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MALLORY DITCH

Structure dossier · WDID 3800851 · 1 · FRYINGPAN RIVER · DWR record

Where this page's figures come from

Generated 2026-08-27 22:29 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 1893-06-01 — 292nd most senior of the 4788 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: EDGERTON SPG & WASTE D (1888-05-01). Immediately behind: BEAMAN DITCH (1887-05-15).

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. UnitsUsesWhat the court said this water may be used for -- irrigation, municipal supply, augmentation and so on.Case
19523.158581893-06-011903-11-23 0.10.0 CIRR 209C

Recorded use (last 15 years on record)

In a median year this structure has a recorded diversion of 26 AF. Its most recent year on record, 2022, came in at 29 AF — 112% of that, and 11th lowest of the 15 years with a recorded volume.

YearDiverted (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 recordDays recordedPeak (cfs)
2006 18 1st lowest of 15 · 69% of median 123 0.1
2007 27 9th lowest of 15 · 104% of median 148 0.1
2008 28 10th lowest of 15 · 108% of median 153 0.1
2009 40 15th lowest of 15 · 154% of median 151 0.8
2010 30 13th lowest of 15 · 115% of median 180 0.1
2012 26 8th lowest of 15 · 100% of median 149 0.1
2013 21 3rd lowest of 15 · 81% of median 150 0.1
2014 25 7th lowest of 15 · 96% of median 159 0.1
2015 23 6th lowest of 15 · 88% of median 152 0.1
2017 19 2nd lowest of 15 · 73% of median 146 0.1
2018 21 3rd lowest of 15 · 81% of median 142 0.1
2019 21 3rd lowest of 15 · 81% of median 149 0.1
2020 35 14th lowest of 15 · 135% of median 182 0.1
2021 29 11th lowest of 15 · 112% of median 153 0.1
2022 29 11th lowest of 15 · 112% of median 155 0.1

How good is our record of it?

Grade B (7/10 points) — the components below are the finding; the letter alone is not.

The rubric, component by component
CheckStateDetail
identity complete name, type, and water source all on file
decreed rights on file 1 right(s), seniority decoded
diversion record present 4057 measured days; currency unknown (no data-coverage date to compare against)
record continuity sparse 40% of the irrigation seasons in 1975-2022 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.