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ARAPAHOE BASIN SNOWLINE
Structure dossier · WDID 3601092 · 1 · SNAKE 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 1984-01-23 — 745th most senior of the 1247 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: BLUE RIVER VALLEY RANCH RESERVOIR DIVERS (1983-09-07). Immediately behind: MONTEZUMA BOWL/PORCUPINE PEAK SNOWLINE (1984-01-23).
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 |
|---|---|---|---|---|---|---|---|
| 48965.0 | 1984-01-23 | 1955-10-12 | 0.0 | 0.0 | A | SNO | |
| 48965.0 | 1984-01-23 | 1955-10-12 | 1.1 | 0.0 | C | SNO |
Legal record & documents
6 decreed actions on record across
4 court cases:
98CW0095, 85CW0614, 92CW0331, 95CW0197.
Every case, dated
| Case | Actions | Latest adjudication | Types |
|---|---|---|---|
98CW0095 | 1 | 1985-12-31 | S |
85CW0614 | 3 | 1985-12-31 | O, S |
92CW0331 | 1 | 1972-05-30 | S |
95CW0197 | 1 | 1955-10-12 | O |
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 12 years on record)
In a median year this structure has a recorded diversion of 52 AF. Its most recent year on record, 2024, came in at 11 AF — 21% of that, and 1st lowest of the 12 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) |
|---|---|---|---|---|
| 2013 | 54 | 7th lowest of 12 · 105% of median | 47 | 1.5 |
| 2014 | 105 | 12th lowest of 12 · 204% of median | 63 | 2.9 |
| 2015 | 36 | 3rd lowest of 12 · 70% of median | 58 | 1.0 |
| 2016 | 47 | 5th lowest of 12 · 91% of median | 85 | 1.3 |
| 2017 | 67 | 10th lowest of 12 · 130% of median | 127 | 1.7 |
| 2018 | 41 | 4th lowest of 12 · 80% of median | 127 | 1.2 |
| 2019 | 55 | 8th lowest of 12 · 107% of median | 113 | 1.5 |
| 2020 | 49 | 6th lowest of 12 · 95% of median | 94 | 3.3 |
| 2021 | 72 | 11th lowest of 12 · 140% of median | 94 | 4.0 |
| 2022 | 59 | 9th lowest of 12 · 115% of median | 103 | 1.5 |
| 2023 | 20 | 2nd lowest of 12 · 39% of median | 330 | 2.0 |
| 2024 | 11 | 1st lowest of 12 · 21% of median | 31 | 1.5 |
Trends for this structure
Recorded use shows no clear trend over its last 12 recorded years — which is itself worth knowing.
How good is our record of it?
Grade B (8/10 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 | 2 right(s), seniority decoded |
| diversion record | present | 1272 measured days; currency unknown (no data-coverage date to compare against) |
| record continuity | patchy | 54% of the irrigation seasons in 2013-2024 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.