023108
July 2023110
September 2023106
October 2023105
November 2023105
January 2024109
February 2024111
March 2024113
May 2024114
June 2024113
July 2024112
September 2024109
October 2024108
November 2024109
January 2025112
February 2025113
March 2025114
May 2025122
June 2025124
July 2025123
September 2025119
October 2025117
December 2025117
January 2026118
February 2026119
April 2026113
May 2026112
June 2026112
August 2026107
September 2026104

The reservoir's year

Seasonal storage profile
Each calendar month's reference average, against the most recent year
Seasonal storage profileSeasonal storage profile: 1991–2020 average, Most recent 12 months in Mm³, from 1 to 12.050100Mm³123456789101112Month1991–2020 average 1: 98.2 Mm³1991–2020 average 2: 99.1 Mm³1991–2020 average 3: 100 Mm³1991–2020 average 4: 102 Mm³1991–2020 average 5: 103 Mm³1991–2020 average 6: 103 Mm³1991–2020 average 7: 101 Mm³1991–2020 average 8: 98.3 Mm³1991–2020 average 9: 96.4 Mm³1991–2020 average 10: 96.2 Mm³1991–2020 average 11: 96.5 Mm³1991–2020 average 12: 97.5 Mm³Most recent 12 months 1: 118 Mm³Most recent 12 months 2: 119 Mm³Most recent 12 months 3: 118 Mm³Most recent 12 months 4: 113 Mm³Most recent 12 months 5: 112 Mm³Most recent 12 months 6: 112 Mm³Most recent 12 months 7: 111 Mm³Most recent 12 months 8: 107 Mm³Most recent 12 months 9: 104 Mm³Most recent 12 months 10: 117 Mm³Most recent 12 months 11: 117 Mm³Most recent 12 months 12: 117 Mm³
  • 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
Period1991–2020 average (Mm³)Most recent 12 months (Mm³)
Jan98.2118
Feb99.1119
Mar100118
Apr102113
May103112
Jun103112
Jul101111
Aug98.3107
Sep96.4104
Oct96.2117
Nov96.5117
Dec97.5117

Why this page shows a volume and not a percentage

Rate and persistence

-1.25 Mm³
Mean drawdown 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

Stanley Draper Lake Near Oklahoma City, OK
Gauge location
Stanley Draper Lake Near Oklahoma City, OKStanley Draper Lake Near Oklahoma City, OK — 103.69 Mm³Stanley Draper Lake Near Oklahoma City, OK — 103.69 Mm³

About this data

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 existMeasured
Period held1999–2026
Completeness96.4% 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.
Continuity96% of the months between 1999 and 2026 are held. Monthly means of the publisher's own daily record.
Last read from the publisher2026-10-01
RedistributionPermitted by the upstream licences
Commercial reusePermitted by the upstream licences. No Hydrionis access tier can widen this.
MethodologyHow this was produced

Use this data

Use this data

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), Stanley Draper Lake Near Oklahoma City, OK reservoir records, accessed 2026-10-05, hydrionis.com/reservoirs/reservoir-usgs-07229445/

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 Stanley Draper Lake Near Oklahoma City, OK 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

324 monthly observations 1999–2026 Mm³
Spatially aggregatedHigh confidenceSeptember 2026

Source: USGS — National Water Information System, 07229445. 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.

Hydrionis would like to measure which pages are read, using HEKNO Analytics, which HEKNO Ltd runs itself, and Google Analytics. Google Analytics stores an identifier on your device, so we only do this if you agree. Nothing is measured if you decline, and the site works identically either way. See cookies for what is set and how to change your mind.