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PIONEER DITCH
Structure dossier · WDID 5900720 · 1 · OHIO CREEK · DWR record
Where this page's figures come from
Generated 2026-08-28 00:39 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 1878-06-01 — 19th most senior of the 2360 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: SUN CREEK DITCH (1878-06-01). Immediately behind: GUNNISON AND TOMICHI VALLEY DITCH ASSOCI (1879-02-06).
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 |
|---|---|---|---|---|---|---|---|
| 10379.0 | 1878-06-01 | 1906-09-14 | 2.625 | 0.0 | C | IRRAUG | 10 |
| 30667.10379 | 1878-06-01 | 1941-04-29 | 6.675 | 0.0 | C | IRR | 282 |
Legal record & documents
4 decreed actions on record across
3 court cases:
CA2021, CA1325, 85CW0040.
Every case, dated
| Case | Actions | Latest adjudication | Types |
|---|---|---|---|
CA2021 | 1 | 1941-04-29 | S |
CA1325 | 1 | 1906-09-14 | O |
85CW0040 | 2 | 1906-09-14 | O |
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 271 AF. Its most recent year on record, 2025, came in at 331 AF — 122% of that, and 9th lowest of the 15 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) |
|---|---|---|---|---|---|
| 2011 | 213 | 5th lowest of 15 · 79% of median | — | 36 | 3.7 |
| 2012 | 232 | 6th lowest of 15 · 86% of median | — | 58 | 4.0 |
| 2013 | 375 | 11th lowest of 15 · 138% of median | — | 105 | 2.4 |
| 2014 | 444 | 13th lowest of 15 · 164% of median | — | 69 | 5.3 |
| 2015 | 175 | 2nd lowest of 15 · 65% of median | — | 77 | 1.8 |
| 2016 | 271 | 8th lowest of 15 · 100% of median | — | 114 | 2.4 |
| 2017 | 363 | 10th lowest of 15 · 134% of median | — | 61 | 6.4 |
| 2018 | 207 | 4th lowest of 15 · 76% of median | — | 38 | 3.2 |
| 2019 | 171 | 1st lowest of 15 · 63% of median | 0 | 33 | 3.1 |
| 2020 | 378 | 12th lowest of 15 · 140% of median | 0 | 86 | 4.7 |
| 2021 | 798 | 14th lowest of 15 · 294% of median | 304 | 124 | 8.5 |
| 2022 | 1,376 | 15th lowest of 15 · 508% of median | 688 | 66 | 13.7 |
| 2023 | 264 | 7th lowest of 15 · 97% of median | 0 | 47 | 3.2 |
| 2024 | 187 | 3rd lowest of 15 · 69% of median | — | 33 | 3.4 |
| 2025 | 331 | 9th lowest of 15 · 122% of median | 0 | 94 | 4.5 |
Trends for this structure
Recorded use shows no clear trend over its last 15 recorded years — which is itself worth knowing.
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 | 2 right(s), seniority decoded |
| diversion record | present | 3164 measured days; currency unknown (no data-coverage date to compare against) |
| record continuity | sparse | 32% of the irrigation seasons in 1979-2025 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.