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TWIN LAKES RES
Structure dossier · WDID 0303684 · 3 · CACHE LA POUDRE RIVER · DWR record
Where this page's figures come from
Generated 2026-08-28 00:09 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 1904-10-17 — 252nd most senior of the 2961 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: ZIMMERMAN LAKE RES (1904-10-04). Immediately behind: NORTH POUDRE RES 11 (1904-11-02).
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 |
|---|---|---|---|---|---|---|---|
| 20066.20013 | 1904-10-17 | 1922-04-22 | 278.0 | 0.0 | A | IRR |
Legal record & documents
2 decreed actions on record across
2 court cases:
CA2031, 01CW0273.
Every case, dated
| Case | Actions | Latest adjudication | Types |
|---|---|---|---|
CA2031 | 1 | 1922-04-22 | S |
01CW0273 | 1 | 1922-04-22 | 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 15 years on record)
In a median year this structure has a recorded diversion of 281 AF. Its most recent year on record, 2024, came in at 218 AF — 78% of that, and 6th lowest of the 15 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) |
|---|---|---|---|---|---|
| 2005 | 145 | 2nd lowest of 15 · 52% of median | 145 | 36 | 9.6 |
| 2008 | 73 | 1st lowest of 15 · 26% of median | 73 | 8 | 14.6 |
| 2009 | 195 | 5th lowest of 15 · 69% of median | 195 | 64 | 4.1 |
| 2010 | 271 | 7th lowest of 15 · 96% of median | 271 | 51 | 8.6 |
| 2011 | 290 | 10th lowest of 15 · 103% of median | 248 | 82 | 11.6 |
| 2014 | 295 | 11th lowest of 15 · 105% of median | 285 | 58 | 12.6 |
| 2015 | 281 | 8th lowest of 15 · 100% of median | 254 | 50 | 7.6 |
| 2016 | 289 | 9th lowest of 15 · 103% of median | 452 | 45 | 7.1 |
| 2017 | 447 | 15th lowest of 15 · 159% of median | 288 | 53 | 35.0 |
| 2018 | 169 | 3rd lowest of 15 · 60% of median | 165 | 44 | 5.6 |
| 2019 | 303 | 12th lowest of 15 · 108% of median | 277 | 34 | 12.6 |
| 2020 | 172 | 4th lowest of 15 · 61% of median | 118 | 34 | 12.1 |
| 2021 | 327 | 13th lowest of 15 · 116% of median | 308 | 40 | 11.1 |
| 2023 | 341 | 14th lowest of 15 · 121% of median | 272 | 35 | 11.6 |
| 2024 | 218 | 6th lowest of 15 · 78% of median | 177 | 32 | 18.7 |
Trends for this structure
Recorded use is rising over its last 15 recorded years (+7 AF/yr, Mann-Kendall p=0.048).
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 | 1273 measured days; currency unknown (no data-coverage date to compare against) |
| record continuity | sparse | 12% of the irrigation seasons in 1973-2024 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.