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BLAIR DITCH
Structure dossier · WDID 4300546 · 1 · WHITE RIVER · DWR record
Where this page's figures come from
Generated 2026-08-27 22:04 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 1883-04-15 — 932nd 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: HOLLMAN DITCH (1916-06-19). Immediately behind: BOWKLEY DITCH NO 1 (1886-11-15).
Decreed rights (4)
| 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 |
|---|---|---|---|---|---|---|---|
| 29087.12158 | 1883-04-15 | 1929-08-24 | 6.4 | 0.0 | C | IRR | 300 |
| 29087.22827 | 1912-07-01 | 1929-08-24 | 1.8 | 0.0 | C | IRR | 301 |
| 32172.22919 | 1912-10-01 | 1942-05-26 | 3.65 | 0.0 | C | IRR | 443 |
| 32172.29736 | 1931-06-01 | 1942-05-26 | 1.34 | 0.0 | C | IRR | 447 |
Legal record & documents
5 decreed actions on record across
2 court cases:
CA0624, CA0481.
Every case, dated
| Case | Actions | Latest adjudication | Types |
|---|---|---|---|
CA0624 | 2 | 1942-05-26 | S |
CA0481 | 3 | 1929-08-24 | 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 1,841 AF. Its most recent year on record, 2025, came in at 1,656 AF — 90% 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) |
|---|---|---|---|---|
| 2010 | 2,682 | 12th lowest of 15 · 146% of median | 125 | 13.0 |
| 2011 | 1,039 | 5th lowest of 15 · 56% of median | 48 | 14.0 |
| 2012 | 1,561 | 6th lowest of 15 · 85% of median | 157 | 6.4 |
| 2013 | 1,889 | 9th lowest of 15 · 103% of median | 149 | 13.2 |
| 2015 | 0 | 1st lowest of 15 · 0% of median | 2 | 0.0 |
| 2016 | 545 | 4th lowest of 15 · 30% of median | 54 | 5.8 |
| 2017 | 158 | 2nd lowest of 15 · 9% of median | 82 | 1.3 |
| 2018 | 282 | 3rd lowest of 15 · 15% of median | 143 | 1.4 |
| 2019 | 3,426 | 13th lowest of 15 · 186% of median | 108 | 25.1 |
| 2020 | 4,078 | 15th lowest of 15 · 222% of median | 142 | 16.6 |
| 2021 | 1,841 | 8th lowest of 15 · 100% of median | 95 | 10.2 |
| 2022 | 2,025 | 11th lowest of 15 · 110% of median | 103 | 13.5 |
| 2023 | 3,745 | 14th lowest of 15 · 203% of median | 152 | 18.5 |
| 2024 | 1,993 | 10th lowest of 15 · 108% of median | 112 | 14.3 |
| 2025 | 1,656 | 7th lowest of 15 · 90% of median | 102 | 15.6 |
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 | 4 right(s), seniority decoded |
| diversion record | present | 5834 measured days; currency unknown (no data-coverage date to compare against) |
| record continuity | patchy | 44% of the irrigation seasons in 1964-2025 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.