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UPPER SWAN DITCH
Structure dossier · WDID 2800708 · 1 · TOMICHI CREEK · DWR record
Where this page's figures come from
Generated 2026-08-27 19:17 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 in line
Priority 1925-06-01 — 769th most senior of the 1505 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: LOWER SWAN DITCH (1925-06-01). Immediately behind: WERNER DITCH (1927-11-04).
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 |
|---|---|---|---|---|---|---|---|
| 35168.27545 | 1925-06-01 | 1956-04-16 | 7.0 | 0.0 | C | IRR | 347 |
Recorded use (last 15 years on record)
In a median year this structure has a recorded diversion of 195 AF. Its most recent year on record, 2025, came in at 420 AF — 215% of that, and 13th 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 | 526 | 14th lowest of 15 · 270% of median | 140 | 3.9 |
| 2012 | 2 | 1st lowest of 15 · 1% of median | 45 | 0.0 |
| 2013 | 387 | 11th lowest of 15 · 198% of median | 75 | 3.1 |
| 2014 | 158 | 6th lowest of 15 · 81% of median | 44 | 2.1 |
| 2015 | 121 | 3rd lowest of 15 · 62% of median | 67 | 1.6 |
| 2016 | 195 | 8th lowest of 15 · 100% of median | 134 | 2.5 |
| 2017 | 133 | 4th lowest of 15 · 68% of median | 71 | 1.9 |
| 2018 | 163 | 7th lowest of 15 · 84% of median | 39 | 2.7 |
| 2019 | 102 | 2nd lowest of 15 · 52% of median | 44 | 1.5 |
| 2020 | 767 | 15th lowest of 15 · 393% of median | 108 | 4.4 |
| 2021 | 143 | 5th lowest of 15 · 73% of median | 80 | 1.0 |
| 2022 | 418 | 12th lowest of 15 · 214% of median | 68 | 3.4 |
| 2023 | 308 | 10th lowest of 15 · 158% of median | 69 | 3.3 |
| 2024 | 297 | 9th lowest of 15 · 152% of median | 41 | 4.8 |
| 2025 | 420 | 13th lowest of 15 · 215% of median | 86 | 3.4 |
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.