Hydrohistorian
← My Water · Print / save as PDF
JOHN THOMAS DITCH
Structure dossier · WDID 3000580 · 1 · HERMOSA CREEK · DWR record
Where this page's figures come from
Generated 2026-08-27 23:22 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 1874-05-15 — 84th most senior of the 2277 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: DW- 907 (1868-03-02). Immediately behind: DWYER DITCH (1874-06-15).
Decreed rights (5)
| 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 |
|---|---|---|---|---|---|---|---|
| 8901.0 | 1874-05-15 | 1923-11-08 | 0.33 | 0.0 | C | IRR | H-1 |
| 12479.0 | 1884-03-01 | 1923-11-08 | 2.0 | 0.0 | C | IRR | H-16 |
| 30478.0 | 1933-06-12 | 1966-03-21 | 5.0 | 0.0 | C | IRRDOMSTK | 65-33 |
| 45290.0884 | 1874-03-15 | 1974-12-31 | 3.0 | 0.0 | C | IRR | |
| 45290.08901 | 1874-05-15 | 1974-12-31 | 0.1 | 0.0 | C | IRR |
Legal record & documents
5 decreed actions on record across
4 court cases:
W1233, W1217, CA1751-B, CA1751.
Every case, dated
| Case | Actions | Latest adjudication | Types |
|---|---|---|---|
W1233 | 1 | 1974-12-31 | S |
W1217 | 1 | 1974-12-31 | S |
CA1751-B | 1 | 1966-03-21 | S |
CA1751 | 2 | 1923-11-08 | 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 2,315 AF. Its most recent year on record, 2025, came in at 1,730 AF — 75% of that, and 3rd 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 | 3,009 | 11th lowest of 15 · 130% of median | 316 | 9.4 |
| 2012 | 2,911 | 10th lowest of 15 · 126% of median | 268 | 11.2 |
| 2013 | 2,727 | 9th lowest of 15 · 118% of median | 365 | 8.6 |
| 2014 | 3,386 | 13th lowest of 15 · 146% of median | 315 | 9.3 |
| 2015 | 3,367 | 12th lowest of 15 · 145% of median | 296 | 10.6 |
| 2016 | 3,480 | 15th lowest of 15 · 150% of median | 304 | 11.0 |
| 2017 | 3,397 | 14th lowest of 15 · 147% of median | 266 | 9.4 |
| 2018 | 1,720 | 1st lowest of 15 · 74% of median | 203 | 8.5 |
| 2019 | 1,787 | 4th lowest of 15 · 77% of median | 196 | 7.9 |
| 2020 | 2,315 | 8th lowest of 15 · 100% of median | 219 | 7.9 |
| 2021 | 2,183 | 6th lowest of 15 · 94% of median | 262 | 9.5 |
| 2022 | 2,202 | 7th lowest of 15 · 95% of median | 258 | 8.6 |
| 2023 | 1,728 | 2nd lowest of 15 · 75% of median | 332 | 6.0 |
| 2024 | 2,080 | 5th lowest of 15 · 90% of median | 218 | 7.9 |
| 2025 | 1,730 | 3rd lowest of 15 · 75% of median | 208 | 6.4 |
Trends for this structure
Recorded use is falling over its last 15 recorded years (-91 AF/yr, Mann-Kendall p=0.029).
How good is our record of it?
Grade A (9/10 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 | 5 right(s), seniority decoded |
| diversion record | present | 22828 measured days; currency unknown (no data-coverage date to compare against) |
| record continuity | continuous | 100% of the irrigation seasons in 1925-2025 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.