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Structure dossier · WDID 2900725 · 1 · WEST FORK SAN JUAN RIVER · DWR record
Where this page's figures come from
Generated 2026-08-27 23:46 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 1910-12-31 — 265th most senior of the 853 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: AT LAST SPRING NO 2 (1910-06-01). Immediately behind: DERMODY PUMP (1910-12-31).
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 |
|---|---|---|---|---|---|---|---|
| 41016.22279 | 1910-12-31 | 1968-12-19 | 2.6 | 0.0 | C | IRRDOMSTK | 68-13 |
Legal record & documents
2 decreed actions on record across
2 court cases:
W1858, CA0308-D.
Every case, dated
| Case | Actions | Latest adjudication | Types |
|---|---|---|---|
W1858 | 1 | 1968-12-19 | S |
CA0308-D | 1 | 1968-12-19 | 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 14 years on record)
In a median year this structure has a recorded diversion of 27 AF. Its most recent year on record, 2005, came in at 0 AF — 0% of that, and 1st lowest of the 13 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) |
|---|---|---|---|---|---|
| 1969 | 84 | 10th lowest of 13 · 311% of median | — | 36 | 1.6 |
| 1970 | 71 | 9th lowest of 13 · 263% of median | — | 36 | 1.6 |
| 1975 | 144 | 12th lowest of 13 · 533% of median | — | 54 | 2.0 |
| 1976 | 254 | 13th lowest of 13 · 941% of median | — | 74 | 3.0 |
| 1977 | 27 | 7th lowest of 13 · 100% of median | — | 58 | 0.5 |
| 1978 | 122 | 11th lowest of 13 · 452% of median | — | 87 | 1.6 |
| 1979 | 39 | 8th lowest of 13 · 144% of median | — | 55 | 1.0 |
| 1980 | 0 | 1st lowest of 13 · 0% of median | — | 34 | 0.0 |
| 1992 | — | no recorded volume | 274 | 0 | — |
| 2001 | 0 | 1st lowest of 13 · 0% of median | — | 2 | 0.0 |
| 2002 | 0 | 1st lowest of 13 · 0% of median | — | 3 | 0.0 |
| 2003 | 0 | 1st lowest of 13 · 0% of median | — | 6 | 0.0 |
| 2004 | 0 | 1st lowest of 13 · 0% of median | — | 6 | 0.0 |
| 2005 | 0 | 1st lowest of 13 · 0% of median | — | 2 | 0.0 |
Trends for this structure
Recorded use is falling over its last 13 recorded years (-2 AF/yr, Mann-Kendall p=0.005).
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 | 453 measured days; currency unknown (no data-coverage date to compare against) |
| record continuity | sparse | 6% of the irrigation seasons in 1969-2005 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.