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SOUTH GRAY RES
Structure dossier · WDID 0303751 · 3 · BOXELDER CREEK · DWR record
Where this page's figures come from
Generated 2026-08-27 23:36 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 1882-04-01 — 137th most senior of the 2961 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: NORTH GRAY RES (1882-04-01). Immediately behind: GREELEY WELL 2-4504 (1882-04-01).
Decreed rights (3)
| 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 |
|---|---|---|---|---|---|---|---|
| 11779.0 | 1882-04-01 | 1904-12-09 | 275.0 | 0.0 | A | IRRAUG | |
| 19297.0 | 1902-11-01 | 1904-12-09 | 236.0 | 0.0 | A | IRRAUG | |
| 20066.20043 | 1904-11-16 | 1922-04-22 | 222.0 | 0.0 | A | IRRAUG |
Legal record & documents
9 decreed actions on record across
3 court cases:
CA2031, 06CW0276, CA1591.
Every case, dated
| Case | Actions | Latest adjudication | Types |
|---|---|---|---|
CA2031 | 1 | 1922-04-22 | S |
06CW0276 | 6 | 1922-04-22 | O, S |
CA1591 | 2 | 1904-12-09 | 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 316 AF. Its most recent year on record, 2020, came in at 155 AF — 49% of that, and 1st lowest of the 10 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) |
|---|---|---|---|---|---|
| 2010 | 336 | 6th lowest of 10 · 106% of median | 759 | 276 | 2.0 |
| 2011 | 970 | 10th lowest of 10 · 307% of median | 680 | 365 | 3.5 |
| 2012 | 160 | 2nd lowest of 10 · 51% of median | 373 | 92 | 1.5 |
| 2013 | 197 | 3rd lowest of 10 · 62% of median | 610 | 61 | 2.8 |
| 2014 | 296 | 5th lowest of 10 · 94% of median | 347 | 91 | 3.6 |
| 2015 | 269 | 4th lowest of 10 · 85% of median | 545 | 13 | 11.3 |
| 2016 | 700 | 8th lowest of 10 · 222% of median | 547 | 62 | 6.3 |
| 2017 | — | no recorded volume | 237 | 0 | — |
| 2018 | 426 | 7th lowest of 10 · 135% of median | 603 | 59 | 8.1 |
| 2019 | 743 | 9th lowest of 10 · 235% of median | 627 | 79 | 8.7 |
| 2020 | 155 | 1st lowest of 10 · 49% of median | 615 | 31 | 7.9 |
| 2021 | — | no recorded volume | 633 | 0 | — |
| 2022 | — | no recorded volume | 630 | 0 | — |
| 2023 | — | no recorded volume | 401 | 0 | — |
| 2024 | — | no recorded volume | 0 | 0 | — |
Trends for this structure
Recorded use shows no clear trend over its last 10 recorded years — which is itself worth knowing.
How good is our record of it?
Grade A (9/10 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 | 3 right(s), seniority decoded |
| diversion record | present | 9207 measured days; currency unknown (no data-coverage date to compare against) |
| record continuity | continuous | 83% of the irrigation seasons in 1972-2024 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.