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BOULDER LARIMER CO IRR MFG D
Structure dossier · WDID 0400588 · 1 · LITTLE THOMPSON RIVER · DWR record
Where this page's figures come from
Generated 2026-08-27 23:48 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 1875-06-30 — 39th most senior of the 1296 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: PERKINS DITCH (1874-06-15). Immediately behind: EAGLE DITCH (1877-03-01).
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 |
|---|---|---|---|---|---|---|---|
| 9312.0 | 1875-06-30 | 1883-05-28 | 27.2 | 0.0 | C | STOIRRAUG | |
| 10002.0 | 1877-05-20 | 1883-05-28 | 39.52 | 0.0 | C | STOIRRAUG | |
| 14691.09312 | 1875-06-30 | 1916-06-29 | 85.0 | 0.0 | C | STO | |
| 14691.10002 | 1877-05-20 | 1916-06-29 | 85.0 | 0.0 | C | STO | |
| 14869.0 | 1890-09-16 | 1916-06-29 | 85.0 | 0.0 | C | STO | |
| 19726.0 | 1904-01-04 | 1916-06-29 | 400.0 | 0.0 | C | STO | |
| 46020.46001 | 1975-12-12 | 1976-12-31 | 15.0 | 0.0 | C | STO | |
| 53691.50198 | 1987-06-09 | 1997-12-31 | 400.0 | 0.0 | C | STO |
Legal record & documents
13 decreed actions on record across
5 court cases:
97CW0363, W8451, CA4862, 95CW0238, 05/28/1883.
Every case, dated
| Case | Actions | Latest adjudication | Types |
|---|---|---|---|
97CW0363 | 1 | 1997-12-31 | S |
W8451 | 1 | 1976-12-31 | S |
CA4862 | 4 | 1916-06-29 | S |
95CW0238 | 4 | 1883-05-28 | O |
05/28/1883 | 3 | 1883-05-28 | 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 4,885 AF. Its most recent year on record, 2024, came in at 4,885 AF — 100% of that, and 8th 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) |
|---|---|---|---|---|
| 2009 | 5,290 | 11th lowest of 15 · 108% of median | 87 | 84.0 |
| 2010 | 4,477 | 5th lowest of 15 · 92% of median | 113 | 179.0 |
| 2011 | 9,063 | 15th lowest of 15 · 186% of median | 137 | 129.0 |
| 2012 | 1,048 | 2nd lowest of 15 · 22% of median | 112 | 28.8 |
| 2013 | 3,918 | 3rd lowest of 15 · 80% of median | 64 | 143.0 |
| 2014 | 5,635 | 12th lowest of 15 · 115% of median | 172 | 51.8 |
| 2015 | 4,496 | 6th lowest of 15 · 92% of median | 85 | 155.0 |
| 2016 | 5,215 | 10th lowest of 15 · 107% of median | 88 | 82.3 |
| 2017 | 7,145 | 13th lowest of 15 · 146% of median | 87 | 99.8 |
| 2018 | 754 | 1st lowest of 15 · 15% of median | 44 | 21.9 |
| 2019 | 5,139 | 9th lowest of 15 · 105% of median | 105 | 92.7 |
| 2020 | 4,528 | 7th lowest of 15 · 93% of median | 65 | 109.0 |
| 2021 | 7,222 | 14th lowest of 15 · 148% of median | 109 | 151.0 |
| 2023 | 3,941 | 4th lowest of 15 · 81% of median | 77 | 70.8 |
| 2024 | 4,885 | 8th lowest of 15 · 100% of median | 91 | 82.8 |
Call-derived yield: senior right divertible 58.0% of a median season / 9.3% dry-year.
Trends for this structure
Recorded use shows no clear trend over its last 15 recorded years — which is itself worth knowing.
How good is our record of it?
Grade B (8/10 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 | 10064 measured days; currency unknown (no data-coverage date to compare against) |
| record continuity | patchy | 63% of the irrigation seasons in 1950-2024 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.