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CHAPMAN RES
Structure dossier · WDID 5803506 · 3 · LITTLE OAK CREEK · DWR record
Where this page's figures come from
Generated 2026-08-27 20:52 by Hydrohistorian. Sources: DWR HydroBase snapshot HydroBase_CO_20260707 (history) + CDSS REST (current), USGS NWIS cross-checks. Engine v0.5.0 (a1c9146) — 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 1926-08-30 — 750th most senior of the 3097 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: DIAMOND PARK DITCH (1921-06-15). Immediately behind: SANDELIN DITCH (1933-07-13).
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 |
|---|---|---|---|---|---|---|---|
| 39254.28 | 1926-08-30 | 1964-03-30 | 159.9 | 0.0 | A | IRR | 8 |
| 39254.34911 | 1945-08-01 | 1964-03-30 | 86.6 | 0.0 | A | IRR | 20 |
Recorded use (last 15 years on record)
In a median year this structure has a recorded diversion of 28 AF. Its most recent year on record, 2015, came in at 29 AF — 104% of that, and 4th lowest of the 5 years with a recorded volume.
This structure records both diversions and reservoir releases — they are separate water movements and are accounted separately below.
| 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 | Released (AF) | Days recorded | Peak (cfs) |
|---|---|---|---|---|---|
| 2010 | — | no recorded volume | 162 | 0 | — |
| 2011 | 1 | 1st lowest of 5 · 4% of median | — | 31 | 0.0 |
| 2012 | 28 | 3rd lowest of 5 · 100% of median | 286 | 232 | 0.1 |
| 2013 | 258 | 5th lowest of 5 · 921% of median | 468 | 335 | 3.0 |
| 2014 | 26 | 2nd lowest of 5 · 93% of median | 575 | 299 | 0.1 |
| 2015 | 29 | 4th lowest of 5 · 104% of median | 451 | 174 | 0.2 |
| 2016 | — | no recorded volume | 235 | 0 | — |
| 2017 | — | no recorded volume | 233 | 0 | — |
| 2018 | — | no recorded volume | 290 | 0 | — |
| 2019 | — | no recorded volume | 295 | 0 | — |
| 2020 | — | no recorded volume | 216 | 0 | — |
| 2021 | — | no recorded volume | 85 | 0 | — |
| 2022 | — | no recorded volume | 193 | 0 | — |
| 2023 | — | no recorded volume | 171 | 0 | — |
| 2024 | — | no recorded volume | 334 | 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.