Hydrohistorian
← My Water · Print / save as PDF
VALMONT LAKE RES
Structure dossier · WDID 0604230 · RESERVOIR · SOUTH BOULDER CREEK · DWR record
Where this page's figures come from
Generated 2026-08-27 23:58 by Hydrohistorian. Sources: DWR HydroBase snapshot HydroBase_CO_20260707 (history) + CDSS REST (current), USGS NWIS cross-checks. Engine v0.5.0 (96d5528) — 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: no administrative call record for this basin.
Where it sits in line
Priority 1862-04-01 — 50th most senior of the 1867 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: LEGGETT RES (1862-04-01). Immediately behind: LAST CHANCE DITCH (1862-05-01).
On SOUTH BOULDER CREEK at river mile 18.8, it is 55th of 58 down the reach. Immediately upstream: KOA LAKE. Immediately downstream: LEWIS H DAVIDSON D.
Position on the modelled network, not a claim about whose water this is — a stream carries water from many rights at once, and diverted water returns to it.
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 |
|---|---|---|---|---|---|---|---|
| 4474.0 | 1862-04-01 | 1882-06-02 | 0.0 | 0.0 | A | IRRMUNINDFISFIRDOMOTH | |
| 27930.26611 | 1922-11-10 | 1953-09-28 | 461.67 | 0.0 | A | IRRMUNCOMINDFIRDOMOTH | |
| 29219.0 | 1929-12-31 | 1953-09-28 | 2201.74 | 0.0 | A | IRRMUNCOMINDFIRDOMOTH | |
| 40740.38101 | 1954-04-26 | 1964-03-04 | 7439.16 | 551.94 | A | STOIRRMUNCOMINDFIRDOM |
Legal record & documents
18 decreed actions on record across
8 court cases:
CA14622, CA12111, W8348, W8347, W8346, 85CW0277, 85CW0276, 80CW0468.
Every case, dated
| Case | Actions | Latest adjudication | Types |
|---|---|---|---|
CA14622 | 2 | 1964-03-04 | S |
CA12111 | 2 | 1953-09-28 | S |
W8348 | 2 | 1882-06-02 | O |
W8347 | 1 | 1882-06-02 | O |
W8346 | 2 | 1882-06-02 | O |
85CW0277 | 1 | 1882-06-02 | O |
85CW0276 | 1 | 1882-06-02 | O |
80CW0468 | 7 | 1882-06-02 | 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 503 AF. Its most recent year on record, 2012, came in at 165 AF — 33% of that, and 2nd lowest of the 15 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) |
|---|---|---|---|---|
| 1997 | 1,043 | 14th lowest of 15 · 207% of median | 43 | 34.7 |
| 1998 | 565 | 10th lowest of 15 · 112% of median | 31 | 28.9 |
| 1999 | 919 | 13th lowest of 15 · 183% of median | 101 | 9.8 |
| 2000 | 558 | 9th lowest of 15 · 111% of median | 32 | 28.4 |
| 2001 | 1,229 | 15th lowest of 15 · 244% of median | 126 | 35.0 |
| 2002 | 690 | 11th lowest of 15 · 137% of median | 78 | 10.3 |
| 2003 | 905 | 12th lowest of 15 · 180% of median | 31 | 20.6 |
| 2004 | 502 | 7th lowest of 15 · 100% of median | 22 | 48.6 |
| 2005 | 397 | 5th lowest of 15 · 79% of median | 6 | 56.0 |
| 2006 | 293 | 3rd lowest of 15 · 58% of median | 53 | 4.7 |
| 2007 | 503 | 8th lowest of 15 · 100% of median | 20 | 40.0 |
| 2008 | 109 | 1st lowest of 15 · 22% of median | 9 | 14.0 |
| 2009 | 305 | 4th lowest of 15 · 61% of median | 14 | 20.0 |
| 2011 | 470 | 6th lowest of 15 · 93% of median | 24 | 31.0 |
| 2012 | 165 | 2nd lowest of 15 · 33% of median | 61 | 4.0 |
Trends for this structure
Recorded use is falling over its last 15 recorded years (-54 AF/yr, Mann-Kendall p=0.002).
Its reference gage, LH DAVIDSON DITCH: no clear flow trend.
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 | stale | 895 measured days, but newest is 5277 day(s) before the data's end (target 450) |
| record continuity | sparse | 12% of the irrigation seasons in 1977-2012 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.