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JOHN A ROSS DITCH NO 1

Structure dossier · WDID 6000657 · 1 · SPECIE CREEK · DWR record

Where this page's figures come from

Generated 2026-08-27 19:17 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 in line

Priority 1916-07-02 — 741st most senior of the 2893 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: JOHN DAVIS WASTE & SEEP (1916-07-02). Immediately behind: PLEASANT VALLEY DITCH (1916-07-02).

Decreed rights (2)

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
25826.242891916-07-021929-02-26 2.00.0 CIRR 164
27173.01924-05-251929-02-26 0.00.0 CIRR

Recorded use (last 15 years on record)

In a median year this structure has a recorded diversion of 66 AF. Its most recent year on record, 2024, came in at 12 AF — 18% of that, and 3rd 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)
2009 76 9th lowest of 15 · 115% of median 104 0.9
2010 66 8th lowest of 15 · 100% of median 50 0.9
2011 78 11th lowest of 15 · 118% of median 37 1.5
2012 40 6th lowest of 15 · 61% of median 72 0.7
2014 77 10th lowest of 15 · 117% of median 57 1.1
2015 115 15th lowest of 15 · 174% of median 100 1.1
2016 113 14th lowest of 15 · 171% of median 131 1.1
2017 98 12th lowest of 15 · 148% of median 72 1.1
2018 12 3rd lowest of 15 · 18% of median 64 0.1
2019 107 13th lowest of 15 · 162% of median 77 1.5
2020 3 1st lowest of 15 · 4% of median 19 0.1
2021 8 2nd lowest of 15 · 12% of median 47 0.2
2022 13 5th lowest of 15 · 20% of median 69 0.1
2023 58 7th lowest of 15 · 88% of median 60 1.6
2024 12 3rd lowest of 15 · 18% of median 85 0.1

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.