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HINMAN RESERVOIR
Structure dossier · WDID 5003618 · 3 · PASS CREEK · DWR record
Where this page's figures come from
Generated 2026-08-28 03:02 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.
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 1910-02-28 — 101st most senior of the 360 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: TOM ENNIS DITCH HGT NO 2 (1908-08-01). Immediately behind: SLIDE DITCH (1880-12-31).
Decreed rights (3)
| 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 |
|---|---|---|---|---|---|---|---|
| 21973.0 | 1910-02-28 | 1911-08-03 | 0.0 | 0.0 | A | IRRRECFISDOMSTK | 113 |
| 32733.0 | 1939-08-15 | 1941-07-17 | 611.14 | 0.0 | A | IRR | 182 |
| 48577.4739 | 1979-10-01 | 1983-12-31 | 0.0 | 305.9 | A | IRRRECFISDOMSTK |
Legal record & documents
8 decreed actions on record across
7 court cases:
96CW0177, 89CW0083, 83CW0306, 02CW0316, CA0764, 98CW0047, 83CW0081.
Every case, dated
| Case | Actions | Latest adjudication | Types |
|---|---|---|---|
96CW0177 | 1 | 1983-12-31 | S |
89CW0083 | 1 | 1983-12-31 | S |
83CW0306 | 2 | 1983-12-31 | S |
02CW0316 | 1 | 1983-12-31 | S |
CA0764 | 1 | 1941-07-17 | S |
98CW0047 | 1 | 1911-08-03 | S |
83CW0081 | 1 | 1911-08-03 | S |
DWR's own records for this structure: net amounts · transactions & adjudication history · scanned decrees (search a case number there for the imaged document). On this site: the district's full legal picture →
Recorded use (last 6 years on record)
In a median year this structure has a recorded diversion of 454 AF. Its most recent year on record, 2024, came in at 635 AF — 140% of that, and 5th 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) |
|---|---|---|---|---|---|
| 1976 | — | no recorded volume | 149 | 0 | — |
| 1990 | 152 | 1st lowest of 5 · 34% of median | — | 10 | 8.5 |
| 2020 | 565 | 4th lowest of 5 · 124% of median | 385 | 98 | 5.0 |
| 2022 | 454 | 3rd lowest of 5 · 100% of median | 311 | 105 | 4.0 |
| 2023 | 411 | 2nd lowest of 5 · 90% of median | 326 | 79 | 4.0 |
| 2024 | 635 | 5th lowest of 5 · 140% of median | 256 | 100 | 7.0 |
How good is our record of it?
Grade B (7/10 points) — the components below are the finding; the letter alone is not.
The rubric, component by component
| Check | State | Detail |
|---|---|---|
| identity | complete | name, type, and water source all on file |
| decreed rights | on file | 3 right(s), seniority decoded |
| diversion record | present | 392 measured days; currency unknown (no data-coverage date to compare against) |
| record continuity | sparse | 4% of the irrigation seasons in 1976-2024 carry measured days |
| published-record stability | stable | no upstream revisions recorded against this structure |
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.