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RIDGES BASIN RESERVOIR
Structure dossier · WDID 3003623 · 3 · BASIN CREEK · DWR record
Where this page's figures come from
Generated 2026-08-28 00:42 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 1938-09-02 — 511th most senior of the 2277 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: HOWARDSVILLE RESERVOIR (1938-09-02). Immediately behind: NEW MEXICO STATE LINE ALP DELIVERY POINT (1938-09-02).
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 |
|---|---|---|---|---|---|---|---|
| 32386.0 | 1938-09-02 | 1966-03-21 | 0.0 | 0.0 | A | STOIRRMUNINDRECFISDOMSTKOTHWLD | 65-2, 65-3 |
| 32387.0 | 1938-09-03 | 1966-03-21 | 0.0 | 0.0 | A | IRRMUNINDRECFISDOMSTKOTH | 65-2, 65-3 |
| 46139.0 | 1976-04-28 | 1976-12-31 | 0.0 | 24800.0 | A | MUNINDRECDOM | |
| 57816.0 | 2008-04-17 | 2008-12-31 | 3563.0 | 2837.0 | A | IRRMUNINDRECFISDOMOTH |
Legal record & documents
17 decreed actions on record across
5 court cases:
15CW3030, 08CW0081, W1450, 80CW0237, 13CW3011.
Every case, dated
| Case | Actions | Latest adjudication | Types |
|---|---|---|---|
15CW3030 | 1 | 2008-12-31 | S |
08CW0081 | 2 | 2008-12-31 | S |
W1450 | 1 | 1976-12-31 | S |
80CW0237 | 3 | 1966-03-21 | S |
13CW3011 | 10 | 1966-03-21 | 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 9 years on record)
In a median year this structure has a recorded diversion of 2,423 AF. Its most recent year on record, 2019, came in at 880 AF — 36% of that, and 3rd lowest of the 9 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) |
|---|---|---|---|---|---|
| 2010 | 3,019 | 6th lowest of 9 · 125% of median | — | 38 | 63.8 |
| 2011 | 47,108 | 9th lowest of 9 · 1944% of median | — | 111 | 284.0 |
| 2012 | 0 | 1st lowest of 9 · 0% of median | — | 1 | 0.0 |
| 2013 | 0 | 1st lowest of 9 · 0% of median | — | 2 | 0.0 |
| 2014 | 11,295 | 8th lowest of 9 · 466% of median | — | 63 | 97.0 |
| 2015 | 2,140 | 4th lowest of 9 · 88% of median | — | 153 | 33.2 |
| 2017 | 2,423 | 5th lowest of 9 · 100% of median | 0 | 122 | 32.0 |
| 2018 | 4,387 | 7th lowest of 9 · 181% of median | 38 | 62 | 94.3 |
| 2019 | 880 | 3rd lowest of 9 · 36% of median | 2 | 92 | 32.5 |
Trends for this structure
Recorded use shows no clear trend over its last 9 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 | 4 right(s), seniority decoded |
| diversion record | present | 644 measured days; currency unknown (no data-coverage date to compare against) |
| record continuity | sparse | 33% of the irrigation seasons in 2010-2019 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.