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

108.04 Mm³
Stored, August 2026
54th
Percentile among 27 Augs on record
+9.9%
Against the Aug 1991–2020 average
-9.9%
Change over the 12 months to 2026-08

Storage in August 2026 was around the middle of the Aug record, ranked against 27 other Augs held for this reservoir.

Storage, 1999–2026

Monthly mean storage
323 monthly values, 1999 to 2026
Monthly mean storageMonthly mean storage: Stanley Draper Lake Near Oklahoma City, OK in Mm³, from 1999.75 to 2026.5833333333333.050100150Mm³1999.752003.16666666666672006.583333333333320102013.41666666666672016.83333333333332020.252023.6666666666667Year

Monthly means of the publisher's daily record. Volume, not percentage of capacity: without a capacity whose definition is stated, fullness cannot be computed.

View the data behind this chart
Underlying data
PeriodStanley Draper Lake Near Oklahoma City, OK (Mm³)
October 1999111
November 1999109
December 1999108
January 2000108
February 2000109
March 2000110
April 2000110
May 2000111
June 2000110
July 2000110
August 2000107
September 2000102
October 2000100
November 2000103
December 2000103
January 2001104
February 2001107
March 2001106
April 2001105
May 2001106
June 2001107
July 2001104
August 200199.5
September 200198.4
October 200198.2
November 200196.6
December 200196.8
January 200298.1
February 2002101
March 2002103
April 2002107
May 2002108
June 2002109
July 2002108
August 2002105
September 2002103
October 2002102
November 2002104
December 2002106
January 2003109
February 2003112
March 2003113
April 2003112
May 2003109
June 2003109
July 2003106
August 2003103
September 2003102
October 2003101
November 2003102
December 2003104
January 2004107
February 2004107
March 2004109
April 2004111
May 2004112
June 2004110
July 2004109
August 2004109
September 2004108
October 2004107
November 2004109
December 2004112
January 2005114
February 2005114
March 2005115
April 2005114
May 2005113
June 2005112
July 2005109
August 2005107
September 2005107
October 2005107
November 2005107
December 2005107
January 2006109
February 2006110
March 2006111
April 2006110
May 2006109
June 2006107
July 2006106
August 2006101
September 200699.2
October 200697.4
November 200696.7
December 200697.7
January 200798.2
February 200797.7
March 200797.4
April 200799.2
May 2007103
June 2007107
July 2007113
August 2007111
September 2007109
October 2007108
November 2007106
December 2007106
January 2008107
February 2008107
March 2008108
April 2008111
May 2008113
June 2008114
July 2008113
August 2008112
September 2008110
October 2008107
November 2008107
December 2008108
January 2009109
February 2009109
March 2009110
April 2009111
May 2009110
June 2009106
July 200998.2
August 200993.1
September 200989.2
October 200988.2
November 200990.8
December 200992.6
January 201091.9
February 201088.3
March 201085.5
April 201082.6
May 201079.1
June 201075.0
July 201073.9
August 201069.5
September 201067.0
October 201066.4
November 201061.8
December 201058.0
January 201154.2
February 201150.1
March 201148.8
April 201149.2
May 201149.1
June 201150.7
July 201146.2
August 201141.1
September 201138.1
October 201138.8
November 201141.3
December 201145.2
January 201249.8
February 201251.9
March 201254.0
April 201258.3
May 201260.1
June 201261.8
July 201261.1
August 201258.4
September 201258.0
October 201258.8
November 201260.4
December 201263.0
January 201366.3
February 201369.7
March 201373.5
April 201377.7
May 201380.6
June 201385.1
July 201386.5
August 201389.8
September 201391.3
October 201394.5
November 201398.5
December 2013102
January 2014104
February 2014106
March 2014109
April 2014112
May 2014112
June 2014112
July 2014111
August 2014109
September 2014106
October 2014105
November 2014105
December 2014108
January 2015110
February 2015113
March 2015115
April 2015119
May 2015126
June 2015125
July 2015118
August 2015109
September 2015101
October 201595.2
November 201591.0
December 201588.0
January 201685.6
February 201681.9
March 201678.5
April 201681.2
May 201687.1
June 201691.2
July 201691.4
August 201689.5
September 201689.4
October 201689.4
November 201686.7
December 201689.3
January 201794.2
February 201799.0
March 2017103
April 2017108
May 2017110
June 2017111
July 2017107
August 2017103
September 2017100
October 201798.6
November 201799.3
December 2017103
January 2018106
February 2018107
March 2018111
April 2018114
May 2018115
June 2018117
July 2018116
August 2018114
September 2018113
October 2018112
November 2018113
December 2018114
January 2019119
February 2019121
March 2019123
April 2019122
May 2019123
June 2019123
July 2019118
August 2019117
September 2019117
October 2019116
November 2019118
December 2019118
January 2020118
February 2020120
March 2020122
April 2020121
May 2020119
June 2020119
July 2020118
August 2020116
September 2020116
October 2020115
November 2020116
December 2020118
January 2021121
February 2021120
March 2021117
April 2021117
May 2021120
June 2021123
July 2021126
August 2021122
September 2021118
October 2021115
November 2021113
December 2021110
January 2022102
February 2022101
March 2022100
April 202296.1
May 202297.5
June 202298.0
July 202295.4
August 202292.6
September 202291.4
October 202290.0
November 202290.7
December 202292.9
January 202395.4
February 202398.5
March 2023102
April 2023104
May 2023106
June 2023108
July 2023110
August 2023109
September 2023106
October 2023105
November 2023105
December 2023107
January 2024109
February 2024111
March 2024113
April 2024114
May 2024114
June 2024113
July 2024112
August 2024110
September 2024109
October 2024108
November 2024109
December 2024110
January 2025112
February 2025113
March 2025114
April 2025116
May 2025122
June 2025124
July 2025123
August 2025120
September 2025119
October 2025117
November 2025117
December 2025117
January 2026118
February 2026119
March 2026118
April 2026113
May 2026112
June 2026112
July 2026111
August 2026108

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: 108 Mm³Most recent 12 months 9: 119 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
Aug98.3108
Sep96.4119
Oct96.2117
Nov96.5117
Dec97.5117

Rate and persistence

-0.99 Mm³
Mean drawdown per month over 12 months
0 of 24
Months in the last two years 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 — 108.04 Mm³Stanley Draper Lake Near Oklahoma City, OK — 108.04 Mm³

Where this comes from

323 monthly observations 1999–2026 Mm³
Spatially aggregatedHigh confidenceAugust 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 25 August 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 Google Analytics. It stores an identifier on your device, so we only do it if you agree. Nothing is stored if you decline, and the site works identically either way. See cookies for what is set and how to change your mind.