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MUSGRAVE RESERVOIR
Structure dossier · WDID 5103688 · 3 · ROCK CREEK · DWR record
Where this page's figures come from
Generated 2026-08-27 22:35 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 1910-04-11 — 801st most senior of the 2208 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: TILLOTSON WELL NO 3 (1969-12-31). Immediately behind: SCHMIEDBAUER SPG & PL (1963-05-20).
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 |
|---|---|---|---|---|---|---|---|
| 43829.22015 | 1910-04-11 | 1970-12-31 | 312.17 | 0.0 | A | IRRDOMSTK |
Legal record & documents
5 decreed actions on record across
5 court cases:
W0840, W0036, CA0259, CA0183, 84CW0218.
Every case, dated
| Case | Actions | Latest adjudication | Types |
|---|---|---|---|
W0840 | 1 | 1970-12-31 | S |
W0036 | 1 | 1970-12-31 | S |
CA0259 | 1 | 1919-07-12 | S |
CA0183 | 1 | 1911-08-03 | S |
84CW0218 | 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 13 years on record)
In a median year this structure has a recorded diversion of 456 AF. Its most recent year on record, 2024, came in at 1,480 AF — 325% of that, and 10th lowest of the 11 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 | 248 | 0 | — |
| 1987 | 512 | 8th lowest of 11 · 112% of median | 159 | 79 | 10.5 |
| 1988 | 342 | 4th lowest of 11 · 75% of median | 464 | 62 | 4.0 |
| 1989 | 321 | 2nd lowest of 11 · 70% of median | 425 | 37 | 8.0 |
| 1990 | 361 | 5th lowest of 11 · 79% of median | — | 16 | 14.0 |
| 1991 | 456 | 6th lowest of 11 · 100% of median | — | 36 | 7.5 |
| 1992 | 479 | 7th lowest of 11 · 105% of median | — | 30 | 10.0 |
| 2017 | 321 | 2nd lowest of 11 · 70% of median | — | 19 | 9.0 |
| 2018 | — | no recorded volume | 293 | 0 | — |
| 2019 | 307 | 1st lowest of 11 · 67% of median | 266 | 19 | 10.0 |
| 2022 | 1,664 | 11th lowest of 11 · 365% of median | 1,580 | 153 | 10.0 |
| 2023 | 1,441 | 9th lowest of 11 · 316% of median | 1,358 | 128 | 10.0 |
| 2024 | 1,480 | 10th lowest of 11 · 325% of median | 1,317 | 134 | 12.0 |
Trends for this structure
Recorded use shows no clear trend over its last 11 recorded years — which is itself worth knowing.
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 | 1 right(s), seniority decoded |
| diversion record | present | 713 measured days; currency unknown (no data-coverage date to compare against) |
| record continuity | sparse | 7% 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.