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ERNEST ROLL DITCH NO 1
Structure dossier · WDID 1300639 · 1 · GRAPE CREEK · DWR record
Where this page's figures come from
Generated 2026-08-27 22:43 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 1879-05-01 — 274th most senior of the 1017 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: HOWARD DITCH NO 3 (1879-04-30). Immediately behind: CORRAL DITCH (1879-05-01).
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 |
|---|---|---|---|---|---|---|---|
| 10713.0 | 1879-05-01 | 1896-03-12 | 0.4 | 0.0 | C | IRR | 213A |
| 14792.0 | 1890-07-01 | 1896-03-12 | 0.6 | 0.0 | C | IRR | 496B |
Legal record & documents
2 decreed actions on record across
1 court case:
03/12/1896.
Every case, dated
| Case | Actions | Latest adjudication | Types |
|---|---|---|---|
03/12/1896 | 2 | 1896-03-12 | 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 10 years on record)
In a median year this structure has a recorded diversion of 10 AF. Its most recent year on record, 2023, came in at 11 AF — 116% of that, and 6th lowest of the 10 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) |
|---|---|---|---|---|
| 1969 | 0 | 1st lowest of 10 · 0% of median | 61 | 0.0 |
| 1970 | 0 | 1st lowest of 10 · 0% of median | 261 | 0.0 |
| 1975 | 62 | 9th lowest of 10 · 653% of median | 73 | 0.5 |
| 1979 | 21 | 7th lowest of 10 · 221% of median | 28 | 0.4 |
| 1980 | 31 | 8th lowest of 10 · 326% of median | 40 | 0.4 |
| 1995 | 116 | 10th lowest of 10 · 1221% of median | 117 | 0.5 |
| 1996 | 0 | 1st lowest of 10 · 0% of median | 1 | 0.0 |
| 2021 | 8 | 5th lowest of 10 · 84% of median | 10 | 0.6 |
| 2022 | 1 | 4th lowest of 10 · 10% of median | 5 | 0.2 |
| 2023 | 11 | 6th lowest of 10 · 116% of median | 21 | 0.3 |
Trends for this structure
Recorded use shows no clear trend over its last 10 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 | 617 measured days; currency unknown (no data-coverage date to compare against) |
| record continuity | sparse | 5% of the irrigation seasons in 1969-2023 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.