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GRAF DITCH
Structure dossier · WDID 3400586 · 1 · WEBER CANYON · DWR record
Where this page's figures come from
Generated 2026-08-27 20:33 by Hydrohistorian. Sources: DWR HydroBase snapshot HydroBase_CO_20260707 (history) + CDSS REST (current), USGS NWIS cross-checks. Engine v0.5.0 (f6d7fdc) — 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 1975-05-20 — 394th most senior of the 495 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: NOLAND NO 1 DITCH (1954-06-20). Immediately behind: CULP DITCH (1945-04-30).
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 |
|---|---|---|---|---|---|---|---|
| 45795.0 | 1975-05-20 | 1975-12-31 | 2.0 | 0.0 | C | IRR | |
| 56388.0 | 2004-05-20 | 2004-12-31 | 0.0 | 2.0 | C | IRR |
Recorded use (last 15 years on record)
In a median year this structure has a recorded diversion of 38 AF. Its most recent year on record, 2025, 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) |
|---|---|---|---|---|
| 2010 | 164 | 14th lowest of 15 · 432% of median | 147 | 1.1 |
| 2011 | 117 | 13th lowest of 15 · 308% of median | 100 | 0.8 |
| 2012 | 206 | 15th lowest of 15 · 542% of median | 119 | 1.0 |
| 2013 | 22 | 5th lowest of 15 · 58% of median | 55 | 0.2 |
| 2014 | 93 | 12th lowest of 15 · 245% of median | 120 | 0.5 |
| 2015 | 85 | 11th lowest of 15 · 224% of median | 125 | 0.5 |
| 2016 | 22 | 5th lowest of 15 · 58% of median | 85 | 0.6 |
| 2017 | 72 | 10th lowest of 15 · 190% of median | 157 | 0.7 |
| 2018 | 38 | 7th lowest of 15 · 100% of median | 140 | 0.4 |
| 2019 | 15 | 4th lowest of 15 · 40% of median | 101 | 0.1 |
| 2020 | 0 | 1st lowest of 15 · 0% of median | 11 | 0.0 |
| 2021 | 0 | 1st lowest of 15 · 0% of median | 9 | 0.0 |
| 2022 | 38 | 7th lowest of 15 · 100% of median | 97 | 0.6 |
| 2024 | 55 | 9th lowest of 15 · 145% of median | 85 | 0.5 |
| 2025 | 0 | 1st lowest of 15 · 0% of median | 4 | 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.