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TARRYALL CREEK AT US 285 NEAR COMO
Structure dossier · WDID 2302906 · STREAM GAGE · TARRYALL CREEK · DWR record
Where this page's figures come from
Generated 2026-08-28 02:12 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 1876-04-05 — 515th 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: 2302433 (1876-04-05). Immediately behind: 2302923 (1876-04-05).
Decreed rights (12)
| 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 |
|---|---|---|---|---|---|---|---|
| 9592.0 | 1876-04-05 | 1889-10-18 | 3.66 | 0.0 | C | IRRMUNCOMINDRECFISFIRDOMAUGWLD | |
| 10367.0 | 1878-05-20 | 1889-10-18 | 4.97 | 0.0 | C | IRRMUNCOMINDRECFISAUGOTH | |
| 10722.0 | 1879-05-10 | 1889-10-18 | 5.26 | 0.0 | C | IRRMUNCOMINDRECFISFIRDOMAUGOTH | |
| 11068.0 | 1880-04-20 | 1889-10-18 | 196.0 | 0.0 | A | IRRMUNCOMINDRECFISFIRDOMAUGCUR | |
| 11068.0 | 1880-04-20 | 1889-10-18 | 1.9 | 0.0 | C | IRRMUNCOMINDRECFISFIRDOMAUGCUR | |
| 11098.0 | 1880-05-20 | 1889-10-18 | 2.16 | 0.0 | C | IRRMUNCOMINDRECFISAUGOTH | |
| 11129.0 | 1880-06-20 | 1889-10-18 | 2.0 | 0.0 | C | MUNAUGALL | |
| 11453.0 | 1881-05-10 | 1889-10-18 | 1.8 | 0.0 | C | IRRMUNCOMINDRECFISFIRDOMAUGCUR | |
| 11453.0 | 1881-05-10 | 1889-10-18 | 140.0 | 0.0 | A | IRRMUNCOMINDRECFISFIRDOMAUGCUR | |
| 11550.0 | 1881-08-15 | 1889-10-18 | 1.43 | 0.0 | C | IRRMUNCOMINDRECFISFIRDOMAUGWLD | |
| 12924.0 | 1885-05-20 | 1889-10-18 | 2.6 | 0.0 | C | MUNAUGALL | |
| 14536.14427 | 1889-07-01 | 1896-05-28 | 5.7 | 0.0 | C | MUNAUGALL |
Legal record & documents
18 decreed actions on record across
6 court cases:
88CW0262, W7936, 88CW0263, 88CW0228, 86CW0223, 84CW0065.
Every case, dated
| Case | Actions | Latest adjudication | Types |
|---|---|---|---|
88CW0262 | 2 | 1896-05-28 | S |
W7936 | 2 | 1889-10-18 | O |
88CW0263 | 4 | 1889-10-18 | O |
88CW0228 | 4 | 1889-10-18 | O |
86CW0223 | 4 | 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 1,953 AF. Its most recent year on record, 2025, came in at 2,679 AF — 137% of that, and 12th lowest of the 15 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) |
|---|---|---|---|---|---|
| 2011 | 1,601 | 6th lowest of 15 · 82% of median | 1,601 | 116 | 28.8 |
| 2012 | 178 | 1st lowest of 15 · 9% of median | 178 | 74 | 5.5 |
| 2013 | 1,693 | 7th lowest of 15 · 87% of median | 1,693 | 145 | 23.1 |
| 2014 | 3,407 | 14th lowest of 15 · 174% of median | 3,407 | 184 | 28.8 |
| 2015 | 3,531 | 15th lowest of 15 · 181% of median | 3,531 | 184 | 28.8 |
| 2016 | 1,062 | 2nd lowest of 15 · 54% of median | 1,062 | 117 | 28.8 |
| 2017 | 2,188 | 11th lowest of 15 · 112% of median | 2,188 | 170 | 28.8 |
| 2018 | 1,081 | 4th lowest of 15 · 55% of median | 1,081 | 77 | 22.0 |
| 2019 | 1,574 | 5th lowest of 15 · 81% of median | 1,574 | 139 | 19.7 |
| 2020 | 2,079 | 9th lowest of 15 · 106% of median | 2,079 | 123 | 28.8 |
| 2021 | 1,953 | 8th lowest of 15 · 100% of median | 1,953 | 146 | 28.8 |
| 2022 | 1,079 | 3rd lowest of 15 · 55% of median | 1,079 | 139 | 16.2 |
| 2023 | 2,164 | 10th lowest of 15 · 111% of median | 2,164 | 175 | 21.8 |
| 2024 | 2,679 | 12th lowest of 15 · 137% of median | 2,679 | 151 | 28.8 |
| 2025 | 2,679 | 12th lowest of 15 · 137% of median | 2,679 | 151 | 28.8 |
Trends for this structure
Recorded use shows no clear trend over its last 15 recorded years — which is itself worth knowing.
How good is our record of it?
Grade B (8/10 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 | 12 right(s), seniority decoded |
| diversion record | present | 4838 measured days; currency unknown (no data-coverage date to compare against) |
| record continuity | patchy | 55% of the irrigation seasons in 1984-2025 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.