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HOLBROOK RESERVOIR
Structure dossier · WDID 1703511 · 3 · ARKANSAS RIVER · DWR record
Where this page's figures come from
Generated 2026-08-27 23:49 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 1892-03-02 — 18th most senior of the 1909 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: CANADY DITCH (1892-01-18). Immediately behind: LA JUNTA WELL NO 1 (1892-09-19).
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. | Units | UsesWhat the court said this water may be used for -- irrigation, municipal supply, augmentation and so on. | Case |
|---|---|---|---|---|---|---|---|
| 15402.0 | 1892-03-02 | 1905-04-08 | 4247.0611 | 0.0 | A | IRR | R2 |
| 20186.1964 | 1903-10-10 | 1927-02-03 | 2000.0 | 0.0 | A | IRRDOM | R20 |
| 21807.0 | 1909-09-15 | 1927-02-03 | 1196.0 | 0.0 | A | IRRDOM | R49 |
| 58863.0 | 2011-02-28 | 2011-12-31 | 0.0 | 0.0 | A | IRRMUNCOMINDRECDOMAUG |
Legal record & documents
12 decreed actions on record across
7 court cases:
16CW3103, 11CW0013, 10CW0004, 06CW0008, W3905, 02/03/1927, 04/08/1905.
Every case, dated
| Case | Actions | Latest adjudication | Types |
|---|---|---|---|
16CW3103 | 1 | 2016-12-31 | S |
11CW0013 | 1 | 2011-12-31 | S |
10CW0004 | 5 | 2010-12-31 | S |
06CW0008 | 1 | 2006-12-31 | S |
W3905 | 2 | 1927-02-03 | S |
02/03/1927 | 1 | 1927-02-03 | S |
04/08/1905 | 1 | 1905-04-08 | O |
DWR's own records for this structure: net amounts · transactions & adjudication history · scanned decrees (search a case number there for the imaged document). On this site: the district's full legal picture →
Recorded use (last 15 years on record)
In a median year this structure has a recorded diversion of 5,916 AF. Its most recent year on record, 2025, came in at 5,621 AF — 95% of that, and 7th lowest of the 14 years with a recorded volume.
This structure records both diversions and reservoir releases — they are separate water movements and are accounted separately below.
| 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 | Released (AF) | Days recorded | Peak (cfs) |
|---|---|---|---|---|---|
| 2011 | 6,210 | 8th lowest of 14 · 105% of median | 4,578 | 17 | 402.0 |
| 2012 | — | no recorded volume | 1,688 | 0 | — |
| 2013 | 8,912 | 14th lowest of 14 · 151% of median | 15,006 | 78 | 143.0 |
| 2014 | 4,249 | 4th lowest of 14 · 72% of median | 3,191 | 61 | 489.0 |
| 2015 | 4,776 | 6th lowest of 14 · 81% of median | 7,556 | 31 | 454.0 |
| 2016 | 8,820 | 13th lowest of 14 · 149% of median | 1,615 | 30 | 454.0 |
| 2017 | 7,645 | 11th lowest of 14 · 129% of median | 1,833 | 151 | 152.0 |
| 2018 | 2,563 | 3rd lowest of 14 · 43% of median | 1,291 | 365 | 377.0 |
| 2019 | 8,612 | 12th lowest of 14 · 146% of median | 3,426 | 334 | 530.0 |
| 2020 | 0 | 1st lowest of 14 · 0% of median | 3,070 | 85 | 0.0 |
| 2021 | 4,596 | 5th lowest of 14 · 78% of median | 3,185 | 365 | 523.0 |
| 2022 | 0 | 1st lowest of 14 · 0% of median | — | 365 | 0.0 |
| 2023 | 7,429 | 10th lowest of 14 · 126% of median | — | 365 | 440.0 |
| 2024 | 6,878 | 9th lowest of 14 · 116% of median | 4,327 | 366 | 547.0 |
| 2025 | 5,621 | 7th lowest of 14 · 95% of median | 6,609 | 303 | 377.2 |
Trends for this structure
Recorded use shows no clear trend over its last 14 recorded years — which is itself worth knowing.
How good is our record of it?
Grade B (7/10 points) — the components below are the finding; the letter alone is not.
The rubric, component by component
| Check | State | Detail |
|---|---|---|
| identity | complete | name, type, and water source all on file |
| decreed rights | on file | 4 right(s), seniority decoded |
| diversion record | present | 3182 measured days; currency unknown (no data-coverage date to compare against) |
| record continuity | sparse | 22% of the irrigation seasons in 1959-2025 carry measured days |
| published-record stability | stable | no upstream revisions recorded against this structure |
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.