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R WILLIAMS NO 1 DITCH (WEST BANK)

Structure dossier · WDID 5100868 · 1 · ROCK CREEK · DWR record

Where this page's figures come from

Generated 2026-08-27 23:12 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 1917-04-16 — 315th most senior of the 2208 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: POLE CREEK DITCH (1916-06-29). Immediately behind: R WILLIAMS NO 2 DITCH (EAST BANK) (1917-04-18).

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
24577.01917-04-161917-08-11 0.6250.0 CIRR 343

Recorded use (last 15 years on record)

In a median year this structure has a recorded diversion of 72 AF. Its most recent year on record, 2024, came in at 55 AF — 76% of that, and 5th lowest of the 15 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)
2010 155 15th lowest of 15 · 215% of median 68 1.4
2011 85 12th lowest of 15 · 118% of median 51 1.7
2012 49 4th lowest of 15 · 68% of median 59 0.5
2013 72 8th lowest of 15 · 100% of median 60 0.7
2014 87 13th lowest of 15 · 121% of median 64 0.8
2015 82 10th lowest of 15 · 114% of median 60 0.7
2016 72 8th lowest of 15 · 100% of median 50 1.2
2017 60 6th lowest of 15 · 83% of median 41 1.5
2018 61 7th lowest of 15 · 85% of median 55 1.0
2019 84 11th lowest of 15 · 117% of median 55 1.3
2020 31 2nd lowest of 15 · 43% of median 53 0.5
2021 27 1st lowest of 15 · 38% of median 44 0.5
2022 147 14th lowest of 15 · 204% of median 68 2.0
2023 41 3rd lowest of 15 · 57% of median 53 0.5
2024 55 5th lowest of 15 · 76% of median 57 0.8

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
CheckStateDetail
identity complete name, type, and water source all on file
decreed rights on file 1 right(s), seniority decoded
diversion record present 1786 measured days; currency unknown (no data-coverage date to compare against)
record continuity sparse 28% of the irrigation seasons in 1995-2024 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.