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ERNEST ROLL DITCH NO 4
Structure dossier · WDID 1300642 · 1 · GRAPE CREEK · DWR record
Where this page's figures come from
Generated 2026-08-27 20:40 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.
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 1879-05-05 — 277th 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: ANDREWS & BRAINARD NO 1 (1879-05-01). Immediately behind: HAMLIN DITCH NO 5 (1879-05-14).
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 |
|---|---|---|---|---|---|---|---|
| 10717.0 | 1879-05-05 | 1896-03-12 | 0.8 | 0.0 | C | IRR | 213B |
Recorded use (last 15 years on record)
In a median year this structure has a recorded diversion of 43 AF. Its most recent year on record, 2024, came in at 43 AF — 100% of that, and 7th 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) |
|---|---|---|---|---|
| 2004 | 49 | 9th lowest of 15 · 114% of median | 32 | 0.8 |
| 2005 | 61 | 11th lowest of 15 · 142% of median | 45 | 0.8 |
| 2007 | 116 | 15th lowest of 15 · 270% of median | 75 | 0.8 |
| 2008 | 113 | 14th lowest of 15 · 263% of median | 73 | 0.8 |
| 2009 | 43 | 7th lowest of 15 · 100% of median | 30 | 0.8 |
| 2010 | 19 | 5th lowest of 15 · 44% of median | 15 | 0.8 |
| 2014 | 51 | 10th lowest of 15 · 119% of median | 35 | 0.8 |
| 2015 | 87 | 13th lowest of 15 · 202% of median | 80 | 0.6 |
| 2016 | 19 | 5th lowest of 15 · 44% of median | 24 | 0.4 |
| 2017 | 64 | 12th lowest of 15 · 149% of median | 63 | 0.8 |
| 2019 | 2 | 2nd lowest of 15 · 5% of median | 3 | 0.9 |
| 2020 | 0 | 1st lowest of 15 · 0% of median | 1 | 0.0 |
| 2021 | 12 | 3rd lowest of 15 · 28% of median | 15 | 0.4 |
| 2023 | 14 | 4th lowest of 15 · 33% of median | 21 | 0.4 |
| 2024 | 43 | 7th lowest of 15 · 100% of median | 28 | 0.8 |
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.