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GUNNISON TUNNEL AND SOUTH CANAL

Structure dossier · WDID 6200617 · 1 · GUNNISON RIVER · DWR record

Where this page's figures come from

Generated 2026-08-27 21:28 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 1901-06-01 — 172nd most senior of the 1980 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: PETERSON PINE CR DITCH (1897-06-01). Immediately behind: CRAIG DITCH - SPRING GULCH (1902-08-01).

Decreed rights (4)

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
20393.187791901-06-011913-05-08 1175.0125.0 CIRRMUNSTK 1111/4
36904.01951-01-151954-03-20 0.00.0 CMUNDOM J383
48212.478941981-02-161982-12-31 0.0900.0 CPWR
50403.492471984-10-311988-12-31 0.0235.0 CPWR

Recorded use (last 15 years on record)

In a median year this structure has a recorded diversion of 396,127 AF. Its most recent year on record, 2025, came in at 423,277 AF — 107% of that, and 13th 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 404,793 9th lowest of 15 · 102% of median 365 1095.0
2012 365,499 2nd lowest of 15 · 92% of median 366 1078.2
2013 372,641 3rd lowest of 15 · 94% of median 365 1074.0
2014 381,533 5th lowest of 15 · 96% of median 365 1065.0
2015 391,332 7th lowest of 15 · 99% of median 365 1056.0
2016 388,266 6th lowest of 15 · 98% of median 366 1100.6
2017 411,903 10th lowest of 15 · 104% of median 365 1045.0
2018 415,883 11th lowest of 15 · 105% of median 365 1092.0
2019 375,640 4th lowest of 15 · 95% of median 365 1115.0
2020 424,047 14th lowest of 15 · 107% of median 366 1086.0
2021 422,079 12th lowest of 15 · 107% of median 365 1075.0
2022 396,127 8th lowest of 15 · 100% of median 365 1112.0
2023 354,598 1st lowest of 15 · 90% of median 365 1109.0
2024 428,753 15th lowest of 15 · 108% of median 366 1128.0
2025 423,277 13th lowest of 15 · 107% of median 304 1104.0

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.