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COTTAGE GROVE RES
Structure dossier · WDID 2303331 · RESERVOIR · MIDDLE FORK SOUTH PLATTE RIVER · DWR record
Where this page's figures come from
Generated 2026-08-28 01:25 by Hydrohistorian. Sources: DWR HydroBase snapshot HydroBase_CO_20260707 (history) + CDSS REST (current), USGS NWIS cross-checks. Engine v0.5.0 (0576005) — 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.
Current administration
● Fully called out — call at LAST CHANCE DITCH 2 (SOUTH PLATTE RIVER, priority 1863-12-30).
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 1867-07-01 — 230th most senior of the 21881 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: 2302924 (1867-07-01). Immediately behind: 2303962 (1867-07-01).
Decreed rights (3)
| 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 |
|---|---|---|---|---|---|---|---|
| 6391.0 | 1867-07-01 | 1889-10-18 | 21.82 | 0.0 | A | AUG | |
| 45290.43707 | 1969-08-31 | 1974-12-31 | 4.0 | 0.0 | A | RECFISAUG | |
| 45654.0 | 1974-12-30 | 1974-12-31 | 6.0 | 6.0 | A | RECFISAUG |
Legal record & documents
7 decreed actions on record across
4 court cases:
W7853, 83CW0232, 22CW3186, W7610.
Every case, dated
| Case | Actions | Latest adjudication | Types |
|---|---|---|---|
W7853 | 3 | 1974-12-31 | S |
83CW0232 | 1 | 1974-12-31 | S |
22CW3186 | 2 | 1974-12-31 | S |
W7610 | 1 | 1889-10-18 | O |
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 5 years on record)
In a median year this structure has a recorded diversion of 9 AF. Its most recent year on record, 1998, came in at 1 AF — 11% of that, and 1st lowest of the 4 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) |
|---|---|---|---|---|---|
| 1983 | 48 | 4th lowest of 4 · 533% of median | — | 13 | 2.0 |
| 1985 | 10 | 3rd lowest of 4 · 111% of median | — | 6 | 1.0 |
| 1986 | 8 | 2nd lowest of 4 · 89% of median | — | 5 | 1.0 |
| 1998 | 1 | 1st lowest of 4 · 11% of median | 1 | 4 | 0.2 |
| 2002 | — | no recorded volume | 2 | 0 | — |
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 | 3 right(s), seniority decoded |
| diversion record | fragment | 28 measured day(s) on file (under 180 -- a season, not a history) |
| record continuity | unknown | record too short to assess continuity (needs 2+ years of span and 180+ 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.