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HAPPY HOLLOW DITCH

Structure dossier · WDID 4000715 · 1 · HAPPY HOLLOW CREEK · 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 1894-04-20 — 1137th 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: GRANBY RES NO 10 (1893-09-30). Immediately behind: GRANBY DITCH FR WARD CR (1894-05-01).

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
20501.161811894-04-201907-09-28 1.670.0 CIRR 34

Recorded use (last 15 years on record)

In a median year this structure has a recorded diversion of 460 AF. Its most recent year on record, 2024, came in at 416 AF — 90% of that, and 7th 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 514 10th lowest of 15 · 112% of median 146 3.5
2011 593 14th lowest of 15 · 129% of median 172 2.5
2012 616 15th lowest of 15 · 134% of median 190 3.0
2013 517 11th lowest of 15 · 112% of median 185 1.7
2014 503 9th lowest of 15 · 109% of median 173 2.3
2015 460 8th lowest of 15 · 100% of median 147 2.6
2016 560 13th lowest of 15 · 122% of median 182 2.3
2017 286 6th lowest of 15 · 62% of median 121 1.7
2018 121 3rd lowest of 15 · 26% of median 128 1.1
2019 285 5th lowest of 15 · 62% of median 88 1.7
2020 257 4th lowest of 15 · 56% of median 186 1.1
2021 51 1st lowest of 15 · 11% of median 111 0.4
2022 62 2nd lowest of 15 · 14% of median 106 0.3
2023 517 11th lowest of 15 · 112% of median 147 2.8
2024 416 7th lowest of 15 · 90% of median 206 1.2

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.