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ORNO DITCH
Structure dossier · WDID 5700576 · 1 · TROUT CREEK · DWR record
Where this page's figures come from
Generated 2026-08-28 05:25 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 1888-05-11 — 30th most senior of the 1003 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: DAVID M CHAPMAN DITCH 2 (1888-05-11). Immediately behind: WILLIAM H JONES DITCH (1888-05-12).
Decreed rights (4)
| 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 |
|---|---|---|---|---|---|---|---|
| 14011.0 | 1888-05-11 | 1892-09-22 | 1.83 | 0.0 | C | IRR | 28 |
| 23544.21352 | 1908-06-17 | 1914-06-19 | 0.58 | 0.0 | C | IRR | 83B |
| 39925.35198 | 1946-05-15 | 1962-11-15 | 3.6 | 0.0 | C | IRR | A-13 |
| 52960.34333 | 1944-01-01 | 1995-12-31 | 2.3 | 0.0 | C | IRRSTK |
Legal record & documents
4 decreed actions on record across
4 court cases:
95CW0064, CA3081, 06/19/1914, 09/22/1892.
Every case, dated
| Case | Actions | Latest adjudication | Types |
|---|---|---|---|
95CW0064 | 1 | 1995-12-31 | S |
CA3081 | 1 | 1962-11-15 | S |
06/19/1914 | 1 | 1914-06-19 | S |
09/22/1892 | 1 | 1892-09-22 | 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 549 AF. Its most recent year on record, 2025, came in at 474 AF — 86% of that, and 5th lowest of the 15 years with a recorded volume.
| 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 | Days recorded | Peak (cfs) |
|---|---|---|---|---|
| 2011 | 507 | 6th lowest of 15 · 92% of median | 47 | 6.7 |
| 2012 | 1,195 | 15th lowest of 15 · 218% of median | 130 | 10.2 |
| 2013 | 233 | 1st lowest of 15 · 42% of median | 71 | 7.1 |
| 2014 | 674 | 10th lowest of 15 · 123% of median | 72 | 9.1 |
| 2015 | 292 | 3rd lowest of 15 · 53% of median | 46 | 4.6 |
| 2016 | 1,016 | 14th lowest of 15 · 185% of median | 86 | 7.6 |
| 2017 | 785 | 13th lowest of 15 · 143% of median | 93 | 9.1 |
| 2018 | 536 | 7th lowest of 15 · 98% of median | 117 | 7.3 |
| 2019 | 264 | 2nd lowest of 15 · 48% of median | 37 | 5.6 |
| 2020 | 606 | 9th lowest of 15 · 110% of median | 65 | 6.9 |
| 2021 | 759 | 12th lowest of 15 · 138% of median | 71 | 7.6 |
| 2022 | 444 | 4th lowest of 15 · 81% of median | 76 | 4.5 |
| 2023 | 549 | 8th lowest of 15 · 100% of median | 58 | 7.8 |
| 2024 | 739 | 11th lowest of 15 · 135% of median | 51 | 9.5 |
| 2025 | 474 | 5th lowest of 15 · 86% of median | 51 | 6.1 |
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 (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 | 4 right(s), seniority decoded |
| diversion record | present | 7326 measured days; currency unknown (no data-coverage date to compare against) |
| record continuity | sparse | 37% of the irrigation seasons in 1934-2025 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.