B. A. Steinhagen Lk, TX — storage

Storage now, against this reservoir's own record

64.40 Mm³

Stored, February 2002

10th

Percentile among 51 Febs on record

-27.6%

Change over the 12 months to 2002-02

Storage in February 2002 was lower than most Febs on record, ranked against 51 other Febs held for this reservoir.

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

Storage, 1951–2002

Monthly mean storage

607 monthly values, 1951 to 2002

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 607 periods, evenly spaced across the record. Every value is in the download and the API; a table of all 607 would be longer than this page and unusable with a screen reader.
Period	B. A. Steinhagen Lk At Town Bluff, TX (Mm³)
May 1951	86.5
August 1951	0.067
October 1951	5.95
January 1952	14.4
March 1952	75.1
June 1952	90.8
August 1952	28.7
November 1952	3.92
January 1953	7.96
April 1953	17.5
June 1953	110
September 1953	44.9
November 1953	27.3
February 1954	107
April 1954	119
July 1954	47.9
October 1954	1.80
December 1954	108
March 1955	110
May 1955	115
August 1955	88.2
October 1955	43.9
January 1956	45.4
March 1956	113
June 1956	103
August 1956	15.0
November 1956	6.46
January 1957	46.8
April 1957	111
July 1957	114
September 1957	103
December 1957	108
February 1958	104
May 1958	108
July 1958	111
October 1958	105
December 1958	98.6
March 1959	107
May 1959	105
August 1959	102
October 1959	90.9
January 1960	96.0
March 1960	115
June 1960	75.1
September 1960	115
November 1960	67.4
February 1961	96.7
April 1961	98.7
July 1961	113
September 1961	88.2
December 1961	110
February 1962	107
May 1962	114
July 1962	111
October 1962	112
December 1962	104
March 1963	113
June 1963	108
August 1963	73.2
November 1963	52.9
January 1964	101
April 1964	117
June 1964	109
September 1964	30.7
November 1964	38.8
February 1965	97.3
April 1965	108
July 1965	48.8
September 1965	15.7
December 1965	89.1
February 1966	111
May 1966	105
August 1966	100
October 1966	107
January 1967	106
March 1967	96.5
June 1967	99.8
August 1967	91.6
November 1967	88.0
January 1968	109
April 1968	102
June 1968	106
September 1968	93.2
November 1968	108
February 1969	98.8
May 1969	107
July 1969	103
October 1969	37.7
December 1969	99.6
March 1970	101
May 1970	106
August 1970	79.3
October 1970	90.6
January 1971	102
March 1971	62.6
June 1971	85.2
August 1971	58.9
November 1971	88.7
January 1972	110
April 1972	96.4
July 1972	85.8
September 1972	93.4
December 1972	109
February 1973	111
May 1973	103
July 1973	105
October 1973	107
December 1973	92.7
March 1974	47.0
May 1974	93.3
August 1974	109
October 1974	87.1
January 1975	100.0
April 1975	103
June 1975	103
September 1975	67.8
November 1975	83.3
February 1976	92.5
April 1976	91.2
July 1976	96.6
September 1976	103
December 1976	88.4
February 1977	83.4
May 1977	98.6
July 1977	76.1
October 1977	89.9
December 1977	105
March 1978	80.0
June 1978	96.7
August 1978	99.6
November 1978	102
January 1979	77.6
April 1979	100
June 1979	103
September 1979	97.2
November 1979	95.9
February 1980	97.9
April 1980	99.1
July 1980	98.6
September 1980	109
December 1980	80.8
March 1981	91.8
May 1981	104
August 1981	89.9
October 1981	88.4
January 1982	80.9
March 1982	106
June 1982	88.6
August 1982	87.1
November 1982	99.8
January 1983	89.7
April 1983	102
June 1983	105
September 1983	106
November 1983	98.1
February 1984	102
May 1984	100
July 1984	113
October 1984	101
December 1984	98.0
March 1985	99.3
May 1985	105
August 1985	102
October 1985	103
January 1986	103
March 1986	103
June 1986	103
August 1986	109
February 1987	109
May 1987	99.8
July 1987	99.3
October 1987	95.4
December 1987	107
March 1988	106
May 1988	104
August 1988	108
October 1988	101
January 1989	104
March 1989	104
June 1989	104
August 1989	103
November 1989	101
January 1990	110
April 1990	101
July 1990	101
September 1990	101
December 1990	103
February 1991	104
May 1991	102
July 1991	101
October 1991	105
December 1991	107
March 1992	104
May 1992	102
August 1992	100
October 1992	101
January 1993	98.6
April 1993	99.3
June 1993	104
September 1993	104
November 1993	97.8
February 1994	59.5
April 1994	105
July 1994	107
September 1994	100
December 1994	106
February 1995	96.2
May 1995	102
July 1995	108
October 1995	102
December 1995	102
March 1996	45.4
June 1996	98.7
August 1996	107
November 1996	111
January 1997	108
April 1997	105
June 1997	104
September 1997	103
November 1997	105
February 1998	97.1
April 1998	99.7
July 1998	100
September 1998	109
December 1998	106
March 1999	79.9
May 1999	109
August 1999	106
October 1999	107
January 2000	47.6
March 2000	55.3
June 2000	103
August 2000	112
November 2000	103
January 2001	93.0
April 2001	94.5
June 2001	97.4
September 2001	70.4
November 2001	39.7
February 2002	64.4

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

-2.04 Mm³

Mean drawdown per month over 12 months

9 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

B. A. Steinhagen Lk At Town Bluff, TX

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	1951–2002
Completeness	97.3% 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	97% of the months between 1951 and 2002 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-08040000.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), B. A. Steinhagen Lk At Town Bluff, TX reservoir records, accessed 2026-10-05, hydrionis.com/reservoirs/reservoir-usgs-08040000/

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 B. A. Steinhagen Lk At Town Bluff, TX 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

607 monthly observations 1951–2002 Mm³

Spatially aggregatedHigh confidenceFebruary 2002

Source: USGS — National Water Information System, 08040000. 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.