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ELEVEN MILE RES
Structure dossier · WDID 2303965 · RESERVOIR · SOUTH PLATTE RIVER · DWR record
Where this page's figures come from
Generated 2026-08-27 23:06 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).
● Junior rights called out — call at NEVADA DITCH (SOUTH PLATTE RIVER, priority 1865-12-30).
● Junior rights called out — call at LOWER LATHAM DITCH (SOUTH PLATTE RIVER, priority 1877-11-14).
● Junior rights called out — call at WESTERN MUTUAL DITCH (SOUTH PLATTE RIVER, priority 1871-08-09).
● Junior rights called out — call at HARMONY DITCH 1 (SOUTH PLATTE RIVER, priority 1897-05-02).
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 — 18th 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: 2303904 (1860-12-28). Immediately behind: 8003550 (1860-12-28).
Decreed rights (13)
| 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 | C | IRRMUN | |
| 4015.0 | 1860-12-28 | 1883-12-10 | 0.0 | 0.0 | A | IRRMUN | |
| 11032.0 | 1880-03-15 | 1889-10-18 | 0.0 | 0.0 | C | MUNALL | |
| 11129.0 | 1880-06-20 | 1889-10-18 | 0.0 | 0.0 | C | MUNALL | |
| 11809.0 | 1882-05-01 | 1889-10-18 | 0.0 | 0.0 | C | MUNALL | |
| 12924.0 | 1885-05-20 | 1889-10-18 | 0.0 | 0.0 | C | MUNALL | |
| 14536.12936 | 1885-06-01 | 1913-05-22 | 0.0 | 0.0 | C | MUNALL | |
| 14536.14427 | 1889-07-01 | 1896-05-28 | 0.0 | 0.0 | C | MUNALL | |
| 16718.0 | 1895-10-09 | 1913-05-22 | 0.0 | 0.0 | C | MUNALL | |
| 27949.0 | 1926-07-10 | 1953-03-24 | 81917.0 | 0.0 | A | IRRMUNFIRDOM | |
| 29219.0 | 1929-12-31 | 1953-03-24 | 81917.0 | 0.0 | A | IRRMUNFIRDOM | |
| 39361.0 | 1957-10-07 | 1972-04-27 | 15862.0 | 0.0 | A | MUNINDDOMPWR | |
| 39424.0 | 1957-12-09 | 1972-04-27 | 0.0 | 17810.1 | A | MUNINDDOMPWR |
Legal record & documents
32 decreed actions on record across
12 court cases:
CA3701, 83CW0280, CA3286, 88CW0263, 88CW0262, W9242-78B, W9242-78A, W8345, W7739, 80CW0313 and 2 more below.
Every case, dated
| Case | Actions | Latest adjudication | Types |
|---|---|---|---|
CA3701 | 2 | 1972-04-27 | S |
83CW0280 | 1 | 1971-12-31 | O |
CA3286 | 3 | 1953-03-24 | S |
88CW0263 | 4 | 1913-05-22 | O, S |
88CW0262 | 3 | 1913-05-22 | O, S |
W9242-78B | 7 | 1889-10-18 | O |
W9242-78A | 3 | 1889-10-18 | O |
W8345 | 4 | 1889-10-18 | O |
W7739 | 1 | 1889-10-18 | O |
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 10,952 AF. Its most recent year on record, 2025, came in at 1,546 AF — 14% of that, and 1st 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 | 12,184 | 11th lowest of 15 · 111% of median | 11,910 | 176 | 176.0 |
| 2012 | 3,798 | 2nd lowest of 15 · 35% of median | 4,484 | 154 | 170.0 |
| 2013 | 8,391 | 6th lowest of 15 · 77% of median | 8,833 | 123 | 241.0 |
| 2014 | 11,688 | 9th lowest of 15 · 107% of median | 12,202 | 200 | 192.5 |
| 2015 | 31,361 | 15th lowest of 15 · 286% of median | 26,202 | 224 | 417.9 |
| 2016 | 6,366 | 4th lowest of 15 · 58% of median | 6,731 | 211 | 207.0 |
| 2017 | 11,698 | 10th lowest of 15 · 107% of median | 11,421 | 263 | 347.5 |
| 2018 | 8,897 | 7th lowest of 15 · 81% of median | 9,365 | 246 | 139.0 |
| 2019 | 14,499 | 14th lowest of 15 · 132% of median | 14,162 | 237 | 314.1 |
| 2020 | 10,952 | 8th lowest of 15 · 100% of median | 14,319 | 211 | 139.0 |
| 2021 | 12,384 | 12th lowest of 15 · 113% of median | 9,925 | 201 | 138.7 |
| 2022 | 8,183 | 5th lowest of 15 · 75% of median | 7,325 | 164 | 138.9 |
| 2023 | 4,874 | 3rd lowest of 15 · 44% of median | 5,561 | 166 | 142.8 |
| 2024 | 12,508 | 13th lowest of 15 · 114% of median | 12,130 | 194 | 450.0 |
| 2025 | 1,546 | 1st lowest of 15 · 14% of median | 1,498 | 126 | 17.0 |
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 | 13 right(s), seniority decoded |
| diversion record | present | 8744 measured days; currency unknown (no data-coverage date to compare against) |
| record continuity | patchy | 56% of the irrigation seasons in 1952-2025 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.