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TARRYALL RANCH RES 1 & 2
Structure dossier · WDID 2303978 · RESERVOIR · TARRYALL CREEK · DWR record
Where this page's figures come from
Generated 2026-08-27 23:11 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 — 232nd 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: 2303962 (1867-07-01). Immediately behind: 2304009 (1867-07-01).
Decreed rights (7)
| 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 | 10.08 | 0.0 | A | AUG | |
| 10367.0 | 1878-05-20 | 1889-10-18 | 0.0 | 0.0 | C | IRRMUNCOMINDRECFISAUGOTH | |
| 11098.0 | 1880-05-20 | 1889-10-18 | 54.9 | 0.0 | A | IRRMUNCOMINDRECFISAUGOTH | |
| 11098.0 | 1880-05-20 | 1889-10-18 | 0.0 | 0.0 | C | IRRMUNCOMINDRECFISAUGOTH | |
| 27027.0 | 1923-12-31 | 1953-03-24 | 33.65 | 0.0 | A | IRR | |
| 29219.0 | 1929-12-31 | 1953-03-24 | 33.65 | 0.0 | A | IRR | |
| 32506.0 | 1938-12-31 | 1953-03-24 | 32.93 | 0.0 | A | IRR |
Legal record & documents
9 decreed actions on record across
5 court cases:
CA3286, W8107, W7903, W7389, 84CW0065.
Every case, dated
| Case | Actions | Latest adjudication | Types |
|---|---|---|---|
CA3286 | 3 | 1953-03-24 | S |
W8107 | 2 | 1889-10-18 | O |
W7903 | 1 | 1889-10-18 | O |
W7389 | 1 | 1889-10-18 | O |
84CW0065 | 2 | 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 15 years on record)
In a median year this structure has a recorded diversion of 24 AF. Its most recent year on record, 2005, came in at 60 AF — 250% of that, and 8th 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) |
|---|---|---|---|---|---|
| 1987 | 24 | 5th lowest of 9 · 100% of median | — | 7 | 2.0 |
| 1988 | 5 | 2nd lowest of 9 · 21% of median | 6 | 6 | 0.5 |
| 1989 | 4 | 1st lowest of 9 · 17% of median | 1 | 11 | 0.2 |
| 1990 | — | no recorded volume | 1 | 0 | — |
| 1993 | 52 | 7th lowest of 9 · 217% of median | 2 | 33 | 2.0 |
| 1994 | 42 | 6th lowest of 9 · 175% of median | 7 | 23 | 2.0 |
| 1995 | 14 | 4th lowest of 9 · 58% of median | 7 | 7 | 2.0 |
| 1996 | 7 | 3rd lowest of 9 · 29% of median | 3 | 8 | 0.5 |
| 1998 | — | no recorded volume | 3 | 0 | — |
| 1999 | — | no recorded volume | 2 | 0 | — |
| 2000 | — | no recorded volume | 6 | 0 | — |
| 2001 | — | no recorded volume | 8 | 0 | — |
| 2002 | — | no recorded volume | 29 | 0 | — |
| 2004 | 147 | 9th lowest of 9 · 612% of median | 10 | 17 | 5.0 |
| 2005 | 60 | 8th lowest of 9 · 250% of median | 16 | 79 | 1.0 |
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 | 7 right(s), seniority decoded |
| diversion record | present | 246 measured days; currency unknown (no data-coverage date to compare against) |
| record continuity | sparse | 5% of the irrigation seasons in 1981-2005 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.