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RAILROAD TUNNEL D NO 1

Structure dossier · WDID 4000936 · 1 · NORTH FORK GUNNISON RIVE · DWR record

Where this page's figures come from

Generated 2026-08-27 19:51 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 1929-04-01 — 1688th most senior of the 4661 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: CLEMENTS DITCH (1928-06-01). Immediately behind: ELK DITCH (1929-04-15).

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
29260.289451929-04-011937-05-28 0.820.0 CIRR H145

Recorded use (last 15 years on record)

In a median year this structure has a recorded diversion of 417 AF. Its most recent year on record, 2024, came in at 224 AF — 54% 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)
2008 420 9th lowest of 15 · 101% of median 187 2.0
2009 421 10th lowest of 15 · 101% of median 171 1.8
2010 446 11th lowest of 15 · 107% of median 165 1.5
2011 539 15th lowest of 15 · 129% of median 182 1.5
2014 499 13th lowest of 15 · 120% of median 166 1.8
2015 417 8th lowest of 15 · 100% of median 210 1.0
2016 455 12th lowest of 15 · 109% of median 154 1.5
2017 500 14th lowest of 15 · 120% of median 170 1.5
2018 294 7th lowest of 15 · 70% of median 164 1.2
2019 152 4th lowest of 15 · 36% of median 154 0.5
2020 103 3rd lowest of 15 · 25% of median 66 0.8
2021 94 2nd lowest of 15 · 22% of median 159 0.3
2022 248 6th lowest of 15 · 60% of median 168 0.8
2023 0 1st lowest of 15 · 0% of median 3 0.0
2024 224 5th lowest of 15 · 54% of median 114 1.0

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.