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WALTHEN DITCH
Structure dossier · WDID 3801132 · 1 · WOODY CREEK · DWR record
Where this page's figures come from
Generated 2026-08-27 23:14 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 1883-05-10 — 97th most senior of the 4788 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: MERRILL DIVERSION (1883-05-02). Immediately behind: ODONNELL PUMP & PIPELINE (1883-05-10).
Decreed rights (3)
| 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 |
|---|---|---|---|---|---|---|---|
| 12183.0 | 1883-05-10 | 1889-05-11 | 2.9443 | 0.0 | C | IRRINDDOMOTH | 65 |
| 12543.0 | 1884-05-04 | 1889-05-11 | 2.533 | 0.0 | C | IRRAUGOTH | 88 |
| 30941.24258 | 1916-06-01 | 1936-08-25 | 10.8 | 0.0 | C | IRROTH | 403K |
Legal record & documents
16 decreed actions on record across
8 court cases:
CA3082, 05CW0143, W2909, CA4033, CA0132, 98CW0100, 94CW0299, 90CW0335.
Every case, dated
| Case | Actions | Latest adjudication | Types |
|---|---|---|---|
CA3082 | 1 | 1936-08-25 | S |
05CW0143 | 6 | 1936-08-25 | O, S |
W2909 | 1 | 1889-05-11 | O |
CA4033 | 2 | 1889-05-11 | O |
CA0132 | 2 | 1889-05-11 | O |
98CW0100 | 2 | 1889-05-11 | O |
94CW0299 | 1 | 1889-05-11 | O |
90CW0335 | 1 | 1889-05-11 | 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 15 years on record)
In a median year this structure has a recorded diversion of 1,802 AF. Its most recent year on record, 2024, came in at 1,510 AF — 84% of that, and 2nd lowest of the 15 years with a recorded volume.
This structure records both diversions and reservoir releases — they are separate water movements and are accounted separately below.
| 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 | Released (AF) | Days recorded | Peak (cfs) |
|---|---|---|---|---|---|
| 2010 | 1,701 | 4th lowest of 15 · 94% of median | — | 160 | 7.0 |
| 2011 | 1,889 | 10th lowest of 15 · 105% of median | — | 169 | 9.5 |
| 2012 | 1,787 | 7th lowest of 15 · 99% of median | — | 185 | 12.4 |
| 2013 | 1,483 | 1st lowest of 15 · 82% of median | — | 186 | 8.5 |
| 2014 | 2,554 | 15th lowest of 15 · 142% of median | — | 178 | 12.4 |
| 2015 | 2,457 | 14th lowest of 15 · 136% of median | — | 192 | 10.0 |
| 2016 | 1,812 | 9th lowest of 15 · 101% of median | 76 | 184 | 7.2 |
| 2017 | 2,085 | 13th lowest of 15 · 116% of median | 8 | 191 | 8.3 |
| 2018 | 1,802 | 8th lowest of 15 · 100% of median | 9 | 214 | 16.4 |
| 2019 | 2,073 | 12th lowest of 15 · 115% of median | 8 | 185 | 12.0 |
| 2020 | 1,959 | 11th lowest of 15 · 109% of median | 9 | 251 | 10.6 |
| 2021 | 1,742 | 5th lowest of 15 · 97% of median | 9 | 239 | 8.5 |
| 2022 | 1,767 | 6th lowest of 15 · 98% of median | — | 206 | 8.5 |
| 2023 | 1,623 | 3rd lowest of 15 · 90% of median | 9 | 214 | 11.3 |
| 2024 | 1,510 | 2nd lowest of 15 · 84% of median | 9 | 214 | 8.0 |
Trends for this structure
Recorded use shows no clear trend over its last 15 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 | 3 right(s), seniority decoded |
| diversion record | present | 10083 measured days; currency unknown (no data-coverage date to compare against) |
| record continuity | patchy | 63% of the irrigation seasons in 1950-2024 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.