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KOA LAKE
Structure dossier · WDID 0603362 · RESERVOIR · SOUTH BOULDER 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 (96d5528) — every figure regenerates from this named code version and data image.
Which of its rights are out of priority?
Not computable for this structure: no administrative call record for this basin.
Where it sits in line
Priority 1989-05-22 — 1754th most senior of the 1867 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: 0603397 (1988-08-08). Immediately behind: IDAHO CR RES INLET ALT P (1990-03-06).
On SOUTH BOULDER CREEK at river mile 18.5, it is 54th of 58 down the reach. Immediately upstream: LEGGETT-VALMONT INLET D. Immediately downstream: VALMONT LAKE RES.
Position on the modelled network, not a claim about whose water this is — a stream carries water from many rights at once, and diverted water returns to it.
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 |
|---|---|---|---|---|---|---|---|
| 51134.50911 | 1989-05-22 | 1990-12-31 | 11.2 | 0.0 | A | COMIND | |
| 51191.0 | 1990-02-26 | 1990-12-31 | 0.0 | 0.0 | C | COMIND |
Recorded use (last 14 years on record)
In a median year this structure has a recorded diversion of 12 AF. Its most recent year on record, 2020, came in at 10 AF — 83% of that, and 6th lowest of the 14 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) |
|---|---|---|---|---|
| 1996 | 4 | 1st lowest of 14 · 33% of median | 3 | 1.0 |
| 1997 | 12 | 7th lowest of 14 · 100% of median | 4 | 2.5 |
| 1998 | 14 | 10th lowest of 14 · 117% of median | 2 | 7.0 |
| 1999 | 14 | 10th lowest of 14 · 117% of median | 2 | 7.0 |
| 2000 | 20 | 14th lowest of 14 · 167% of median | 12 | 3.0 |
| 2001 | 13 | 9th lowest of 14 · 108% of median | 6 | 2.6 |
| 2002 | 14 | 10th lowest of 14 · 117% of median | 7 | 4.5 |
| 2003 | 16 | 13th lowest of 14 · 133% of median | 4 | 6.5 |
| 2004 | 12 | 7th lowest of 14 · 100% of median | 4 | 4.0 |
| 2005 | 6 | 2nd lowest of 14 · 50% of median | 2 | 3.0 |
| 2006 | 9 | 5th lowest of 14 · 75% of median | 3 | 2.5 |
| 2008 | 8 | 4th lowest of 14 · 67% of median | 2 | 4.0 |
| 2012 | 6 | 2nd lowest of 14 · 50% of median | 5 | 1.0 |
| 2020 | 10 | 6th lowest of 14 · 83% of median | 3 | 2.5 |
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.