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RAHN DITCH (MEDINA NO2)
Structure dossier · WDID 7900590 · 1 · HUERFANO RIVER · DWR record
Where this page's figures come from
Generated 2026-08-27 23:09 by Hydrohistorian. Sources: DWR HydroBase snapshot HydroBase_CO_20260707 (history) + CDSS REST (current), USGS NWIS cross-checks. Engine v0.5.0 (2deb1d7) — 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 1867-06-01 — 24th most senior of the 930 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: MEDINA DITCH NO 3 (1867-06-01). Immediately behind: SANCHEZ DITCH (1867-07-15).
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 |
|---|---|---|---|---|---|---|---|
| 6361.0 | 1867-06-01 | 1889-06-12 | 2.6666 | 0.0 | C | IRR | 23 |
| 8932.0 | 1874-06-15 | 1889-06-12 | 0.5 | 0.0 | C | IRR | 54 |
| 19113.0 | 1902-05-01 | 1921-10-03 | 1.0 | 0.0 | C | IRR | 313 |
| 20575.0 | 1906-05-02 | 1921-10-03 | 7.0 | 0.0 | C | IRR | 357 |
Legal record & documents
4 decreed actions on record across
2 court cases:
CA1414, CA1645.
Every case, dated
| Case | Actions | Latest adjudication | Types |
|---|---|---|---|
CA1414 | 2 | 1921-10-03 | S |
CA1645 | 2 | 1889-06-12 | 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 260 AF. Its most recent year on record, 2025, came in at 0 AF — 0% of that, and 1st 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 | 20 | 5th lowest of 15 · 8% of median | 39 | 2.0 |
| 2012 | 0 | 1st lowest of 15 · 0% of median | 34 | 0.0 |
| 2013 | 129 | 6th lowest of 15 · 50% of median | 36 | 2.9 |
| 2014 | 377 | 9th lowest of 15 · 145% of median | 90 | 4.0 |
| 2015 | 780 | 15th lowest of 15 · 300% of median | 129 | 8.0 |
| 2016 | 658 | 14th lowest of 15 · 253% of median | 173 | 4.0 |
| 2017 | 633 | 12th lowest of 15 · 244% of median | 166 | 4.7 |
| 2018 | 0 | 1st lowest of 15 · 0% of median | 34 | 0.0 |
| 2019 | 14 | 4th lowest of 15 · 5% of median | 46 | 2.0 |
| 2020 | 187 | 7th lowest of 15 · 72% of median | 71 | 2.7 |
| 2021 | 634 | 13th lowest of 15 · 244% of median | 136 | 3.5 |
| 2022 | 441 | 11th lowest of 15 · 170% of median | 106 | 3.3 |
| 2023 | 260 | 8th lowest of 15 · 100% of median | 62 | 6.0 |
| 2024 | 405 | 10th lowest of 15 · 156% of median | 81 | 3.0 |
| 2025 | 0 | 1st lowest of 15 · 0% of median | 12 | 0.0 |
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 (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 | 2779 measured days; currency unknown (no data-coverage date to compare against) |
| record continuity | sparse | 13% of the irrigation seasons in 1924-2025 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.