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O'GRASKE DITCH NO 1

Structure dossier · WDID 1300504 · 1 · SOUTH COLONY CREEK · DWR record

Where this page's figures come from

Generated 2026-08-28 01:25 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 1872-07-12 — 94th most senior of the 1017 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: SCHNEIDER DITCH NO 4 (1872-06-16). Immediately behind: WM CONRADTS DITCH NO 3 (1872-07-15).

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
8229.01872-07-121896-03-12 0.70.0 CIRR 49

Recorded use (last 15 years on record)

In a median year this structure has a recorded diversion of 105 AF. Its most recent year on record, 2024, came in at 108 AF — 103% of that, and 10th 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 85 5th lowest of 15 · 81% of median 78 0.8
2011 127 13th lowest of 15 · 121% of median 96 0.7
2012 83 4th lowest of 15 · 79% of median 67 0.7
2013 158 14th lowest of 15 · 150% of median 118 0.7
2014 97 7th lowest of 15 · 92% of median 71 0.7
2015 69 3rd lowest of 15 · 66% of median 53 0.7
2016 111 11th lowest of 15 · 106% of median 84 0.7
2017 118 12th lowest of 15 · 112% of median 87 0.7
2018 105 8th lowest of 15 · 100% of median 114 0.7
2019 0 1st lowest of 15 · 0% of median 1 0.0
2020 198 15th lowest of 15 · 189% of median 146 0.7
2021 92 6th lowest of 15 · 88% of median 63 0.8
2022 0 1st lowest of 15 · 0% of median 1 0.0
2023 106 9th lowest of 15 · 101% of median 78 0.7
2024 108 10th lowest of 15 · 103% of median 80 0.7

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 5667 measured days; currency unknown (no data-coverage date to compare against)
record continuity sparse 24% of the irrigation seasons in 1916-2024 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.