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WILLSON DITCH AP

Structure dossier · WDID 5901746 · 1 · WASHINGTON GULCH · DWR record

Where this page's figures come from

Generated 2026-08-27 23:01 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 1901-05-12 — 236th most senior of the 2360 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: WILLSON DITCH (1901-05-12). Immediately behind: WHIPP DITCH (1901-05-20).

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. UnitsUsesWhat the court said this water may be used for -- irrigation, municipal supply, augmentation and so on.Case
18759.01901-05-121906-09-14 0.00.0 CIRR 142

Recorded use (last 14 years on record)

In a median year this structure has a recorded diversion of 357 AF. Its most recent year on record, 2025, came in at 177 AF — 50% of that, and 1st lowest of the 14 years with a recorded volume.

YearDiverted (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 recordDays recordedPeak (cfs)
2012 473 10th lowest of 14 · 132% of median 184 7.0
2013 376 8th lowest of 14 · 105% of median 148 3.7
2014 338 7th lowest of 14 · 95% of median 98 4.1
2015 603 14th lowest of 14 · 169% of median 152 3.6
2016 266 5th lowest of 14 · 74% of median 154 1.2
2017 509 11th lowest of 14 · 143% of median 118 5.0
2018 198 3rd lowest of 14 · 56% of median 152 3.1
2019 513 12th lowest of 14 · 144% of median 169 3.6
2020 188 2nd lowest of 14 · 53% of median 126 1.7
2021 330 6th lowest of 14 · 92% of median 166 2.3
2022 240 4th lowest of 14 · 67% of median 95 2.7
2023 382 9th lowest of 14 · 107% of median 133 3.6
2024 556 13th lowest of 14 · 156% of median 151 4.1
2025 177 1st lowest of 14 · 50% of median 126 1.9

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
CheckStateDetail
identity complete name, type, and water source all on file
decreed rights on file 1 right(s), seniority decoded
diversion record present 1972 measured days; currency unknown (no data-coverage date to compare against)
record continuity patchy 68% of the irrigation seasons in 2012-2025 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.