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GRAND LAKE WELL
Structure dossier · WDID 5105257 · 2 · TONAHUTU CREEK · DWR record
Where this page's figures come from
Generated 2026-08-27 19:49 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 1945-03-15 — 519th 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: GRAND LAKE PIPELINE (1945-03-15). Immediately behind: MORRIS RANCH WELL NO 2 (1945-07-01).
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 |
|---|---|---|---|---|---|---|---|
| 34772.0 | 1945-03-15 | 1952-11-07 | 0.0 | 0.0 | C | MUNDOM | 501 |
| 47190.0 | 1979-03-15 | 1979-12-31 | 0.55 | 0.0 | C | IRRMUNCOMINDFIRDOM |
Recorded use (last 9 years on record)
In a median year this structure has a recorded diversion of 179 AF. Its most recent year on record, 2024, came in at 237 AF — 132% of that, and 9th lowest of the 9 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) |
|---|---|---|---|---|
| 2016 | 16 | 1st lowest of 9 · 9% of median | 60 | 0.3 |
| 2017 | 123 | 2nd lowest of 9 · 69% of median | 304 | 0.7 |
| 2018 | 147 | 3rd lowest of 9 · 82% of median | 365 | 0.7 |
| 2019 | 165 | 4th lowest of 9 · 92% of median | 365 | 0.8 |
| 2020 | 188 | 6th lowest of 9 · 105% of median | 306 | 0.9 |
| 2021 | 203 | 7th lowest of 9 · 113% of median | 365 | 1.0 |
| 2022 | 217 | 8th lowest of 9 · 121% of median | 365 | 0.9 |
| 2023 | 179 | 5th lowest of 9 · 100% of median | 365 | 0.9 |
| 2024 | 237 | 9th lowest of 9 · 132% of median | 305 | 0.9 |
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.