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MCMAHON DITCH

Structure dossier · WDID 5000617 · 1 · RED DIRT CREEK · DWR record

Where this page's figures come from

Generated 2026-08-27 21:01 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 1884-08-15 — 14th most senior of the 360 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: INFANGER DITCH NO 2 (1884-08-15). Immediately behind: TYLER DITCH (1884-08-15).

Decreed rights (8)

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
12646.01884-08-151906-08-11 0.00.0 CIRRAUG 13
13778.01887-09-211906-08-11 0.00.0 CIRRAUG 31
22494.224231911-05-241915-03-20 3400.00.0 AIRR 122
22494.224231911-05-241915-03-20 36.00.0 CIRR 122
31393.231621913-06-011938-07-13 0.00.0 CIRRAUG 150
31393.256721920-04-151938-07-13 0.00.0 CIRRAUG 153
49403.01985-04-051985-12-31 622.00.0 AIRR
49403.01985-04-051985-12-31 36.00.0 CIRR

Recorded use (last 15 years on record)

In a median year this structure has a recorded diversion of 2,967 AF. Its most recent year on record, 2024, came in at 2,924 AF — 99% of that, and 7th 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)
2010 2,658 5th lowest of 15 · 90% of median 67 35.8
2011 2,765 6th lowest of 15 · 93% of median 87 37.4
2012 2,526 3rd lowest of 15 · 85% of median 78 25.0
2013 3,431 12th lowest of 15 · 116% of median 67 32.0
2014 3,075 9th lowest of 15 · 104% of median 61 36.1
2015 2,967 8th lowest of 15 · 100% of median 59 44.2
2016 2,544 4th lowest of 15 · 86% of median 44 33.0
2017 3,513 13th lowest of 15 · 118% of median 64 35.0
2018 3,079 10th lowest of 15 · 104% of median 51 39.3
2019 2,288 1st lowest of 15 · 77% of median 97 27.0
2020 3,839 14th lowest of 15 · 129% of median 119 36.3
2021 2,520 2nd lowest of 15 · 85% of median 125 35.5
2022 3,156 11th lowest of 15 · 106% of median 131 34.0
2023 10,896 15th lowest of 15 · 367% of median 164 56.6
2024 2,924 7th lowest of 15 · 99% of median 59 31.0

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.