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MEXICAN RESERVOIR
Structure dossier · WDID 4703616 · 3 · MEXICAN CREEK · DWR record
Where this page's figures come from
Generated 2026-08-28 01:26 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 1915-06-01 — 547th 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: MEXICAN DITCH (1915-05-31). Immediately behind: WEST BOETTCHER DITCH (1916-09-01).
Decreed rights (4)
| 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 |
|---|---|---|---|---|---|---|---|
| 30280.23892 | 1915-06-01 | 1939-06-20 | 153.7 | 0.0 | A | IRR | 15 |
| 33534.23892 | 1915-06-01 | 1958-01-10 | 48.0 | 0.0 | A | IRR | 23 |
| 59900.41089 | 1962-07-01 | 2014-12-31 | 101.0 | 0.0 | A | IRRSTK | |
| 59900.59809 | 2013-10-01 | 2014-12-31 | 0.0 | 500.7 | A | IRRFISSTK |
Legal record & documents
7 decreed actions on record across
4 court cases:
14CW3048, CA0511, 11CW0037, CA0286.
Every case, dated
| Case | Actions | Latest adjudication | Types |
|---|---|---|---|
14CW3048 | 4 | 2014-12-31 | S |
CA0511 | 1 | 1958-01-10 | S |
11CW0037 | 1 | 1958-01-10 | S |
CA0286 | 1 | 1939-06-20 | 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 11 years on record)
In a median year this structure has a recorded diversion of 111 AF. Its most recent year on record, 2012, came in at 97 AF — 87% of that, and 4th lowest of the 8 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 | 79 | 0 | — |
| 2004 | 164 | 6th lowest of 8 · 148% of median | 90 | 25 | 4.6 |
| 2005 | 95 | 3rd lowest of 8 · 86% of median | 139 | 15 | 5.5 |
| 2006 | 213 | 8th lowest of 8 · 192% of median | 159 | 36 | 4.6 |
| 2007 | 125 | 5th lowest of 8 · 113% of median | 76 | 28 | 3.8 |
| 2008 | 89 | 2nd lowest of 8 · 80% of median | 138 | 22 | 3.2 |
| 2009 | 15 | 1st lowest of 8 · 14% of median | 6 | 11 | 1.1 |
| 2011 | 202 | 7th lowest of 8 · 182% of median | 104 | 10 | 11.3 |
| 2012 | 97 | 4th lowest of 8 · 87% of median | 0 | 5 | 12.3 |
| 2013 | — | no recorded volume | 11 | 0 | — |
| 2014 | — | no recorded volume | 118 | 0 | — |
Trends for this structure
Recorded use shows no clear trend over its last 8 recorded years — which is itself worth knowing.
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 | 4 right(s), seniority decoded |
| diversion record | fragment | 152 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.