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MARIANO DITCH
Structure dossier · WDID 0400534 · 1 · BIG THOMPSON RIVER · DWR record
Where this page's figures come from
Generated 2026-08-27 21:10 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 1863-05-01 — 24th most senior of the 1296 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: ADRIAN POND (1863-04-01). Immediately behind: BIG T PLATTE R DITCH (1865-11-18).
Decreed rights (1)
| 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 |
|---|---|---|---|---|---|---|---|
| 4869.0 | 1863-05-01 | 1883-05-28 | 3.12 | 0.0 | C | IRR |
Recorded use (last 15 years on record)
In a median year this structure has a recorded diversion of 58 AF. Its most recent year on record, 2024, came in at 66 AF — 114% of that, and 10th 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) |
|---|---|---|---|---|
| 2006 | 112 | 14th lowest of 15 · 193% of median | 53 | 1.5 |
| 2007 | 121 | 15th lowest of 15 · 209% of median | 55 | 1.5 |
| 2008 | 65 | 9th lowest of 15 · 112% of median | 28 | 1.5 |
| 2009 | 58 | 8th lowest of 15 · 100% of median | 30 | 1.0 |
| 2010 | 30 | 2nd lowest of 15 · 52% of median | 17 | 1.0 |
| 2011 | 24 | 1st lowest of 15 · 41% of median | 14 | 1.0 |
| 2012 | 53 | 6th lowest of 15 · 91% of median | 62 | 1.2 |
| 2013 | 57 | 7th lowest of 15 · 98% of median | 42 | 2.4 |
| 2017 | 96 | 13th lowest of 15 · 166% of median | 39 | 1.5 |
| 2018 | 36 | 3rd lowest of 15 · 62% of median | 14 | 1.5 |
| 2019 | 36 | 3rd lowest of 15 · 62% of median | 46 | 1.9 |
| 2020 | 67 | 11th lowest of 15 · 116% of median | 84 | 1.9 |
| 2021 | 94 | 12th lowest of 15 · 162% of median | 31 | 2.0 |
| 2022 | 48 | 5th lowest of 15 · 83% of median | 18 | 1.5 |
| 2024 | 66 | 10th lowest of 15 · 114% of median | 25 | 1.5 |
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.