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ROBERT MORRISON DITCH
Structure dossier · WDID 3100547 · 1 · LOS PINOS RIVER · DWR record
Where this page's figures come from
Generated 2026-08-28 04:33 by Hydrohistorian. Sources: DWR HydroBase snapshot HydroBase_CO_20260707 (history) + CDSS REST (current), USGS NWIS cross-checks. Engine v0.5.0 (a1c9146) — 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.
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 1890-10-01 — 318th most senior of the 1037 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: CATLIN DITCH (1890-05-01). Immediately behind: BAILEY CANON DITCH (1891-05-01).
Decreed rights (6)
| 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 |
|---|---|---|---|---|---|---|---|
| 14884.0 | 1890-10-01 | 1934-06-12 | 0.375 | 0.0 | C | IRR | P-21 |
| 18536.0 | 1900-10-01 | 1934-06-12 | 39.13 | 0.0 | C | IRR | P-26 |
| 21642.0 | 1909-04-03 | 1934-06-12 | 5.65 | 0.0 | C | IRR | P-34 |
| 21938.0 | 1910-01-24 | 1934-06-12 | 12.61 | 0.0 | C | IRR | P-35 |
| 33237.0 | 1940-12-31 | 1966-03-07 | 49.985 | 0.0 | C | IRR | 65-22 |
| 57708.5754 | 2007-07-16 | 2008-12-31 | 0.78 | 0.0 | C | IRR |
Legal record & documents
27 decreed actions on record across
10 court cases:
16CW3003, 08CW0040, W0650, W0099, CA1248-B, 91CW0065, 91CW0026, 91CW0025, W0098, CA1248.
Every case, dated
| Case | Actions | Latest adjudication | Types |
|---|---|---|---|
16CW3003 | 2 | 2008-12-31 | S |
08CW0040 | 1 | 2008-12-31 | S |
W0650 | 1 | 1966-03-07 | S |
W0099 | 1 | 1966-03-07 | S |
CA1248-B | 3 | 1966-03-07 | S |
91CW0065 | 4 | 1966-03-07 | S |
91CW0026 | 2 | 1966-03-07 | O, S |
91CW0025 | 1 | 1966-03-07 | S |
W0098 | 3 | 1934-06-12 | O |
CA1248 | 9 | 1934-06-12 | 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 25,894 AF. Its most recent year on record, 2025, came in at 24,509 AF — 95% of that, and 5th 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 | 27,856 | 12th lowest of 15 · 108% of median | — | 327 | 105.5 |
| 2012 | 25,842 | 7th lowest of 15 · 100% of median | — | 252 | 101.5 |
| 2013 | 19,208 | 2nd lowest of 15 · 74% of median | — | 215 | 86.6 |
| 2014 | 28,440 | 14th lowest of 15 · 110% of median | — | 311 | 98.3 |
| 2015 | 26,597 | 10th lowest of 15 · 103% of median | — | 293 | 104.0 |
| 2016 | 26,045 | 9th lowest of 15 · 101% of median | — | 300 | 104.0 |
| 2017 | 28,064 | 13th lowest of 15 · 108% of median | — | 278 | 100.2 |
| 2018 | 15,505 | 1st lowest of 15 · 60% of median | — | 249 | 88.1 |
| 2019 | 30,930 | 15th lowest of 15 · 119% of median | — | 365 | 110.0 |
| 2020 | 25,894 | 8th lowest of 15 · 100% of median | — | 335 | 97.1 |
| 2021 | 21,744 | 4th lowest of 15 · 84% of median | — | 365 | 85.6 |
| 2022 | 19,365 | 3rd lowest of 15 · 75% of median | — | 365 | 88.7 |
| 2023 | 27,110 | 11th lowest of 15 · 105% of median | — | 365 | 108.1 |
| 2024 | 25,375 | 6th lowest of 15 · 98% of median | — | 366 | 112.8 |
| 2025 | 24,509 | 5th lowest of 15 · 95% of median | — | 304 | 85.4 |
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 | 6 right(s), seniority decoded |
| diversion record | present | 15482 measured days; currency unknown (no data-coverage date to compare against) |
| record continuity | continuous | 96% 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.