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UPPER CALAHAN DITCH
Structure dossier · WDID 8000750 · DITCH · GIBBS GULCH · DWR record
Where this page's figures come from
Generated 2026-08-27 20:51 by Hydrohistorian. Sources: DWR HydroBase snapshot HydroBase_CO_20260707 (history) + CDSS REST (current), USGS NWIS cross-checks. Engine v0.5.0 (0576005) — 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.
Current administration
● In priority — no active call senior to this structure's rights affects its district (23 active call(s) checked).
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 1890-06-01 — 803rd most senior of the 21881 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: 0208206 (1890-06-01). Immediately behind: 2306417 (1890-06-05).
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 |
|---|---|---|---|---|---|---|---|
| 14762.0 | 1890-06-01 | 1913-05-22 | 0.5 | 0.0 | C | IRR |
Recorded use (last 15 years on record)
In a median year this structure has a recorded diversion of 20 AF. Its most recent year on record, 2019, came in at 7 AF — 35% of that, and 4th 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) |
|---|---|---|---|---|
| 1982 | 20 | 8th lowest of 15 · 100% of median | 21 | 0.5 |
| 1983 | 61 | 13th lowest of 15 · 305% of median | 40 | 1.0 |
| 1984 | 63 | 14th lowest of 15 · 315% of median | 65 | 0.5 |
| 1985 | 39 | 11th lowest of 15 · 195% of median | 43 | 0.5 |
| 1986 | 14 | 7th lowest of 15 · 70% of median | 15 | 0.5 |
| 1987 | 22 | 10th lowest of 15 · 110% of median | 23 | 0.5 |
| 1988 | 5 | 2nd lowest of 15 · 25% of median | 12 | 0.2 |
| 1996 | 41 | 12th lowest of 15 · 205% of median | 46 | 0.5 |
| 1997 | 74 | 15th lowest of 15 · 370% of median | 77 | 0.5 |
| 2009 | 12 | 6th lowest of 15 · 60% of median | 13 | 0.5 |
| 2010 | 6 | 3rd lowest of 15 · 30% of median | 32 | 0.1 |
| 2011 | 20 | 8th lowest of 15 · 100% of median | 82 | 0.1 |
| 2014 | 11 | 5th lowest of 15 · 55% of median | 45 | 0.1 |
| 2017 | 1 | 1st lowest of 15 · 5% of median | 6 | 0.1 |
| 2019 | 7 | 4th lowest of 15 · 35% of median | 43 | 0.2 |
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.