Hydrohistorian
← My Water · Print / save as PDF
MOUNTAIN SUPPLY RES 18
Structure dossier · WDID 0303708 · 3 · BOXELDER CREEK · DWR record
Where this page's figures come from
Generated 2026-08-28 01:50 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 1861-06-10 — 40th 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: MOUNTAIN SUPPLY RES 16 (1861-06-10). Immediately behind: RES NO 8 (1861-06-10).
Decreed rights (6)
| 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 |
|---|---|---|---|---|---|---|---|
| 4179.0 | 1861-06-10 | 1882-04-11 | 0.0 | 0.0 | C | MUN | |
| 7599.0 | 1870-10-21 | 1882-04-11 | 0.0 | 0.0 | C | MUN | |
| 8659.0 | 1873-09-15 | 1882-04-11 | 0.0 | 0.0 | C | MUN | |
| 10788.0 | 1879-07-15 | 1882-04-11 | 0.0 | 0.0 | C | MUN | |
| 20066.19768 | 1904-02-15 | 1922-04-22 | 918.0 | 0.0 | A | IRR | |
| 35050.26297 | 1921-12-31 | 1953-09-10 | 459.0 | 0.0 | A | IRR |
Legal record & documents
8 decreed actions on record across
4 court cases:
CA11217, 95CW0082, CA2031, 08CW0277.
Every case, dated
| Case | Actions | Latest adjudication | Types |
|---|---|---|---|
CA11217 | 2 | 1953-09-10 | S |
95CW0082 | 1 | 1953-09-10 | S |
CA2031 | 1 | 1922-04-22 | S |
08CW0277 | 4 | 1882-04-11 | 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 342 AF. Its most recent year on record, 2010, came in at 306 AF — 90% 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) |
|---|---|---|---|---|---|
| 1996 | — | no recorded volume | 494 | 0 | — |
| 1997 | — | no recorded volume | 262 | 0 | — |
| 1998 | — | no recorded volume | 378 | 0 | — |
| 1999 | — | no recorded volume | 535 | 0 | — |
| 2000 | — | no recorded volume | 509 | 0 | — |
| 2001 | — | no recorded volume | 222 | 0 | — |
| 2002 | — | no recorded volume | 904 | 0 | — |
| 2003 | — | no recorded volume | 413 | 0 | — |
| 2004 | — | no recorded volume | 782 | 0 | — |
| 2005 | — | no recorded volume | 401 | 0 | — |
| 2006 | — | no recorded volume | 511 | 0 | — |
| 2007 | — | no recorded volume | 209 | 0 | — |
| 2008 | — | no recorded volume | 336 | 0 | — |
| 2009 | 378 | 2nd lowest of 2 · 110% of median | 312 | 124 | 2.6 |
| 2010 | 306 | 1st lowest of 2 · 90% of median | 254 | 154 | 1.7 |
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 | 6 right(s), seniority decoded |
| diversion record | present | 1513 measured days; currency unknown (no data-coverage date to compare against) |
| record continuity | sparse | 22% of the irrigation seasons in 1978-2010 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.