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ANTERO RES
Structure dossier · WDID 2303904 · RESERVOIR · SOUTH FORK SOUTH PLATTE RIVER · DWR record
Where this page's figures come from
Generated 2026-08-27 23:24 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
● Junior rights 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 1860-12-28 — 17th 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: 0801017 (1860-12-28). Immediately behind: 2303965 (1860-12-28).
Decreed rights (5)
| 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 |
|---|---|---|---|---|---|---|---|
| 4015.0 | 1860-12-28 | 1883-12-10 | 0.0 | 0.0 | A | IRRMUN | |
| 4015.0 | 1860-12-28 | 1883-12-10 | 0.0 | 0.0 | C | IRRMUN | |
| 6727.0 | 1868-06-01 | 1889-10-18 | 6.0 | 0.0 | C | STOIRRMUNCOMINDRECFIRDOM | |
| 21099.0 | 1907-10-08 | 1913-05-22 | 85600.0 | 0.0 | A | IRR | |
| 29219.0 | 1929-12-31 | 1953-03-24 | 85600.0 | 0.0 | A | STOIRRMUNCOMINDFIRDOMAUGPWROTH |
Legal record & documents
8 decreed actions on record across
6 court cases:
83CW0280, CA3286, CA1678, 80CW0313, 20CW3200, 20CW3103.
Every case, dated
| Case | Actions | Latest adjudication | Types |
|---|---|---|---|
83CW0280 | 1 | 1971-12-31 | O |
CA3286 | 2 | 1953-03-24 | S |
CA1678 | 1 | 1913-05-22 | S |
80CW0313 | 1 | 1889-10-18 | O |
20CW3200 | 1 | 1883-12-10 | O |
20CW3103 | 2 | 1883-12-10 | 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 983 AF. Its most recent year on record, 2025, came in at 799 AF — 81% of that, and 6th 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) |
|---|---|---|---|---|---|
| 2006 | 9,953 | 12th lowest of 13 · 1012% of median | 276 | 231 | 157.0 |
| 2007 | 3,305 | 9th lowest of 13 · 336% of median | 173 | 94 | 162.0 |
| 2011 | 224 | 4th lowest of 13 · 23% of median | 4,360 | 10 | 43.0 |
| 2013 | 1,886 | 8th lowest of 13 · 192% of median | — | 31 | 131.0 |
| 2014 | — | no recorded volume | 3,277 | 0 | — |
| 2015 | 4,005 | 10th lowest of 13 · 407% of median | 18,472 | 80 | 176.0 |
| 2016 | 14,199 | 13th lowest of 13 · 1444% of median | 63 | 192 | 167.0 |
| 2017 | 7,686 | 11th lowest of 13 · 782% of median | 1,764 | 194 | 149.0 |
| 2018 | 201 | 3rd lowest of 13 · 20% of median | 279 | 10 | 26.9 |
| 2019 | 983 | 7th lowest of 13 · 100% of median | 876 | 41 | 67.0 |
| 2020 | — | no recorded volume | 42 | 0 | — |
| 2021 | 42 | 1st lowest of 13 · 4% of median | — | 2 | 21.0 |
| 2023 | 109 | 2nd lowest of 13 · 11% of median | — | 4 | 54.4 |
| 2024 | 669 | 5th lowest of 13 · 68% of median | 2,577 | 36 | 47.0 |
| 2025 | 799 | 6th lowest of 13 · 81% of median | 39 | 58 | 18.0 |
Trends for this structure
Recorded use shows no clear trend over its last 13 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 | 5 right(s), seniority decoded |
| diversion record | present | 3177 measured days; currency unknown (no data-coverage date to compare against) |
| record continuity | sparse | 34% of the irrigation seasons in 1981-2025 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.