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AULT RESERVOIR
Structure dossier · WDID 4003412 · 3 · AULT CREEK · DWR record
Where this page's figures come from
Generated 2026-08-28 00:41 by Hydrohistorian. Sources: DWR HydroBase snapshot HydroBase_CO_20260707 (history) + CDSS REST (current), USGS NWIS cross-checks. Engine v0.5.0 (2deb1d7) — every figure regenerates from this named code version and data image.
Where it sits
Location as DWR records it. Faint dots are the neighbouring water; click any to open it.
Which of its rights are out of priority?
Not computable for this structure: this structure is not on the modelled flow network, so no reference gage can honestly stand in for it.
Where it sits in line
Priority 1955-08-15 — 1984th most senior of the 4661 structures with decreed rights in this water districtDWR's administrative subdivision of a river basin; the unit calls are usually stated in..
Under prior appropriationColorado's rule for sharing water: first in time, first in right. Age decides, not proximity or need., everything ahead of it in this line is satisfied in full before it receives any water. Immediately ahead: AULT DITCH (1955-08-03). Immediately behind: PAULSON RESERVOIR (1955-12-10).
Decreed rights (1)
| Admin noDWR's numeric encoding of a water right's seniority. Smaller is more senior; the integer part counts days from 1849-12-31 to the date that ranks the right. | AppropriatedWhen water was first put to beneficial use. It sets seniority unless a prior adjudication date is later. | AdjudicatedWhen the water court confirmed the right. A use decreed in 1975 was not a decreed use in 1955, however old the appropriation is. | AbsoluteA right actually put to use, as opposed to conditional -- a placeholder for a use not yet made. | ConditionalA right reserving a place in line for a use not yet made; it must be diligently pursued or it lapses. | Units | UsesWhat the court said this water may be used for -- irrigation, municipal supply, augmentation and so on. | Case |
|---|---|---|---|---|---|---|---|
| 38577.0 | 1955-08-15 | 1964-01-31 | 116.0 | 0.0 | A | IRR | K130 |
Legal record & documents
2 decreed actions on record across
2 court cases:
CA4808, 79CW0201.
Every case, dated
| Case | Actions | Latest adjudication | Types |
|---|---|---|---|
CA4808 | 1 | 1964-01-31 | S |
79CW0201 | 1 | 1964-01-31 | S |
DWR's own records for this structure: net amounts · transactions & adjudication history · scanned decrees (search a case number there for the imaged document). On this site: the district's full legal picture →
Recorded use (last 15 years on record)
In a median year this structure has a recorded diversion of 98 AF. Its most recent year on record, 2012, came in at 0 AF — 0% of that, and 1st lowest of the 14 years with a recorded volume.
This structure records both diversions and reservoir releases — they are separate water movements and are accounted separately below.
| Year | Diverted (AFA volume: one acre covered a foot deep, about 326,000 gallons -- roughly a suburban household's outdoor use for a year.) | Compared with its own record | Released (AF) | Days recorded | Peak (cfs) |
|---|---|---|---|---|---|
| 1978 | 118 | 13th lowest of 14 · 121% of median | — | 26 | 2.4 |
| 1979 | 109 | 10th lowest of 14 · 112% of median | — | 23 | 2.5 |
| 1985 | 208 | 14th lowest of 14 · 213% of median | — | 31 | 3.5 |
| 1986 | 96 | 7th lowest of 14 · 98% of median | — | 32 | 1.7 |
| 1987 | 113 | 11th lowest of 14 · 116% of median | — | 20 | 3.0 |
| 1988 | 99 | 8th lowest of 14 · 102% of median | — | 26 | 2.0 |
| 1989 | 82 | 6th lowest of 14 · 84% of median | — | 27 | 2.0 |
| 1990 | 6 | 4th lowest of 14 · 6% of median | — | 3 | 1.5 |
| 1991 | 115 | 12th lowest of 14 · 118% of median | — | 23 | 3.2 |
| 1992 | 0 | 1st lowest of 14 · 0% of median | — | 1 | 0.0 |
| 1993 | 58 | 5th lowest of 14 · 60% of median | — | 27 | 1.5 |
| 1994 | 102 | 9th lowest of 14 · 105% of median | — | 43 | 1.2 |
| 1995 | 0 | 1st lowest of 14 · 0% of median | — | 1 | 0.0 |
| 2005 | — | no recorded volume | 75 | 0 | — |
| 2012 | 0 | 1st lowest of 14 · 0% of median | — | 1 | 0.0 |
Trends for this structure
Recorded use is falling over its last 14 recorded years (-4 AF/yr, Mann-Kendall p=0.007).
How good is our record of it?
Grade B (7/10 points) — the components below are the finding; the letter alone is not.
The rubric, component by component
| Check | State | Detail |
|---|---|---|
| identity | complete | name, type, and water source all on file |
| decreed rights | on file | 1 right(s), seniority decoded |
| diversion record | present | 306 measured days; currency unknown (no data-coverage date to compare against) |
| record continuity | sparse | 4% of the irrigation seasons in 1975-2012 carry measured days |
| published-record stability | stable | no upstream revisions recorded against this structure |
Advisory reading aid on public data — not an administrative or legal conclusion, not a title opinion, and not a substitute for DWR administration or an engineer's analysis. Methodology review status is disclosed at hydrohistorian's basin pages.