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CASTLE DITCH
Structure dossier · WDID 4700549 · 1 · GRIZZLY CREEK · DWR record
Where this page's figures come from
Generated 2026-08-27 20:59 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 1887-06-15 — 128th 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: BURKE DITCH (1887-06-15). Immediately behind: ELLEN DITCH (1887-06-15).
Decreed rights (4)
| 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 |
|---|---|---|---|---|---|---|---|
| 13680.0 | 1887-06-15 | 1892-09-19 | 2.5 | 0.0 | C | IRR | 53 |
| 16918.0 | 1896-04-26 | 1902-04-23 | 9.0 | 0.0 | C | IRR | 146(130) |
| 50403.3564 | 1947-07-31 | 1988-12-31 | 2.0 | 0.0 | C | STK | |
| 56613.55269 | 2001-04-27 | 2005-12-31 | 3.3 | 0.0 | C | IRR |
Recorded use (last 15 years on record)
In a median year this structure has a recorded diversion of 1,459 AF. Its most recent year on record, 2025, came in at 1,712 AF — 117% of that, and 11th 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) |
|---|---|---|---|---|
| 2010 | 1,416 | 6th lowest of 15 · 97% of median | 109 | 16.0 |
| 2011 | 1,490 | 9th lowest of 15 · 102% of median | 45 | 20.0 |
| 2012 | 767 | 3rd lowest of 15 · 53% of median | 80 | 10.0 |
| 2013 | 1,533 | 10th lowest of 15 · 105% of median | 67 | 18.0 |
| 2014 | 1,459 | 8th lowest of 15 · 100% of median | 64 | 15.2 |
| 2015 | 3,191 | 15th lowest of 15 · 219% of median | 123 | 17.0 |
| 2016 | 698 | 2nd lowest of 15 · 48% of median | 38 | 16.0 |
| 2017 | 1,146 | 4th lowest of 15 · 78% of median | 82 | 10.0 |
| 2019 | 0 | 1st lowest of 15 · 0% of median | 2 | 0.0 |
| 2020 | 1,857 | 12th lowest of 15 · 127% of median | 64 | 16.0 |
| 2021 | 2,329 | 14th lowest of 15 · 160% of median | 82 | 20.0 |
| 2022 | 1,964 | 13th lowest of 15 · 135% of median | 62 | 20.0 |
| 2023 | 1,383 | 5th lowest of 15 · 95% of median | 38 | 26.7 |
| 2024 | 1,448 | 7th lowest of 15 · 99% of median | 49 | 20.0 |
| 2025 | 1,712 | 11th lowest of 15 · 117% of median | 79 | 14.0 |
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.