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GRAND CREEK RANCH RESERVOIR UPPER
Structure dossier · WDID 5103603 · 3 · SKYLARK CREEK · DWR record
Where this page's figures come from
Generated 2026-08-27 23:51 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
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 2008-08-26 — 2045th most senior of the 2208 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: GRAND CREEK RANCH PUMP STATION (2008-08-26). Immediately behind: GRAND CREEK RANCH RESERVOIR LOWER (2008-08-26).
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 |
|---|---|---|---|---|---|---|---|
| 58074.57947 | 2008-08-26 | 2009-12-31 | 20.9 | 10.1 | A | STOIRRRECFISSTKWLD | |
| 61908.0 | 2019-07-01 | 2019-12-31 | 2.88 | 0.12 | C | IRRSTKWLD |
Legal record & documents
6 decreed actions on record across
3 court cases:
19CW3174, 17CW3228, 09CW0180.
Every case, dated
| Case | Actions | Latest adjudication | Types |
|---|---|---|---|
19CW3174 | 4 | 2019-12-31 | S |
17CW3228 | 1 | 2009-12-31 | S |
09CW0180 | 1 | 2009-12-31 | 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 6 years on record)
In a median year this structure has a recorded diversion of 455 AF. Its most recent year on record, 2023, came in at 455 AF — 100% of that, and 3rd lowest of the 5 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) |
|---|---|---|---|---|---|
| 2019 | 409 | 2nd lowest of 5 · 90% of median | 325 | 85 | 4.9 |
| 2020 | 482 | 4th lowest of 5 · 106% of median | 393 | 55 | 4.5 |
| 2021 | 349 | 1st lowest of 5 · 77% of median | 333 | 57 | 3.5 |
| 2022 | 684 | 5th lowest of 5 · 150% of median | 357 | 65 | 6.0 |
| 2023 | 455 | 3rd lowest of 5 · 100% of median | 262 | 87 | 2.7 |
| 2024 | — | no recorded volume | 197 | 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 | present | 349 measured days; currency unknown (no data-coverage date to compare against) |
| record continuity | sparse | 31% of the irrigation seasons in 2019-2024 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.