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COMBS DITCH
Structure dossier · WDID 1200773 · 1 · WILSON CREEK · DWR record
Where this page's figures come from
Generated 2026-08-27 23:48 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 1880-04-01 — 401st most senior of the 1967 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: GRAVESTOCK DITCH (1874-04-01). Immediately behind: PAUL WALTON DITCH (1911-04-01).
Decreed rights (2)
| 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 |
|---|---|---|---|---|---|---|---|
| 24970.11049 | 1880-04-01 | 1920-01-05 | 1.8 | 0.0 | C | IRRDOM | |
| 33859.11049 | 1880-04-01 | 1948-06-18 | 1.8 | 0.0 | C | IRRDOM | 1948-1 |
Legal record & documents
2 decreed actions on record across
2 court cases:
CA6190, CA4170.
Every case, dated
| Case | Actions | Latest adjudication | Types |
|---|---|---|---|
CA6190 | 1 | 1948-06-18 | S |
CA4170 | 1 | 1920-01-05 | S |
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 24 AF. Its most recent year on record, 2025, came in at 0 AF — 0% of that, and 1st 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) |
|---|---|---|---|---|
| 1971 | 113 | 13th lowest of 15 · 471% of median | 115 | 0.5 |
| 1972 | 188 | 14th lowest of 15 · 783% of median | 163 | 0.7 |
| 1973 | 237 | 15th lowest of 15 · 988% of median | 154 | 1.5 |
| 1976 | 0 | 1st lowest of 15 · 0% of median | 1 | 0.0 |
| 1980 | 69 | 10th lowest of 15 · 288% of median | 71 | 0.5 |
| 1983 | 36 | 9th lowest of 15 · 150% of median | 21 | 1.0 |
| 1984 | 24 | 8th lowest of 15 · 100% of median | 32 | 0.8 |
| 2017 | 73 | 11th lowest of 15 · 304% of median | 167 | 0.2 |
| 2018 | 0 | 1st lowest of 15 · 0% of median | 1 | 0.0 |
| 2019 | 108 | 12th lowest of 15 · 450% of median | 110 | 0.5 |
| 2020 | 13 | 7th lowest of 15 · 54% of median | 123 | 0.1 |
| 2021 | 2 | 6th lowest of 15 · 8% of median | 23 | 0.0 |
| 2022 | 0 | 1st lowest of 15 · 0% of median | 1 | 0.0 |
| 2024 | 0 | 1st lowest of 15 · 0% of median | 3 | 0.0 |
| 2025 | 0 | 1st lowest of 15 · 0% of median | 1 | 0.0 |
Trends for this structure
Recorded use is falling over its last 15 recorded years (-2 AF/yr, Mann-Kendall p=0.006).
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
| Check | State | Detail |
|---|---|---|
| identity | complete | name, type, and water source all on file |
| decreed rights | on file | 2 right(s), seniority decoded |
| diversion record | present | 1146 measured days; currency unknown (no data-coverage date to compare against) |
| record continuity | sparse | 10% of the irrigation seasons in 1970-2025 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.