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WESTLAKE DITCH
Structure dossier · WDID 3600868 · 1 · CATARACT CREEK · DWR record
Where this page's figures come from
Generated 2026-08-27 20:49 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.
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 1889-06-01 — 94th 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: LAWSON DITCH (1889-06-01). Immediately behind: INDEPENDENT BLUE (ACORN) (1889-06-01).
Decreed rights (5)
| 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 |
|---|---|---|---|---|---|---|---|
| 14397.0 | 1889-06-01 | 1910-03-02 | 5.07 | 0.0 | C | IRR | 62 |
| 14929.0 | 1890-11-15 | 1910-03-02 | 4.0 | 0.0 | C | IRR | 77 |
| 16588.0 | 1895-06-01 | 1910-03-02 | 2.0 | 0.0 | C | IRR | 97 |
| 19413.0 | 1903-02-25 | 1910-03-02 | 3.0 | 0.0 | C | IRR | 142 |
| 20696.0 | 1906-08-31 | 1910-03-02 | 2.0 | 0.0 | C | IRR | 173 |
Recorded use (last 15 years on record)
In a median year this structure has a recorded diversion of 1,730 AF. Its most recent year on record, 2024, came in at 1,331 AF — 77% of that, and 4th lowest of the 15 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) |
|---|---|---|---|---|
| 2010 | 2,240 | 10th lowest of 15 · 130% of median | 151 | 16.9 |
| 2011 | 3,067 | 15th lowest of 15 · 177% of median | 137 | 20.8 |
| 2012 | 3,059 | 14th lowest of 15 · 177% of median | 206 | 18.8 |
| 2013 | 2,239 | 9th lowest of 15 · 129% of median | 176 | 16.0 |
| 2014 | 2,242 | 11th lowest of 15 · 130% of median | 187 | 16.0 |
| 2015 | 2,558 | 13th lowest of 15 · 148% of median | 186 | 16.0 |
| 2016 | 1,620 | 7th lowest of 15 · 94% of median | 157 | 14.0 |
| 2017 | 2,409 | 12th lowest of 15 · 139% of median | 190 | 17.8 |
| 2018 | 1,423 | 5th lowest of 15 · 82% of median | 95 | 16.0 |
| 2019 | 1,559 | 6th lowest of 15 · 90% of median | 149 | 11.6 |
| 2020 | 1,730 | 8th lowest of 15 · 100% of median | 85 | 15.9 |
| 2021 | 1,244 | 3rd lowest of 15 · 72% of median | 116 | 16.0 |
| 2022 | 1,185 | 2nd lowest of 15 · 68% of median | 157 | 13.3 |
| 2023 | 1,170 | 1st lowest of 15 · 68% of median | 114 | 12.8 |
| 2024 | 1,331 | 4th lowest of 15 · 77% of median | 78 | 15.0 |
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.