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LONGMONT SUPPLY DITCH
Structure dossier · WDID 0500545 · 1 · SAINT VRAIN CREEK · DWR record
Where this page's figures come from
Generated 2026-08-28 00:07 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 1862-04-15 — 33rd most senior of the 1289 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: JAMES DITCH (1862-04-15). Immediately behind: DENIO TAYLOR DITCH (1862-04-15).
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 |
|---|---|---|---|---|---|---|---|
| 4488.0 | 1862-04-15 | 1882-06-02 | 0.0 | 0.0 | C | IRRMUNCOMINDRECFISFIRDOMAUGPWR | |
| 4518.0 | 1862-05-15 | 1882-06-02 | 0.0 | 0.0 | C | IRRMUNCOMINDRECFISFIRDOMAUGPWR | |
| 4657.0 | 1862-10-01 | 1882-06-02 | 0.0 | 0.0 | C | IRRMUNCOMINDRECFISFIRDOMAUGPWR | |
| 4853.0 | 1863-04-15 | 1882-06-02 | 0.0 | 0.0 | C | IRRMUNCOMINDRECFISFIRDOMAUGPWR | |
| 5600.0 | 1865-05-01 | 1882-06-02 | 50.5114 | 0.0 | C | IRRMUNCOMINDRECFISDOMAUGPWRWLD |
Legal record & documents
15 decreed actions on record across
8 court cases:
CA8831, CA1383, 90CW0136, 87CW0212, 86CW0390, 85CW0229, 02CW0334, 01CW0188.
Every case, dated
| Case | Actions | Latest adjudication | Types |
|---|---|---|---|
CA8831 | 1 | 1882-06-02 | O |
CA1383 | 1 | 1882-06-02 | O |
90CW0136 | 1 | 1882-06-02 | O |
87CW0212 | 2 | 1882-06-02 | O |
86CW0390 | 2 | 1882-06-02 | O |
85CW0229 | 2 | 1882-06-02 | O |
02CW0334 | 2 | 1882-06-02 | O |
01CW0188 | 4 | 1882-06-02 | 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 2,902 AF. Its most recent year on record, 2024, came in at 3,069 AF — 106% of that, and 12th 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) |
|---|---|---|---|---|---|
| 2010 | 2,069 | 1st lowest of 15 · 71% of median | 2,256 | 122 | 16.7 |
| 2011 | 3,597 | 15th lowest of 15 · 124% of median | — | 198 | 17.4 |
| 2012 | 3,568 | 14th lowest of 15 · 123% of median | — | 207 | 16.1 |
| 2013 | 2,704 | 4th lowest of 15 · 93% of median | — | 123 | 18.2 |
| 2014 | 2,925 | 10th lowest of 15 · 101% of median | — | 176 | 16.4 |
| 2015 | 2,310 | 2nd lowest of 15 · 80% of median | — | 175 | 14.2 |
| 2016 | 2,858 | 7th lowest of 15 · 98% of median | — | 165 | 16.6 |
| 2017 | 2,748 | 5th lowest of 15 · 95% of median | — | 164 | 14.5 |
| 2018 | 2,519 | 3rd lowest of 15 · 87% of median | — | 156 | 14.5 |
| 2019 | 2,834 | 6th lowest of 15 · 98% of median | — | 165 | 15.2 |
| 2020 | 2,918 | 9th lowest of 15 · 101% of median | — | 154 | 16.3 |
| 2021 | 2,902 | 8th lowest of 15 · 100% of median | — | 159 | 19.5 |
| 2022 | 3,107 | 13th lowest of 15 · 107% of median | — | 161 | 21.3 |
| 2023 | 2,953 | 11th lowest of 15 · 102% of median | — | 169 | 17.9 |
| 2024 | 3,069 | 12th lowest of 15 · 106% of median | — | 168 | 14.4 |
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 | 5 right(s), seniority decoded |
| diversion record | present | 10925 measured days; currency unknown (no data-coverage date to compare against) |
| record continuity | patchy | 68% of the irrigation seasons in 1950-2024 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.