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CALHOUN DITCH
Structure dossier · WDID 4300563 · 1 · WHITE RIVER · DWR record
Where this page's figures come from
Generated 2026-08-27 23:03 by Hydrohistorian. Sources: DWR HydroBase snapshot HydroBase_CO_20260707 (history) + CDSS REST (current), USGS NWIS cross-checks. Engine v0.5.0 (a1c9146) — 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 1883-08-25 — 594th most senior of the 3293 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: FOURTEEN MILE CR D NO 2 (1892-09-01). Immediately behind: HAY DITCH 2 (1883-08-25).
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 |
|---|---|---|---|---|---|---|---|
| 19237.1229 | 1883-08-25 | 1902-09-03 | 2.4 | 0.0 | C | IRR | 129 |
| 32172.12301 | 1883-09-05 | 1942-05-26 | 1.67 | 0.0 | C | IRR | 332 |
| 32172.13971 | 1888-04-01 | 1942-05-26 | 1.3 | 0.0 | C | IRR | 336 |
| 32172.13972 | 1888-04-02 | 1942-05-26 | 1.94 | 0.0 | C | IRR | 337 |
| 39776.35063 | 1945-12-31 | 1966-11-21 | 0.86 | 0.0 | C | IRR | 637 |
Legal record & documents
5 decreed actions on record across
3 court cases:
CA1269, CA0624, 89CW0195.
Every case, dated
| Case | Actions | Latest adjudication | Types |
|---|---|---|---|
CA1269 | 1 | 1966-11-21 | S |
CA0624 | 2 | 1942-05-26 | S |
89CW0195 | 2 | 1942-05-26 | 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 208 AF. Its most recent year on record, 2023, came in at 171 AF — 82% of that, and 7th 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) |
|---|---|---|---|---|
| 2009 | 143 | 5th lowest of 15 · 69% of median | 33 | 4.0 |
| 2010 | 222 | 9th lowest of 15 · 107% of median | 46 | 4.0 |
| 2011 | 301 | 14th lowest of 15 · 145% of median | 48 | 4.1 |
| 2012 | 278 | 12th lowest of 15 · 134% of median | 51 | 4.0 |
| 2013 | 135 | 4th lowest of 15 · 65% of median | 28 | 4.0 |
| 2014 | 565 | 15th lowest of 15 · 272% of median | 101 | 3.0 |
| 2015 | 131 | 3rd lowest of 15 · 63% of median | 49 | 3.0 |
| 2016 | 223 | 10th lowest of 15 · 107% of median | 25 | 7.5 |
| 2017 | 285 | 13th lowest of 15 · 137% of median | 39 | 4.4 |
| 2018 | 0 | 1st lowest of 15 · 0% of median | 2 | 0.0 |
| 2019 | 255 | 11th lowest of 15 · 123% of median | 34 | 3.9 |
| 2020 | 0 | 1st lowest of 15 · 0% of median | 2 | 0.0 |
| 2021 | 208 | 8th lowest of 15 · 100% of median | 62 | 1.8 |
| 2022 | 145 | 6th lowest of 15 · 70% of median | 43 | 1.8 |
| 2023 | 171 | 7th lowest of 15 · 82% of median | 41 | 2.2 |
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 (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 | 5 right(s), seniority decoded |
| diversion record | present | 2391 measured days; currency unknown (no data-coverage date to compare against) |
| record continuity | sparse | 18% of the irrigation seasons in 1965-2025 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.