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WEST ARAPAHOE RES
Structure dossier · WDID 4703628 · 3 · ARAPAHO CREEK · DWR record
Where this page's figures come from
Generated 2026-08-28 02:59 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.
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 1951-08-14 — 602nd most senior of the 1262 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: MCGOWAN RES (1951-08-12). Immediately behind: BENNETT RESERVOIR (1952-10-10).
Decreed rights (2)
| 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 |
|---|---|---|---|---|---|---|---|
| 37115.0 | 1951-08-14 | 1958-01-10 | 125.3 | 0.0 | A | IRR | 36 |
| 47116.41447 | 1963-06-24 | 1979-12-31 | 372.6 | 0.0 | A | IRRDOMSTK |
Legal record & documents
3 decreed actions on record across
3 court cases:
83CW0078, 79CW0037, CA0511.
Every case, dated
| Case | Actions | Latest adjudication | Types |
|---|---|---|---|
83CW0078 | 1 | 1979-12-31 | S |
79CW0037 | 1 | 1979-12-31 | S |
CA0511 | 1 | 1958-01-10 | S |
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 10 years on record)
In a median year this structure has a recorded diversion of 233 AF. Its most recent year on record, 2010, came in at 226 AF — 97% of that, and 1st lowest of the 2 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) |
|---|---|---|---|---|---|
| 2003 | — | no recorded volume | 478 | 0 | — |
| 2004 | — | no recorded volume | 175 | 0 | — |
| 2005 | — | no recorded volume | 117 | 0 | — |
| 2006 | — | no recorded volume | 231 | 0 | — |
| 2007 | — | no recorded volume | 328 | 0 | — |
| 2008 | — | no recorded volume | 116 | 0 | — |
| 2009 | 240 | 2nd lowest of 2 · 103% of median | 128 | 14 | 9.5 |
| 2010 | 226 | 1st lowest of 2 · 97% of median | 235 | 16 | 7.6 |
| 2013 | — | no recorded volume | 285 | 0 | — |
| 2014 | — | no recorded volume | 64 | 0 | — |
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 | 2 right(s), seniority decoded |
| diversion record | fragment | 30 measured day(s) on file (under 180 -- a season, not a history) |
| record continuity | unknown | record too short to assess continuity (needs 2+ years of span and 180+ 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.