Hords Ck Lk, TX — storage

Storage now, against this reservoir's own record

3.22 Mm³

Stored, November 2002

9th

Percentile among 54 Novs on record

-19.8%

Change over the 12 months to 2002-11

Storage in November 2002 was lower than almost every other Nov on record, ranked against 54 other Novs held for this reservoir.

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

Storage, 1948–2002

Monthly mean storage

643 monthly values, 1948 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 643 periods, evenly spaced across the record. Every value is in the download and the API; a table of all 643 would be longer than this page and unusable with a screen reader.
Period	Hords Ck Lk Nr Valera, TX (Mm³)
April 1948	0.060
July 1948	0.775
September 1948	1.60
December 1948	1.56
March 1949	1.65
May 1949	4.30
August 1949	4.81
November 1949	4.72
January 1950	4.53
April 1950	4.14
July 1950	3.76
October 1950	3.58
December 1950	3.17
March 1951	2.87
June 1951	8.04
August 1951	7.68
November 1951	6.92
February 1952	6.43
April 1952	6.11
July 1952	5.59
October 1952	5.29
December 1952	5.02
March 1953	4.90
June 1953	4.35
August 1953	7.31
November 1953	6.84
February 1954	6.41
May 1954	8.66
July 1954	8.63
October 1954	7.15
January 1955	6.68
March 1955	6.45
June 1955	7.74
September 1955	7.53
November 1955	7.32
February 1956	6.93
May 1956	10.9
July 1956	9.36
October 1956	7.85
January 1957	7.49
March 1957	7.29
June 1957	10.7
September 1957	9.08
December 1957	8.71
February 1958	8.58
May 1958	8.59
August 1958	8.44
October 1958	8.28
January 1959	7.78
April 1959	7.23
June 1959	7.42
September 1959	7.54
December 1959	7.99
February 1960	8.75
May 1960	8.13
August 1960	7.12
October 1960	6.59
January 1961	6.48
April 1961	6.22
June 1961	7.20
September 1961	7.06
December 1961	6.73
March 1962	6.17
May 1962	5.78
August 1962	5.12
November 1962	4.86
January 1963	4.61
April 1963	4.10
July 1963	5.52
September 1963	4.87
December 1963	4.37
March 1964	4.20
May 1964	4.87
August 1964	3.85
November 1964	4.75
January 1965	4.64
April 1965	4.43
July 1965	10.1
October 1965	8.91
December 1965	8.64
March 1966	8.18
June 1966	8.45
August 1966	8.01
November 1966	8.26
February 1967	7.57
April 1967	7.14
July 1967	6.21
October 1967	5.66
December 1967	5.45
March 1968	8.65
June 1968	10.8
August 1968	9.77
November 1968	8.75
February 1969	8.31
May 1969	10.5
July 1969	10.1
October 1969	9.52
January 1970	10.00
March 1970	10.7
June 1970	10.9
September 1970	9.11
November 1970	8.72
February 1971	8.02
May 1971	7.52
July 1971	6.83
October 1971	11.0
January 1972	10.6
March 1972	10.3
June 1972	9.55
September 1972	8.43
November 1972	8.08
February 1973	7.69
May 1973	8.90
August 1973	8.49
October 1973	9.22
January 1974	8.96
April 1974	8.15
June 1974	7.51
September 1974	7.36
December 1974	10.1
February 1975	10.1
May 1975	10.0
August 1975	8.90
October 1975	8.04
January 1976	7.48
April 1976	6.81
June 1976	6.28
September 1976	6.14
December 1976	5.72
March 1977	5.34
May 1977	6.27
August 1977	5.26
November 1977	4.47
January 1978	4.10
April 1978	3.75
July 1978	3.03
September 1978	4.06
December 1978	3.61
March 1979	3.38
May 1979	4.18
August 1979	3.86
November 1979	3.19
January 1980	3.11
April 1980	2.88
July 1980	3.35
September 1980	3.12
December 1980	3.91
March 1981	4.61
June 1981	4.48
August 1981	3.88
November 1981	3.66
February 1982	3.25
April 1982	2.98
July 1982	5.57
October 1982	4.66
December 1982	4.44
March 1983	4.33
June 1983	3.94
August 1983	3.50
November 1983	2.99
February 1984	2.73
April 1984	2.55
July 1984	2.05
October 1984	1.81
January 1985	2.39
March 1985	2.42
June 1985	2.25
September 1985	2.09
November 1985	2.80
February 1986	2.66
May 1986	2.54
July 1986	3.91
October 1986	4.02
January 1987	4.19
March 1987	4.90
June 1987	8.76
September 1987	8.25
November 1987	7.71
February 1988	7.36
May 1988	6.73
August 1988	6.08
October 1988	5.53
January 1989	5.09
April 1989	4.93
June 1989	4.90
September 1989	4.29
December 1989	3.94
February 1990	3.85
May 1990	5.70
August 1990	5.20
October 1990	4.98
January 1991	4.77
April 1991	4.50
June 1991	4.43
September 1991	4.40
December 1991	8.04
February 1992	11.3
May 1992	9.97
August 1992	9.75
November 1993	6.32
January 1994	6.06
April 1994	5.79
July 1994	9.29
September 1994	8.52
December 1994	8.15
March 1995	7.87
May 1995	7.85
August 1995	8.89
November 1995	8.08
January 1996	7.72
April 1996	7.12
July 1996	7.37
September 1996	7.87
December 1996	8.18
March 1997	9.17
June 1997	11.1
August 1997	9.65
November 1997	8.47
February 1998	8.02
April 1998	7.95
July 1998	7.99
October 1998	6.70
December 1998	6.43
March 1999	5.92
June 1999	5.74
August 1999	5.23
November 1999	4.51
February 2000	3.90
April 2000	3.65
July 2000	5.09
November 2000	5.18
February 2001	5.08
April 2001	5.53
July 2001	4.83
October 2001	4.11
December 2001	3.95
March 2002	3.65
June 2002	3.28
August 2002	3.30
November 2002	3.22

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

-0.07 Mm³

Mean drawdown per month over 12 months

13 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

Hords Ck Lk Nr Valera, 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	1948–2002
Completeness	97.4% 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.
Continuity	97% of the months between 1948 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-08141000.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), Hords Ck Lk Nr Valera, TX reservoir records, accessed 2026-10-05, hydrionis.com/reservoirs/reservoir-usgs-08141000/

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 Hords Ck Lk Nr Valera, 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

643 monthly observations 1948–2002 Mm³

Spatially aggregatedHigh confidenceNovember 2002

Source: USGS — National Water Information System, 08141000. 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.