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O'BRIEN'S DITCH (W 4 ML)
Structure dossier · WDID 1200759 · 1 · WEST FOURMILE CREEK · DWR record
Where this page's figures come from
Generated 2026-08-27 20:39 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.
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 1886-08-05 — 292nd most senior of the 1967 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: HAYDEN CREEK MEADOWS 1 AUG PLAN (1886-05-31). Immediately behind: MCGREGOR DITCH (1887-05-01).
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 |
|---|---|---|---|---|---|---|---|
| 13366.0 | 1886-08-05 | 1894-02-03 | 1.0 | 0.0 | C | IRR | 342 |
Recorded use (last 15 years on record)
In a median year this structure has a recorded diversion of 69 AF. Its most recent year on record, 2008, came in at 0 AF — 0% of that, and 1st 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) |
|---|---|---|---|---|
| 1985 | 129 | 10th lowest of 15 · 187% of median | 66 | 1.0 |
| 1986 | 33 | 5th lowest of 15 · 48% of median | 34 | 0.5 |
| 1988 | 0 | 1st lowest of 15 · 0% of median | 17 | 0.0 |
| 1989 | 0 | 1st lowest of 15 · 0% of median | 14 | 0.0 |
| 1990 | 252 | 14th lowest of 15 · 365% of median | 135 | 1.0 |
| 1993 | 44 | 6th lowest of 15 · 64% of median | 35 | 1.0 |
| 1994 | 188 | 13th lowest of 15 · 272% of median | 96 | 1.0 |
| 1995 | 315 | 15th lowest of 15 · 456% of median | 159 | 1.0 |
| 1997 | 69 | 8th lowest of 15 · 100% of median | 39 | 1.0 |
| 1998 | 14 | 4th lowest of 15 · 20% of median | 15 | 1.0 |
| 1999 | 123 | 9th lowest of 15 · 178% of median | 66 | 1.0 |
| 2000 | 155 | 12th lowest of 15 · 225% of median | 83 | 1.0 |
| 2001 | 131 | 11th lowest of 15 · 190% of median | 134 | 0.5 |
| 2003 | 60 | 7th lowest of 15 · 87% of median | 63 | 0.5 |
| 2008 | 0 | 1st lowest of 15 · 0% of median | 2 | 0.0 |
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.