Hydrohistorian
← My Water · Print / save as PDF
SCHALLES DITCH
Structure dossier · WDID 3200662 · 1 · ALKALI CANYON · DWR record
Where this page's figures come from
Generated 2026-08-28 01:25 by Hydrohistorian. Sources: DWR HydroBase snapshot HydroBase_CO_20260707 (history) + CDSS REST (current), USGS NWIS cross-checks. Engine v0.5.0 (f6d7fdc) — 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 1893-01-01 — 136th most senior of the 638 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: MURRAY-ZWICKER-TOZER D (1892-06-15). Immediately behind: SCHALLES PUMP (1893-01-01).
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 |
|---|---|---|---|---|---|---|---|
| 15707.0 | 1893-01-01 | 1962-08-14 | 4.0 | 0.0 | C | IRRDOMSTK | 62-14 |
Legal record & documents
3 decreed actions on record across
2 court cases:
CA1077, 06CW0004.
Every case, dated
| Case | Actions | Latest adjudication | Types |
|---|---|---|---|
CA1077 | 2 | 1962-08-14 | O |
06CW0004 | 1 | 1962-08-14 | 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 496 AF. Its most recent year on record, 2025, came in at 296 AF — 60% of that, and 4th 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 | 914 | 15th lowest of 15 · 184% of median | 518 | 153 | 3.4 |
| 2012 | 848 | 14th lowest of 15 · 171% of median | 422 | 195 | 3.0 |
| 2013 | 500 | 9th lowest of 15 · 101% of median | 202 | 152 | 2.3 |
| 2014 | 421 | 7th lowest of 15 · 85% of median | 101 | 138 | 4.0 |
| 2015 | 631 | 13th lowest of 15 · 127% of median | 397 | 153 | 2.5 |
| 2016 | 577 | 12th lowest of 15 · 116% of median | 326 | 142 | 2.6 |
| 2017 | 496 | 8th lowest of 15 · 100% of median | 127 | 159 | 2.3 |
| 2018 | 500 | 9th lowest of 15 · 101% of median | 87 | 139 | 3.3 |
| 2019 | 501 | 11th lowest of 15 · 101% of median | 65 | 137 | 2.9 |
| 2020 | 357 | 5th lowest of 15 · 72% of median | 3 | 140 | 2.3 |
| 2021 | 270 | 2nd lowest of 15 · 54% of median | 15 | 136 | 2.5 |
| 2022 | 236 | 1st lowest of 15 · 48% of median | 0 | 139 | 1.9 |
| 2023 | 363 | 6th lowest of 15 · 73% of median | 0 | 146 | 1.9 |
| 2024 | 295 | 3rd lowest of 15 · 60% of median | 0 | 136 | 1.5 |
| 2025 | 296 | 4th lowest of 15 · 60% of median | 0 | 152 | 1.5 |
Trends for this structure
Recorded use is falling over its last 15 recorded years (-37 AF/yr, Mann-Kendall p=0.001).
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 | 1 right(s), seniority decoded |
| diversion record | present | 7472 measured days; currency unknown (no data-coverage date to compare against) |
| record continuity | patchy | 56% of the irrigation seasons in 1963-2025 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.