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SWANSON ORO GRANDE DITCH
Structure dossier · WDID 3600838 · 1 · STRAIGHT CREEK · DWR record
Where this page's figures come from
Generated 2026-08-28 02:58 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 1922-06-30 — 305th most senior of the 1247 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: PEERLESS DITCH (1921-07-12). Immediately behind: CON-HOOSIER EAST HOOSIER DITCH (1929-08-05).
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. | Units | UsesWhat the court said this water may be used for -- irrigation, municipal supply, augmentation and so on. | Case |
|---|---|---|---|---|---|---|---|
| 30184.26478 | 1922-06-30 | 1937-10-26 | 4.0 | 0.0 | C | IRRRECFISFIRDOMSTKAUG | 238 |
Legal record & documents
7 decreed actions on record across
5 court cases:
CA2371, 06CW0253, W0012, CA1805, CA1709.
Every case, dated
| Case | Actions | Latest adjudication | Types |
|---|---|---|---|
CA2371 | 1 | 1972-05-31 | S |
06CW0253 | 3 | 1972-05-31 | S |
W0012 | 1 | 1952-03-10 | S |
CA1805 | 1 | 1952-03-10 | S |
CA1709 | 1 | 1937-10-26 | 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 209 AF. Its most recent year on record, 2024, came in at 444 AF — 212% of that, and 15th 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) |
|---|---|---|---|---|
| 2007 | 22 | 2nd lowest of 15 · 10% of median | 114 | 0.2 |
| 2008 | 97 | 3rd lowest of 15 · 46% of median | 72 | 3.2 |
| 2009 | 108 | 4th lowest of 15 · 52% of median | 143 | 2.2 |
| 2010 | 152 | 5th lowest of 15 · 73% of median | 148 | 2.7 |
| 2012 | 3 | 1st lowest of 15 · 1% of median | 4 | 0.9 |
| 2014 | 230 | 11th lowest of 15 · 110% of median | 67 | 4.0 |
| 2015 | 157 | 6th lowest of 15 · 75% of median | 75 | 2.0 |
| 2016 | 165 | 7th lowest of 15 · 79% of median | 69 | 1.9 |
| 2017 | 217 | 10th lowest of 15 · 104% of median | 86 | 2.3 |
| 2018 | 278 | 14th lowest of 15 · 133% of median | 98 | 3.8 |
| 2019 | 230 | 11th lowest of 15 · 110% of median | 116 | 2.3 |
| 2020 | 211 | 9th lowest of 15 · 101% of median | 79 | 2.7 |
| 2021 | 234 | 13th lowest of 15 · 112% of median | 189 | 2.3 |
| 2022 | 209 | 8th lowest of 15 · 100% of median | 215 | 2.2 |
| 2024 | 444 | 15th lowest of 15 · 212% of median | 120 | 3.9 |
Trends for this structure
Recorded use is rising over its last 15 recorded years (+13 AF/yr, Mann-Kendall p=0.001).
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 | 1 right(s), seniority decoded |
| diversion record | present | 4648 measured days; currency unknown (no data-coverage date to compare against) |
| record continuity | sparse | 36% of the irrigation seasons in 1964-2024 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.