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WESTERN MUTUAL DITCH
Structure dossier · WDID 0200825 · DITCH · SOUTH PLATTE RIVER · DWR record
Where this page's figures come from
Generated 2026-08-28 02:54 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 LOWER LATHAM DITCH (SOUTH PLATTE RIVER, priority 1877-11-14).
● Junior rights called out — call at HARMONY DITCH 1 (SOUTH PLATTE RIVER, priority 1897-05-02).
● Junior rights called out — call at SOUTH PLATTE RIVER COMPACT (SOUTH PLATTE RIVER, priority 1897-06-13).
● Junior rights called out — call at LOWER PLATTE BEAVER D (SOUTH PLATTE RIVER, priority 1888-04-14).
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 1866-05-05 — 140th 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: MEADOW ISLAND 2 DITCH (1866-05-03). Immediately behind: 0801278 (1866-05-31).
Decreed rights (8)
| 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 |
|---|---|---|---|---|---|---|---|
| 5969.0 | 1866-05-05 | 1883-04-28 | 26.893 | 0.0 | C | IRRMUNAUGCUR | |
| 7892.0 | 1871-08-10 | 1883-04-28 | 69.877 | 0.0 | C | IRRMUNAUGCUR | |
| 16097.0 | 1894-01-26 | 1918-08-02 | 86.43 | 0.0 | C | IRRMUNAUGCUR | |
| 50114.0 | 1987-03-17 | 1987-12-31 | 59.13 | 15.87 | C | AUGRCH | |
| 56977.0 | 2005-12-30 | 2005-12-31 | 0.0 | 25000.0 | A | AUGCURRCH | |
| 56977.0 | 2005-12-30 | 2005-12-31 | 0.0 | 130.0 | C | AUGCURRCH | |
| 60750.0 | 2016-04-29 | 2016-12-31 | 0.0 | 370.0 | C | IRRMUNCOMINDRECFISFIRDOMSTKAUG | |
| 60980.0 | 2016-12-15 | 2016-12-31 | 0.0 | 0.0 | C | MUNAUGCURRCH |
Legal record & documents
77 decreed actions on record across
13 court cases:
16CW3195, 16CW3059, 16CW3058, 17CW3165, 05CW0331, 97CW0161, 87CW0304, 18CW3224, 04CW0255, CA54658 and 3 more below.
Every case, dated
| Case | Actions | Latest adjudication | Types |
|---|---|---|---|
16CW3195 | 25 | 2016-12-31 | S |
16CW3059 | 5 | 2016-12-31 | S |
16CW3058 | 1 | 2016-12-31 | S |
17CW3165 | 4 | 2005-12-31 | S |
05CW0331 | 19 | 2005-12-31 | S |
97CW0161 | 1 | 1987-12-31 | S |
87CW0304 | 2 | 1987-12-31 | S |
18CW3224 | 1 | 1987-12-31 | S |
04CW0255 | 1 | 1987-12-31 | S |
CA54658 | 1 | 1918-08-02 | S |
16CW3200 | 12 | 1918-08-02 | O, S |
CA6009 | 2 | 1883-04-28 | O |
02CW0154B | 3 | 1883-04-28 | 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 24,991 AF. Its most recent year on record, 2025, came in at 23,818 AF — 95% of that, and 4th 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 | 95 | 1st lowest of 15 · 0% of median | — | 18 | 3.3 |
| 2012 | 19,522 | 2nd lowest of 15 · 78% of median | — | 315 | 88.4 |
| 2013 | 25,207 | 9th lowest of 15 · 101% of median | — | 243 | 115.7 |
| 2014 | 30,570 | 14th lowest of 15 · 122% of median | — | 266 | 102.0 |
| 2015 | 25,220 | 10th lowest of 15 · 101% of median | — | 270 | 135.0 |
| 2016 | 24,164 | 6th lowest of 15 · 97% of median | — | 288 | 107.0 |
| 2017 | 28,726 | 13th lowest of 15 · 115% of median | — | 222 | 107.0 |
| 2018 | 24,991 | 8th lowest of 15 · 100% of median | — | 239 | 108.0 |
| 2019 | 23,025 | 3rd lowest of 15 · 92% of median | — | 219 | 112.0 |
| 2020 | 24,811 | 7th lowest of 15 · 99% of median | — | 243 | 107.0 |
| 2021 | 28,375 | 12th lowest of 15 · 114% of median | — | 221 | 113.0 |
| 2022 | 27,098 | 11th lowest of 15 · 108% of median | — | 268 | 105.0 |
| 2023 | 23,833 | 5th lowest of 15 · 95% of median | — | 320 | 111.0 |
| 2024 | 31,580 | 15th lowest of 15 · 126% of median | — | 313 | 113.0 |
| 2025 | 23,818 | 4th lowest of 15 · 95% of median | — | 304 | 113.0 |
Call-derived yield: senior right divertible 43.5% of a median season / 25.2% dry-year.
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 A (9/10 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 | 8 right(s), seniority decoded |
| diversion record | present | 14851 measured days; currency unknown (no data-coverage date to compare against) |
| record continuity | continuous | 92% of the irrigation seasons in 1950-2025 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.