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LOST LAKES RESERVOIR
Structure dossier · WDID 2003546 · 3 · LOST LAKE CREEK · DWR record
Where this page's figures come from
Generated 2026-08-27 20:29 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.
Which of its rights get called out?
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 1903-06-03 — 739th most senior of the 8016 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: RASBERRY GULCH D 2 (1903-05-31). Immediately behind: MILL CR RES (1903-06-03).
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 |
|---|---|---|---|---|---|---|---|
| 19511.0 | 1903-06-03 | 1916-09-13 | 0.0 | 0.0 | A | IRRREC | 1916-63A |
| 20909.0 | 1907-04-01 | 1916-09-13 | 1186.8 | 0.0 | A | IRRREC | 1916-67C |
Recorded use (last 15 years on record)
In a median year this structure has a recorded diversion of 4 AF. Its most recent year on record, 2008, came in at 319 AF — 7975% of that, and 4th lowest of the 4 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) |
|---|---|---|---|---|---|
| 1999 | — | no recorded volume | 287 | 0 | — |
| 2000 | — | no recorded volume | 203 | 0 | — |
| 2001 | 3 | 1st lowest of 4 · 75% of median | 5 | 2 | 1.7 |
| 2002 | 3 | 1st lowest of 4 · 75% of median | — | 2 | 1.5 |
| 2003 | 5 | 3rd lowest of 4 · 125% of median | 172 | 8 | 0.6 |
| 2004 | — | no recorded volume | 22 | 0 | — |
| 2005 | — | no recorded volume | 110 | 0 | — |
| 2008 | 319 | 4th lowest of 4 · 7975% of median | 392 | 13 | 16.7 |
| 2009 | — | no recorded volume | 32 | 0 | — |
| 2015 | — | no recorded volume | 3 | 0 | — |
| 2016 | — | no recorded volume | 92 | 0 | — |
| 2018 | — | no recorded volume | 0 | 0 | — |
| 2019 | — | no recorded volume | 136 | 0 | — |
| 2024 | — | no recorded volume | 151 | 0 | — |
| 2025 | — | no recorded volume | 144 | 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.