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HANRAHAN DITCH NO 1
Structure dossier · WDID 4300678 · 1 · PICEANCE CREEK · DWR record
Where this page's figures come from
Generated 2026-08-27 20:47 by Hydrohistorian. Sources: DWR HydroBase snapshot HydroBase_CO_20260707 (history) + CDSS REST (current), USGS NWIS cross-checks. Engine v0.5.0 (a1c9146) — every figure regenerates from this named code version and data image.
Which of its rights get called out?
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 1885-04-15 — 573rd most senior of the 3293 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: HEFLEY PUMP PLANT NO 2 (1897-08-11). Immediately behind: HANRAHAN DITCH NO 2 (1894-05-31).
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. | Units | UsesWhat the court said this water may be used for -- irrigation, municipal supply, augmentation and so on. | Case |
|---|---|---|---|---|---|---|---|
| 17420.12889 | 1885-04-15 | 1897-09-11 | 0.7 | 0.0 | C | IRR | 115 |
Recorded use (last 15 years on record)
In a median year this structure has a recorded diversion of 44 AF. Its most recent year on record, 2025, came in at 44 AF — 100% of that, and 8th lowest of the 15 years with a recorded volume.
| Year | Diverted (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 record | Days recorded | Peak (cfs) |
|---|---|---|---|---|
| 2011 | 257 | 15th lowest of 15 · 584% of median | 115 | 2.0 |
| 2012 | 123 | 10th lowest of 15 · 280% of median | 61 | 1.5 |
| 2013 | 235 | 14th lowest of 15 · 534% of median | 182 | 1.0 |
| 2014 | 125 | 11th lowest of 15 · 284% of median | 35 | 1.9 |
| 2015 | 215 | 13th lowest of 15 · 489% of median | 84 | 3.6 |
| 2016 | 109 | 9th lowest of 15 · 248% of median | 59 | 1.0 |
| 2017 | 8 | 4th lowest of 15 · 18% of median | 7 | 0.7 |
| 2018 | 35 | 7th lowest of 15 · 80% of median | 27 | 1.2 |
| 2019 | 128 | 12th lowest of 15 · 291% of median | 68 | 2.1 |
| 2020 | 1 | 1st lowest of 15 · 2% of median | 2 | 0.7 |
| 2021 | 5 | 3rd lowest of 15 · 11% of median | 47 | 0.2 |
| 2022 | 2 | 2nd lowest of 15 · 4% of median | 11 | 0.1 |
| 2023 | 18 | 5th lowest of 15 · 41% of median | 17 | 0.7 |
| 2024 | 28 | 6th lowest of 15 · 64% of median | 20 | 1.0 |
| 2025 | 44 | 8th lowest of 15 · 100% of median | 15 | 1.6 |
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.