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MONUMENT LAKE RESERVOIR
Structure dossier · WDID 1903857 · 3 · NORTH FORK PURGATOIRE RI · DWR record
Where this page's figures come from
Generated 2026-08-28 04:35 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 1866-05-30 — 45th most senior of the 735 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 LAKE RESERVOIR (1866-05-30). Immediately behind: SUENO RESERVOIR (1866-05-30).
Decreed rights (8)
| 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 |
|---|---|---|---|---|---|---|---|
| 5994.0 | 1866-05-30 | 1903-08-10 | 0.0 | 0.0 | C | ALL | 26 |
| 6149.0 | 1866-11-01 | 1903-08-10 | 0.0 | 0.0 | C | ALL | 28 |
| 6391.0 | 1867-07-01 | 1903-08-10 | 0.0 | 0.0 | C | ALL | 36 |
| 6635.0 | 1868-03-01 | 1903-08-10 | 0.0 | 0.0 | C | ALL | 38 |
| 8825.0 | 1874-02-28 | 1903-08-10 | 0.0 | 0.0 | C | ALL | 68 |
| 19579.11961 | 1882-09-30 | 1925-01-12 | 178.9885 | 0.0 | A | MUN | R5 |
| 20633.0 | 1906-06-29 | 1925-01-12 | 1251.2372 | 0.0 | A | MUNDOM | 8C, R8 |
| 48940.0 | 1983-12-29 | 1983-12-31 | 0.0 | 0.0 | C | IRRMUNCOMINDRECFISDOMSTKWLD |
Legal record & documents
9 decreed actions on record across
3 court cases:
83CW0131, CA6118-41, CA6118.
Every case, dated
| Case | Actions | Latest adjudication | Types |
|---|---|---|---|
83CW0131 | 6 | 1983-12-31 | O, S |
CA6118-41 | 1 | 1925-01-12 | S |
CA6118 | 2 | 1925-01-12 | 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 7 years on record)
In a median year this structure has a recorded diversion of 232 AF. Its most recent year on record, 2024, came in at 523 AF — 225% of that, and 6th lowest of the 7 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) |
|---|---|---|---|---|
| 1966 | 1,827 | 7th lowest of 7 · 788% of median | 155 | 6.5 |
| 2008 | 0 | 1st lowest of 7 · 0% of median | 8 | 0.0 |
| 2012 | 317 | 5th lowest of 7 · 137% of median | 46 | 5.3 |
| 2014 | 0 | 1st lowest of 7 · 0% of median | 15 | 0.0 |
| 2018 | 25 | 3rd lowest of 7 · 11% of median | 39 | 0.4 |
| 2023 | 232 | 4th lowest of 7 · 100% of median | 154 | 1.5 |
| 2024 | 523 | 6th lowest of 7 · 225% of median | 180 | 47.6 |
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 | 8 right(s), seniority decoded |
| diversion record | present | 597 measured days; currency unknown (no data-coverage date to compare against) |
| record continuity | sparse | 5% of the irrigation seasons in 1966-2024 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.