Hydrohistorian

← My Water  ·  Print / save as PDF

LITTLE MARY DITCH

Structure dossier · WDID 4000927 · 1 · NORTH FORK GUNNISON RIVE · DWR record

Where this page's figures come from

Generated 2026-08-27 20:52 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 1905-04-15 — 1343rd most senior of the 4661 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: SCHINDELAR RESERVOIR (1903-09-15). Immediately behind: ALUM GULCH DITCH (1905-06-01).

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. UnitsUsesWhat the court said this water may be used for -- irrigation, municipal supply, augmentation and so on.Case
24894.201931905-04-151920-08-28 0.80.0 CIRR B18
44925.201931905-04-151973-12-31 0.70.0 CIRR
59169.20241905-06-012012-12-31 1.50.0 CSTK

Recorded use (last 15 years on record)

In a median year this structure has a recorded diversion of 319 AF. Its most recent year on record, 2024, came in at 448 AF — 140% 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)
2010 380 10th lowest of 15 · 119% of median 164 2.0
2011 260 7th lowest of 15 · 82% of median 182 1.0
2012 646 15th lowest of 15 · 202% of median 94 3.5
2013 157 5th lowest of 15 · 49% of median 143 0.8
2014 354 9th lowest of 15 · 111% of median 166 1.2
2015 637 14th lowest of 15 · 200% of median 214 1.5
2016 319 8th lowest of 15 · 100% of median 161 1.0
2017 536 13th lowest of 15 · 168% of median 181 1.5
2018 141 4th lowest of 15 · 44% of median 164 0.5
2019 180 6th lowest of 15 · 56% of median 152 0.6
2020 65 1st lowest of 15 · 20% of median 66 0.5
2021 79 2nd lowest of 15 · 25% of median 160 0.5
2022 132 3rd lowest of 15 · 41% of median 168 0.4
2023 478 12th lowest of 15 · 150% of median 170 1.5
2024 448 11th lowest of 15 · 140% of median 114 2.0

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.