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BARR LAKE
Structure dossier · WDID 0203837 · RESERVOIR · SOUTH PLATTE RIVER · DWR record
Where this page's figures come from
Generated 2026-08-27 23:49 by Hydrohistorian. Sources: DWR HydroBase snapshot HydroBase_CO_20260707 (history) + CDSS REST (current), USGS NWIS cross-checks. Engine v0.5.0 (0576005) — 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.
Current administration
● Junior rights called out — call at LOWER LATHAM DITCH (SOUTH PLATTE RIVER, priority 1877-11-14).
● Junior rights called out — call at WESTERN MUTUAL DITCH (SOUTH PLATTE RIVER, priority 1871-08-09).
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 1870-10-25 — 345th most senior of the 21881 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: GILCREST RESERVOIR (1870-10-25). Immediately behind: 0806633 (1870-12-03).
Decreed rights (16)
| 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 |
|---|---|---|---|---|---|---|---|
| 7603.0 | 1870-10-25 | 1882-04-11 | 0.0 | 0.0 | C | MUNAUGCURRCH | |
| 7928.0 | 1871-09-15 | 1882-04-11 | 0.0 | 0.0 | C | MUNAUGCURRCH | |
| 9080.0 | 1874-11-10 | 1882-04-11 | 0.0 | 0.0 | C | MUNAUGCURRCH | |
| 10120.0 | 1877-09-15 | 1882-04-11 | 0.0 | 0.0 | C | MUNAUGCURRCH | |
| 13108.0 | 1885-11-20 | 1893-07-08 | 11081.25 | 0.0 | A | IRRMUNCOMINDRECFISFIRDOMAUGRCH | |
| 21562.0 | 1909-01-13 | 1918-08-02 | 54941.26 | 0.0 | A | IRRMUNCOMINDRECFISFIRDOMAUGRCH | |
| 45655.45437 | 1974-05-27 | 1975-12-31 | 0.0 | 0.0 | C | MUNAUGCURRCH | |
| 55882.55667 | 2002-05-30 | 2003-12-31 | 14212.3 | 787.7 | A | IRRMUNCOMINDRECDOMSTKAUGRCH | |
| 58132.0 | 2009-02-27 | 2009-12-31 | 0.0 | 0.0 | C | MUN | |
| 59068.0 | 2011-09-21 | 2011-12-31 | 3281.6 | 5718.4 | A | MUNAUGCUR | |
| 60264.0 | 2014-12-30 | 2014-12-31 | 0.0 | 9000.0 | A | MUNAUGRCH | |
| 60739.0 | 2016-04-18 | 2016-12-31 | 0.0 | 2805.0 | A | STOIRR | |
| 60739.0 | 2016-04-18 | 2016-12-31 | 0.0 | 12.0 | C | STOIRR | |
| 60980.0 | 2016-12-15 | 2016-12-31 | 0.0 | 0.0 | C | MUNAUGCURRCH | |
| 61330.0 | 2017-11-30 | 2016-12-31 | 0.0 | 3000.0 | A | MUNAUGRCH | |
| 61726.6074 | 2016-04-19 | 2019-12-31 | 0.0 | 0.0 | C | STOIRRMUNCOMINDDOMAUGCURRCH |
Legal record & documents
97 decreed actions on record across
18 court cases:
19CW3062, 16CW3195, 16CW3052, 14CW3164, 20CW3161, 11CW0280, 03CW0320, 15CW3065, 02CW0403, 03CW0442 and 8 more below.
Every case, dated
| Case | Actions | Latest adjudication | Types |
|---|---|---|---|
19CW3062 | 8 | 2019-12-31 | S |
16CW3195 | 30 | 2016-12-31 | O, S |
16CW3052 | 1 | 2016-12-31 | S |
14CW3164 | 1 | 2014-12-31 | S |
20CW3161 | 1 | 2011-12-31 | S |
11CW0280 | 1 | 2011-12-31 | S |
03CW0320 | 11 | 2009-12-31 | S |
15CW3065 | 1 | 2003-12-31 | S |
02CW0403 | 11 | 2003-12-31 | S |
03CW0442 | 2 | 2002-12-31 | S |
01CW0258 | 1 | 2001-12-31 | S |
13CW3026 | 10 | 1975-12-31 | O, S |
CA54658 | 3 | 1918-08-02 | S |
CA40750 | 2 | 1918-08-02 | S |
15CW3012 | 7 | 1918-08-02 | S |
CA11200 | 2 | 1893-07-08 | S |
02CW0351 | 2 | 1893-07-08 | S |
18CW3195 | 3 | 1884-02-04 | 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 4,055 AF. Its most recent year on record, 2025, came in at 4,611 AF — 114% of that, and 9th lowest of the 15 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) |
|---|---|---|---|---|---|
| 2011 | 1,067 | 2nd lowest of 15 · 26% of median | — | 47 | 28.4 |
| 2012 | 1,282 | 3rd lowest of 15 · 32% of median | — | 57 | 26.2 |
| 2013 | 6,943 | 12th lowest of 15 · 171% of median | — | 344 | 54.4 |
| 2014 | 16,290 | 14th lowest of 15 · 402% of median | — | 344 | 209.1 |
| 2015 | 47,423 | 15th lowest of 15 · 1170% of median | — | 364 | 325.2 |
| 2016 | 4,055 | 8th lowest of 15 · 100% of median | — | 366 | 44.6 |
| 2017 | 5,087 | 10th lowest of 15 · 126% of median | — | 299 | 56.0 |
| 2018 | 2,517 | 7th lowest of 15 · 62% of median | — | 261 | 18.4 |
| 2019 | 1,316 | 4th lowest of 15 · 32% of median | — | 220 | 23.2 |
| 2020 | 861 | 1st lowest of 15 · 21% of median | — | 179 | 18.6 |
| 2021 | 1,588 | 5th lowest of 15 · 39% of median | — | 260 | 21.9 |
| 2022 | 2,419 | 6th lowest of 15 · 60% of median | — | 206 | 46.4 |
| 2023 | 6,386 | 11th lowest of 15 · 158% of median | — | 365 | 115.0 |
| 2024 | 8,363 | 13th lowest of 15 · 206% of median | — | 366 | 181.4 |
| 2025 | 4,611 | 9th lowest of 15 · 114% of median | — | 304 | 69.1 |
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 | 16 right(s), seniority decoded |
| diversion record | present | 4647 measured days; currency unknown (no data-coverage date to compare against) |
| record continuity | patchy | 59% of the irrigation seasons in 1988-2025 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.