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ERWIN DITCH
Structure dossier · WDID 3001099 · 1 · WILSON GULCH · DWR record
Where this page's figures come from
Generated 2026-08-27 20:43 by Hydrohistorian. Sources: DWR HydroBase snapshot HydroBase_CO_20260707 (history) + CDSS REST (current), USGS NWIS cross-checks. Engine v0.5.0 (a1c9146) — every figure regenerates from this named code version and data image.
Which of its rights get called out?
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 1970-10-01 — 785th most senior of the 2277 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: STONE IRRIGATION SYSTEM AP (1969-05-20). Immediately behind: ERWIN PUMP (1970-10-01).
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 |
|---|---|---|---|---|---|---|---|
| 44194.44103 | 1970-10-01 | 1971-12-31 | 0.5 | 0.0 | C | IRRDOMSTK |
Recorded use (last 15 years on record)
In a median year this structure has a recorded diversion of 19 AF. Its most recent year on record, 2025, came in at 51 AF — 268% of that, and 15th 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) |
|---|---|---|---|---|
| 1973 | 5 | 2nd lowest of 15 · 26% of median | 32 | 0.1 |
| 1974 | 17 | 6th lowest of 15 · 90% of median | 90 | 0.1 |
| 1975 | 19 | 7th lowest of 15 · 100% of median | 96 | 0.2 |
| 1976 | 32 | 14th lowest of 15 · 168% of median | 142 | 0.2 |
| 1977 | 19 | 7th lowest of 15 · 100% of median | 89 | 0.2 |
| 1978 | 16 | 5th lowest of 15 · 84% of median | 86 | 0.1 |
| 1979 | 11 | 4th lowest of 15 · 58% of median | 62 | 0.1 |
| 1980 | 10 | 3rd lowest of 15 · 53% of median | 34 | 0.2 |
| 1981 | 25 | 12th lowest of 15 · 132% of median | 127 | 0.1 |
| 1982 | 24 | 11th lowest of 15 · 126% of median | 125 | 0.1 |
| 1983 | 22 | 9th lowest of 15 · 116% of median | 118 | 0.1 |
| 1984 | 22 | 9th lowest of 15 · 116% of median | 110 | 0.2 |
| 1985 | 0 | 1st lowest of 15 · 0% of median | 12 | 0.0 |
| 2024 | 29 | 13th lowest of 15 · 153% of median | 132 | 0.2 |
| 2025 | 51 | 15th lowest of 15 · 268% of median | 103 | 0.3 |
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.