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AQUA DITCH
Structure dossier · WDID 7000502 · 1 · ROAN CREEK · DWR record
Where this page's figures come from
Generated 2026-08-27 23:14 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.
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 1884-08-10 — 9th most senior of the 519 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: CONWELL DITCH ALT PT NO4 (1884-04-13). Immediately behind: UPPER ROAN CREEK DITCH (1884-08-10).
Decreed rights (5)
| 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 |
|---|---|---|---|---|---|---|---|
| 12641.0 | 1884-08-10 | 1889-05-11 | 0.75 | 0.0 | C | IRR | |
| 13102.0 | 1885-11-14 | 1889-05-11 | 0.3 | 0.0 | C | IRR | |
| 13634.0 | 1887-04-30 | 1889-05-11 | 0.375 | 0.0 | C | IRR | |
| 26764.23527 | 1914-06-01 | 1924-04-14 | 2.36 | 0.0 | C | IRR | 160 |
| 27132.27059 | 1924-02-01 | 1937-01-11 | 3.785 | 0.0 | C | IRR | 181S |
Legal record & documents
27 decreed actions on record across
6 court cases:
CA3102, 15CW3043, 07CW0071, W0076, CA2411, CA2751.
Every case, dated
| Case | Actions | Latest adjudication | Types |
|---|---|---|---|
CA3102 | 1 | 1937-01-11 | S |
15CW3043 | 10 | 1937-01-11 | O, S |
07CW0071 | 10 | 1937-01-11 | O, S |
W0076 | 1 | 1924-04-14 | S |
CA2411 | 2 | 1924-04-14 | S |
CA2751 | 3 | 1889-05-11 | 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 578 AF. Its most recent year on record, 2025, came in at 343 AF — 59% of that, and 5th 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) |
|---|---|---|---|---|
| 1989 | 0 | 1st lowest of 15 · 0% of median | 3 | 0.0 |
| 1990 | 0 | 1st lowest of 15 · 0% of median | 1 | 0.0 |
| 2002 | 53 | 3rd lowest of 15 · 9% of median | 54 | 0.5 |
| 2014 | 312 | 4th lowest of 15 · 54% of median | 100 | 3.6 |
| 2015 | 915 | 12th lowest of 15 · 158% of median | 203 | 3.3 |
| 2016 | 1,079 | 14th lowest of 15 · 187% of median | 149 | 4.8 |
| 2017 | 820 | 11th lowest of 15 · 142% of median | 117 | 7.3 |
| 2018 | 560 | 7th lowest of 15 · 97% of median | 72 | 5.4 |
| 2019 | 1,358 | 15th lowest of 15 · 235% of median | 159 | 7.7 |
| 2020 | 691 | 9th lowest of 15 · 120% of median | 159 | 6.3 |
| 2021 | 578 | 8th lowest of 15 · 100% of median | 151 | 4.6 |
| 2022 | 552 | 6th lowest of 15 · 96% of median | 181 | 3.7 |
| 2023 | 698 | 10th lowest of 15 · 121% of median | 121 | 4.7 |
| 2024 | 991 | 13th lowest of 15 · 172% of median | 157 | 4.1 |
| 2025 | 343 | 5th lowest of 15 · 59% of median | 61 | 3.4 |
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 | 5 right(s), seniority decoded |
| diversion record | present | 2674 measured days; currency unknown (no data-coverage date to compare against) |
| record continuity | sparse | 23% of the irrigation seasons in 1971-2025 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.