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BOSTWICK DITCH
Structure dossier · WDID 4700521 · 1 · MICHIGAN RIVER · DWR record
Where this page's figures come from
Generated 2026-08-27 19:16 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 in line
Priority 1887-06-30 — 132nd most senior of the 1262 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: WALKER DITCH (1887-06-21). Immediately behind: EUREKA DITCH (1887-09-08).
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 |
|---|---|---|---|---|---|---|---|
| 13695.0 | 1887-06-30 | 1892-09-19 | 2.5 | 0.0 | C | IRR | 102(95) |
| 18793.0 | 1901-06-15 | 1908-07-01 | 75.0 | 0.0 | C | IRR | 313 |
| 50769.50312 | 1987-10-01 | 1989-12-31 | 5.0 | 0.0 | C | STK |
Recorded use (last 15 years on record)
In a median year this structure has a recorded diversion of 3,755 AF. Its most recent year on record, 2025, came in at 1,860 AF — 50% of that, and 4th 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 | 4,229 | 12th lowest of 15 · 113% of median | 51 | 82.0 |
| 2012 | 1,388 | 2nd lowest of 15 · 37% of median | 154 | 13.4 |
| 2013 | 2,768 | 7th lowest of 15 · 74% of median | 127 | 35.7 |
| 2014 | 3,885 | 9th lowest of 15 · 104% of median | 58 | 45.7 |
| 2015 | 1,695 | 3rd lowest of 15 · 45% of median | 79 | 30.0 |
| 2016 | 4,417 | 13th lowest of 15 · 118% of median | 131 | 46.4 |
| 2017 | 4,028 | 11th lowest of 15 · 107% of median | 133 | 49.9 |
| 2018 | 3,755 | 8th lowest of 15 · 100% of median | 45 | 52.5 |
| 2019 | 5,052 | 15th lowest of 15 · 134% of median | 116 | 50.0 |
| 2020 | 2,673 | 6th lowest of 15 · 71% of median | 125 | 34.5 |
| 2021 | 551 | 1st lowest of 15 · 15% of median | 65 | 22.4 |
| 2022 | 2,207 | 5th lowest of 15 · 59% of median | 31 | 53.7 |
| 2023 | 3,893 | 10th lowest of 15 · 104% of median | 76 | 30.5 |
| 2024 | 4,454 | 14th lowest of 15 · 119% of median | 57 | 40.1 |
| 2025 | 1,860 | 4th lowest of 15 · 50% of median | 136 | 21.5 |
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.