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GAY A-2
Structure dossier · WDID 7201785 · 8 · MACK WASH · DWR record
Where this page's figures come from
Generated 2026-08-27 20:30 by Hydrohistorian. Sources: DWR HydroBase snapshot HydroBase_CO_20260707 (history) + CDSS REST (current), USGS NWIS cross-checks. Engine v0.5.0 (a1c9146) — 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 1974-11-19 — 1131st most senior of the 2166 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: GAY PIPELINE A & B (1974-11-19). Immediately behind: GAY A (1974-11-19).
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 |
|---|---|---|---|---|---|---|---|
| 45655.45613 | 1974-11-19 | 1975-12-31 | 0.75 | 0.0 | C | IRR |
Recorded use (last 4 years on record)
In a median year this structure has a recorded diversion of 51 AF. Its most recent year on record, 2021, came in at 52 AF — 102% of that, and 3rd lowest of the 4 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 | 40 | 1st lowest of 4 · 78% of median | 127 | 0.4 |
| 2019 | 50 | 2nd lowest of 4 · 98% of median | 122 | 0.4 |
| 2020 | 59 | 4th lowest of 4 · 116% of median | 150 | 0.4 |
| 2021 | 52 | 3rd lowest of 4 · 102% of median | 134 | 0.4 |
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.