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ARCH IRRIGATING DITCH
Structure dossier · WDID 2800510 · 1 · TOMICHI CREEK · DWR record
Where this page's figures come from
Generated 2026-08-27 22:05 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 1887-12-31 — 28th most senior of the 1505 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: VADER RAUSIS DITCH (1885-12-31). Immediately behind: HELLMUTH D NOS 1&2 (1887-12-31).
Decreed rights (9)
| 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 |
|---|---|---|---|---|---|---|---|
| 13879.0 | 1887-12-31 | 1894-05-01 | 14.35 | 0.0 | C | IRR | 24 |
| 16192.12785 | 1885-01-01 | 1904-04-29 | 3.0 | 0.0 | C | IRR | 76 |
| 16192.14001 | 1888-05-01 | 1904-04-29 | 4.4 | 0.0 | C | IRR | 95 |
| 19509.0 | 1903-06-01 | 1904-04-29 | 3.6 | 0.0 | C | IRR | 135 |
| 22051.22049 | 1910-05-15 | 1913-05-28 | 1.4 | 0.0 | C | IRR | 142 |
| 22797.0 | 1912-06-01 | 1913-05-28 | 18.0 | 0.0 | C | IRR | 143 |
| 25719.0 | 1920-06-01 | 1921-10-25 | 2.01 | 0.0 | C | IRR | 194 |
| 28311.12936 | 1885-06-01 | 1943-04-19 | 12.0 | 0.0 | C | IRR | 240 |
| 28311.13879 | 1887-12-31 | 1943-04-19 | 88.44 | 0.0 | C | IRR | 253 |
Legal record & documents
40 decreed actions on record across
9 court cases:
CA5007, 84CW0093, CA2079, 05CW0067, CA1673, CA1527, CA1524, CA1266, CA0946.
Every case, dated
| Case | Actions | Latest adjudication | Types |
|---|---|---|---|
CA5007 | 1 | 1946-04-15 | S |
84CW0093 | 7 | 1946-04-15 | S |
CA2079 | 7 | 1943-04-19 | S |
05CW0067 | 18 | 1943-04-19 | O, S |
CA1673 | 1 | 1921-10-25 | S |
CA1527 | 1 | 1913-05-28 | S |
CA1524 | 1 | 1913-05-28 | S |
CA1266 | 3 | 1904-04-29 | S |
CA0946 | 1 | 1894-05-01 | 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 14,348 AF. Its most recent year on record, 2025, came in at 14,297 AF — 100% of that, and 7th 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 | 24,140 | 15th lowest of 15 · 168% of median | 150 | 170.6 |
| 2012 | 2,297 | 1st lowest of 15 · 16% of median | 71 | 58.5 |
| 2013 | 13,451 | 5th lowest of 15 · 94% of median | 151 | 98.8 |
| 2014 | 19,629 | 13th lowest of 15 · 137% of median | 164 | 112.0 |
| 2015 | 19,559 | 12th lowest of 15 · 136% of median | 143 | 140.0 |
| 2016 | 17,300 | 10th lowest of 15 · 121% of median | 139 | 144.0 |
| 2017 | 17,370 | 11th lowest of 15 · 121% of median | 136 | 171.0 |
| 2018 | 10,697 | 2nd lowest of 15 · 75% of median | 173 | 120.0 |
| 2019 | 19,825 | 14th lowest of 15 · 138% of median | 184 | 160.0 |
| 2020 | 15,051 | 9th lowest of 15 · 105% of median | 220 | 130.0 |
| 2021 | 11,049 | 3rd lowest of 15 · 77% of median | 147 | 114.0 |
| 2022 | 11,964 | 4th lowest of 15 · 83% of median | 142 | 120.0 |
| 2023 | 14,348 | 8th lowest of 15 · 100% of median | 120 | 125.2 |
| 2024 | 13,914 | 6th lowest of 15 · 97% of median | 121 | 113.7 |
| 2025 | 14,297 | 7th lowest of 15 · 100% of median | 133 | 119.4 |
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 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 | 9 right(s), seniority decoded |
| diversion record | present | 8290 measured days; currency unknown (no data-coverage date to compare against) |
| record continuity | patchy | 70% of the irrigation seasons in 1970-2025 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.