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ROSEMONT RESERVOIR
Structure dossier · WDID 1203820 · 3 · EAST BEAVER CREEK · DWR record
Where this page's figures come from
Generated 2026-08-27 19:51 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 in line
Priority 1930-08-20 — 618th most senior of the 1967 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: PEDRIE WELL NO 2 (1930-06-30). Immediately behind: DONNELLY WELL NO 1 (1930-12-31).
Decreed rights (4)
| 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 |
|---|---|---|---|---|---|---|---|
| 29451.0 | 1930-08-20 | 1954-03-13 | 1229.01 | 0.0 | A | MUNDOMPWR | A-9 |
| 40451.0 | 1960-10-01 | 1968-02-16 | 1198.7 | 0.0 | A | IRRMUNDOM | B-23 |
| 48942.48175 | 1981-11-24 | 1984-12-31 | 0.0 | 0.0 | C | ALL | |
| 49673.49387 | 1985-03-20 | 1986-12-31 | 0.0 | 0.0 | C | ALL |
Recorded use (last 13 years on record)
In a median year this structure has a recorded diversion of 1,407 AF. Its most recent year on record, 2025, came in at 1,026 AF — 73% of that, and 4th lowest of the 13 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) |
|---|---|---|---|---|---|
| 1991 | 222 | 2nd lowest of 13 · 16% of median | — | 16 | 11.1 |
| 2014 | 152 | 1st lowest of 13 · 11% of median | 92 | 61 | 3.1 |
| 2015 | 2,341 | 13th lowest of 13 · 166% of median | 564 | 365 | 25.8 |
| 2016 | 1,869 | 11th lowest of 13 · 133% of median | 498 | 366 | 7.9 |
| 2017 | 1,407 | 7th lowest of 13 · 100% of median | 834 | 365 | 9.2 |
| 2018 | 681 | 3rd lowest of 13 · 48% of median | 1,077 | 365 | 3.9 |
| 2019 | 1,593 | 8th lowest of 13 · 113% of median | 926 | 365 | 7.4 |
| 2020 | 1,136 | 5th lowest of 13 · 81% of median | 851 | 366 | 7.4 |
| 2021 | 2,270 | 12th lowest of 13 · 161% of median | 669 | 365 | 36.6 |
| 2022 | 1,370 | 6th lowest of 13 · 97% of median | 675 | 365 | 6.3 |
| 2023 | 1,669 | 9th lowest of 13 · 119% of median | 360 | 365 | 9.4 |
| 2024 | 1,695 | 10th lowest of 13 · 120% of median | 415 | 366 | 9.7 |
| 2025 | 1,026 | 4th lowest of 13 · 73% of median | 288 | 304 | 11.0 |
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.