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WEIR AND JOHNSON DITCH
Structure dossier · WDID 4000786 · 1 · SURFACE CREEK · DWR record
Where this page's figures come from
Generated 2026-08-27 22:16 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 1886-03-15 — 1082nd most senior of the 4661 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: GALLAGHER DITCH (1886-03-01). Immediately behind: LUCKY DITCH NO 1 (1886-04-01).
Decreed rights (6)
| 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 |
|---|---|---|---|---|---|---|---|
| 20501.13223 | 1886-03-15 | 1907-09-28 | 1.5 | 0.0 | C | IRR | 22 |
| 20501.14735 | 1890-05-05 | 1907-09-28 | 0.9 | 0.0 | C | IRR | 28 |
| 20501.15827 | 1893-05-01 | 1907-09-28 | 0.65 | 0.0 | C | IRR | 34 |
| 20501.17288 | 1897-05-01 | 1907-09-28 | 0.65 | 0.0 | C | IRR | 38 |
| 20501.17653 | 1898-05-01 | 1907-09-28 | 0.25 | 0.0 | C | IRR | 39 |
| 29260.2109 | 1907-09-29 | 1937-05-28 | 4.65 | 0.0 | C | IRR | H65 |
Legal record & documents
8 decreed actions on record across
4 court cases:
CA2563, W3487, CA0457, W2643.
Every case, dated
| Case | Actions | Latest adjudication | Types |
|---|---|---|---|
CA2563 | 1 | 1937-05-28 | S |
W3487 | 1 | 1907-09-28 | S |
CA0457 | 5 | 1907-09-28 | S |
W2643 | 1 | 1889-06-17 | 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 182 AF. Its most recent year on record, 2024, came in at 182 AF — 100% of that, and 8th 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) |
|---|---|---|---|---|
| 2009 | 453 | 14th lowest of 15 · 249% of median | 116 | 3.0 |
| 2010 | 253 | 12th lowest of 15 · 139% of median | 89 | 3.0 |
| 2011 | 652 | 15th lowest of 15 · 358% of median | 133 | 4.0 |
| 2012 | 294 | 13th lowest of 15 · 162% of median | 80 | 4.0 |
| 2013 | 185 | 9th lowest of 15 · 102% of median | 67 | 1.8 |
| 2014 | 219 | 11th lowest of 15 · 120% of median | 70 | 2.5 |
| 2015 | 56 | 2nd lowest of 15 · 31% of median | 27 | 1.5 |
| 2016 | 179 | 7th lowest of 15 · 98% of median | 75 | 2.4 |
| 2017 | 134 | 6th lowest of 15 · 74% of median | 60 | 1.6 |
| 2018 | 3 | 1st lowest of 15 · 2% of median | 4 | 1.5 |
| 2019 | 104 | 5th lowest of 15 · 57% of median | 62 | 3.0 |
| 2020 | 90 | 4th lowest of 15 · 50% of median | 35 | 1.6 |
| 2022 | 195 | 10th lowest of 15 · 107% of median | 52 | 2.6 |
| 2023 | 68 | 3rd lowest of 15 · 37% of median | 72 | 2.0 |
| 2024 | 182 | 8th lowest of 15 · 100% of median | 112 | 2.4 |
Trends for this structure
Recorded use is falling over its last 15 recorded years (-17 AF/yr, Mann-Kendall p=0.010).
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 | 6 right(s), seniority decoded |
| diversion record | present | 5052 measured days; currency unknown (no data-coverage date to compare against) |
| record continuity | patchy | 43% of the irrigation seasons in 1970-2024 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.