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GRANITE DITCH

Structure dossier · WDID 5900921 · 1 · EAST RIVER · DWR record

Where this page's figures come from

Generated 2026-08-27 19:16 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 1894-06-01 — 975th most senior of the 2360 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: ALLEN DOMESTIC SPR & PL (1890-06-01). Immediately behind: ALLEN TENANT HOUSE WELL (1894-06-01).

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
44559.162231894-06-011972-12-31 5.00.0 CIRRSTK

Recorded use (last 15 years on record)

In a median year this structure has a recorded diversion of 144 AF. Its most recent year on record, 2025, came in at 90 AF — 62% of that, and 5th 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)
2011 477 13th lowest of 15 · 331% of median 153 4.6
2012 63 3rd lowest of 15 · 44% of median 167 0.4
2013 144 8th lowest of 15 · 100% of median 178 0.9
2014 576 14th lowest of 15 · 400% of median 164 4.6
2015 100 6th lowest of 15 · 69% of median 124 0.8
2016 5,241 15th lowest of 15 · 3640% of median 142 26.7
2017 422 12th lowest of 15 · 293% of median 190 2.6
2018 49 1st lowest of 15 · 34% of median 118 0.6
2019 384 11th lowest of 15 · 267% of median 102 4.9
2020 55 2nd lowest of 15 · 38% of median 110 0.7
2021 75 4th lowest of 15 · 52% of median 168 0.5
2022 113 7th lowest of 15 · 78% of median 97 1.0
2023 146 9th lowest of 15 · 101% of median 161 0.8
2024 273 10th lowest of 15 · 190% of median 114 2.8
2025 90 5th lowest of 15 · 62% of median 88 0.7

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.