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JAMES MASON DITCH
Structure dossier · WDID 0500602 · 1 · SAINT VRAIN CREEK · DWR record
Where this page's figures come from
Generated 2026-08-27 19:53 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 in line
Priority 1860-07-31 — 7th 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: RADEMACHER WELL (1860-01-01). Immediately behind: HALDI DITCH (1860-09-01).
Decreed rights (3)
| 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 |
|---|---|---|---|---|---|---|---|
| 3865.0 | 1860-07-31 | 1882-06-02 | 529.5 | 0.0 | A | IRRAUGRCH | |
| 3865.0 | 1860-07-31 | 1882-06-02 | 5.45 | 0.0 | C | IRRAUGRCH | |
| 49079.0 | 1984-05-16 | 1984-12-31 | 0.0 | 5.45 | C | STO |
Recorded use (last 15 years on record)
In a median year this structure has a recorded diversion of 103 AF. Its most recent year on record, 2024, came in at 123 AF — 119% of that, and 9th 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) |
|---|---|---|---|---|
| 2005 | 28 | 2nd lowest of 15 · 27% of median | 21 | 1.0 |
| 2006 | 16 | 1st lowest of 15 · 16% of median | 10 | 1.0 |
| 2007 | 63 | 5th lowest of 15 · 61% of median | 36 | 1.0 |
| 2010 | 355 | 15th lowest of 15 · 345% of median | 70 | 3.0 |
| 2011 | 63 | 5th lowest of 15 · 61% of median | 9 | 5.1 |
| 2015 | 161 | 12th lowest of 15 · 156% of median | 138 | 3.5 |
| 2016 | 167 | 13th lowest of 15 · 162% of median | 79 | 4.2 |
| 2017 | 124 | 10th lowest of 15 · 120% of median | 58 | 3.2 |
| 2018 | 47 | 3rd lowest of 15 · 46% of median | 15 | 3.8 |
| 2019 | 47 | 3rd lowest of 15 · 46% of median | 83 | 1.2 |
| 2020 | 103 | 8th lowest of 15 · 100% of median | 51 | 3.9 |
| 2021 | 124 | 10th lowest of 15 · 120% of median | 32 | 6.5 |
| 2022 | 237 | 14th lowest of 15 · 230% of median | 83 | 5.4 |
| 2023 | 67 | 7th lowest of 15 · 65% of median | 87 | 4.1 |
| 2024 | 123 | 9th lowest of 15 · 119% of median | 70 | 3.7 |
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.