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OBANNON DITCH

Structure dossier · WDID 2900677 · 1 · SAN JUAN RIVER · DWR record

Where this page's figures come from

Generated 2026-08-27 20:30 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.

Which of its rights get called out?

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 1909-05-20 — 167th most senior of the 853 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: HARRIS DITCH (1907-06-01). Immediately behind: OLD STRONG DITCH (1909-05-20).

Decreed rights (5)

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
22962.216891909-05-201928-06-05 0.50.0 CIRRMUNCOMINDRECFISFIRDOMSTKAUG #199
24606.01917-05-151928-06-05 0.0010.0 CIRRMUNCOMINDRECFISFIRDOMSTKAUG #215
41016.337541942-06-011968-12-19 2.4470.0 CIRRDOM 68-83
42931.01967-07-171968-12-19 0.50.0 CIRRMUNCOMINDRECFISFIRDOMSTKAUG 68-311
50769.49941986-09-241989-12-31 5.00.0 CIRRMUNCOMINDRECFISFIRDOMSTKAUG

Recorded use (last 15 years on record)

In a median year this structure has a recorded diversion of 1,590 AF. Its most recent year on record, 2025, came in at 1,127 AF — 71% of that, and 3rd lowest of the 15 years with a recorded volume.

This structure records both diversions and reservoir releases — they are separate water movements and are accounted separately below.

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 recordReleased (AF)Days recordedPeak (cfs)
2011 1,262 4th lowest of 15 · 79% of median — 173 6.8
2012 1,835 10th lowest of 15 · 115% of median — 204 7.4
2013 1,524 6th lowest of 15 · 96% of median — 161 6.9
2014 1,590 8th lowest of 15 · 100% of median — 157 7.8
2015 1,888 11th lowest of 15 · 119% of median — 213 7.4
2016 1,774 9th lowest of 15 · 112% of median — 190 6.0
2017 2,079 12th lowest of 15 · 131% of median — 181 8.2
2018 1,588 7th lowest of 15 · 100% of median — 214 7.2
2019 873 1st lowest of 15 · 55% of median — 143 4.4
2020 2,347 15th lowest of 15 · 148% of median — 234 7.4
2021 2,127 14th lowest of 15 · 134% of median — 306 7.4
2022 1,469 5th lowest of 15 · 92% of median — 172 7.4
2023 2,090 13th lowest of 15 · 131% of median — 177 10.6
2024 952 2nd lowest of 15 · 60% of median — 164 4.1
2025 1,127 3rd lowest of 15 · 71% of median — 185 6.2

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.