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ASSMAN DITCH NO 1
Structure dossier · WDID 5400501 · 1 · SOUTH FORK LITTLE SNAKE · DWR record
Where this page's figures come from
Generated 2026-08-27 22:45 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 1898-06-01 — 122nd most senior of the 724 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: CO ZIZ PUMP SITE (1895-05-27). Immediately behind: ASSMAN DITCH NO 2 (1903-10-15).
Decreed rights (1)
| 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 |
|---|---|---|---|---|---|---|---|
| 22076.17684 | 1898-06-01 | 1910-09-24 | 0.83 | 0.0 | C | IRR | 26AB |
Legal record & documents
3 decreed actions on record across
2 court cases:
CA0665, 84CW0071.
Every case, dated
| Case | Actions | Latest adjudication | Types |
|---|---|---|---|
CA0665 | 2 | 1910-09-24 | S |
84CW0071 | 1 | 1910-09-24 | S |
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 79 AF. Its most recent year on record, 2020, 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) |
|---|---|---|---|---|
| 1951 | 623 | 15th lowest of 15 · 789% of median | 41 | 8.0 |
| 1954 | 438 | 14th lowest of 15 · 554% of median | 99 | 10.0 |
| 1956 | 48 | 6th lowest of 15 · 61% of median | 25 | 1.0 |
| 1980 | 190 | 13th lowest of 15 · 240% of median | 97 | 1.0 |
| 2007 | 104 | 11th lowest of 15 · 132% of median | 139 | 0.6 |
| 2008 | 75 | 7th lowest of 15 · 95% of median | 61 | 0.6 |
| 2009 | 162 | 12th lowest of 15 · 205% of median | 93 | 2.0 |
| 2012 | 82 | 9th lowest of 15 · 104% of median | 84 | 0.5 |
| 2013 | 86 | 10th lowest of 15 · 109% of median | 88 | 0.5 |
| 2014 | 79 | 8th lowest of 15 · 100% of median | 78 | 0.8 |
| 2016 | 0 | 1st lowest of 15 · 0% of median | 1 | 0.0 |
| 2017 | 0 | 1st lowest of 15 · 0% of median | 1 | 0.0 |
| 2018 | 0 | 1st lowest of 15 · 0% of median | 1 | 0.0 |
| 2019 | 0 | 1st lowest of 15 · 0% of median | 1 | 0.0 |
| 2020 | 0 | 1st lowest of 15 · 0% of median | 1 | 0.0 |
Trends for this structure
Recorded use is falling over its last 15 recorded years (-7 AF/yr, Mann-Kendall p=0.001).
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 | 1 right(s), seniority decoded |
| diversion record | present | 1305 measured days; currency unknown (no data-coverage date to compare against) |
| record continuity | sparse | 7% of the irrigation seasons in 1937-2020 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.