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TWIN ROCK DITCH
Structure dossier · WDID 3004665 · 1 · ANIMAS RIVER · DWR record
Where this page's figures come from
Generated 2026-08-27 20:38 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 1887-11-01 — 464th 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: WEBBER DITCH (1887-08-01). Immediately behind: BODO PINE RIDGE DITCH (1899-06-01).
Decreed rights (2)
| 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 |
|---|---|---|---|---|---|---|---|
| 26974.13819 | 1887-11-01 | 1966-03-21 | 2.0 | 0.0 | C | IRR | 65-2 |
| 36751.0 | 1950-08-15 | 1966-03-21 | 0.16 | 0.0 | C | IRRSTK | 65-65 |
Recorded use (last 15 years on record)
In a median year this structure has a recorded diversion of 5,744 AF. Its most recent year on record, 2025, came in at 5,338 AF — 93% of that, and 3rd 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) |
|---|---|---|---|---|
| 2011 | 5,744 | 8th lowest of 15 · 100% of median | 205 | 19.0 |
| 2012 | 5,461 | 6th lowest of 15 · 95% of median | 210 | 17.5 |
| 2013 | 4,948 | 1st lowest of 15 · 86% of median | 207 | 18.0 |
| 2014 | 5,356 | 4th lowest of 15 · 93% of median | 166 | 19.5 |
| 2015 | 5,205 | 2nd lowest of 15 · 91% of median | 190 | 18.0 |
| 2016 | 6,286 | 12th lowest of 15 · 109% of median | 193 | 25.0 |
| 2017 | 5,443 | 5th lowest of 15 · 95% of median | 260 | 17.3 |
| 2018 | 6,814 | 15th lowest of 15 · 119% of median | 305 | 23.0 |
| 2019 | 6,515 | 14th lowest of 15 · 113% of median | 205 | 23.4 |
| 2020 | 6,311 | 13th lowest of 15 · 110% of median | 210 | 23.0 |
| 2021 | 6,209 | 11th lowest of 15 · 108% of median | 203 | 23.4 |
| 2022 | 6,192 | 10th lowest of 15 · 108% of median | 199 | 22.0 |
| 2023 | 5,461 | 6th lowest of 15 · 95% of median | 178 | 20.0 |
| 2024 | 5,837 | 9th lowest of 15 · 102% of median | 193 | 22.0 |
| 2025 | 5,338 | 3rd lowest of 15 · 93% of median | 179 | 21.0 |
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.