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COOPER DITCH
Structure dossier · WDID 6200568 · 1 · GUNNISON RIVER · DWR record
Where this page's figures come from
Generated 2026-08-27 21:16 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 1891-05-01 — 61st most senior of the 1980 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: CIMARRON FEEDER GARNET DITCH (1890-08-01). Immediately behind: DRY POWDERHORN DITCH (1891-05-01).
Decreed rights (3)
| 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 |
|---|---|---|---|---|---|---|---|
| 15096.0 | 1891-05-01 | 1904-03-28 | 2.61 | 0.0 | C | IRR | 66 |
| 27585.15096 | 1891-05-01 | 1941-04-21 | 7.39 | 0.0 | C | IRR | 208 |
| 27585.19811 | 1904-03-29 | 1941-04-21 | 1.0 | 0.0 | C | IRR | 249 |
Recorded use (last 15 years on record)
In a median year this structure has a recorded diversion of 3,019 AF. Its most recent year on record, 1992, came in at 6,129 AF — 203% of that, and 14th lowest of the 15 years with a recorded volume.
| 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 | Days recorded | Peak (cfs) |
|---|---|---|---|---|
| 1978 | 3,019 | 8th lowest of 15 · 100% of median | 125 | 25.0 |
| 1979 | 2,727 | 6th lowest of 15 · 90% of median | 129 | 20.0 |
| 1980 | 1,198 | 1st lowest of 15 · 40% of median | 66 | 15.0 |
| 1981 | 2,541 | 4th lowest of 15 · 84% of median | 92 | 18.0 |
| 1982 | 2,243 | 3rd lowest of 15 · 74% of median | 85 | 18.0 |
| 1983 | 2,967 | 7th lowest of 15 · 98% of median | 98 | 24.0 |
| 1984 | 4,094 | 10th lowest of 15 · 136% of median | 166 | 20.0 |
| 1985 | 2,624 | 5th lowest of 15 · 87% of median | 153 | 20.0 |
| 1986 | 5,465 | 12th lowest of 15 · 181% of median | 174 | 30.0 |
| 1987 | 4,542 | 11th lowest of 15 · 150% of median | 186 | 20.0 |
| 1988 | 1,646 | 2nd lowest of 15 · 54% of median | 124 | 10.0 |
| 1989 | 5,534 | 13th lowest of 15 · 183% of median | 148 | 30.0 |
| 1990 | 3,104 | 9th lowest of 15 · 103% of median | 122 | 20.0 |
| 1991 | 6,222 | 15th lowest of 15 · 206% of median | 176 | 30.0 |
| 1992 | 6,129 | 14th lowest of 15 · 203% of median | 183 | 20.0 |
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.