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BOULDER WHITE ROCK DITCH
Structure dossier · WDID 0600516 · DITCH · BOULDER CREEK · DWR record
Where this page's figures come from
Generated 2026-08-27 23:23 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 1862-06-01 — 54th 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: BOULDER LEFT HAND DITCH (1862-06-01). Immediately behind: FARMERS DITCH (1862-06-01).
On MAINSTEM at river mile 9.2, it is 8th of 78 down the reach. Immediately upstream: BOULDER LEFT HAND DITCH. Immediately downstream: MCCARTY DITCH.
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 (9)
| 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 |
|---|---|---|---|---|---|---|---|
| 4535.0 | 1862-06-01 | 1882-06-02 | 0.0 | 0.0 | C | IRRMUNRECDOMSTKOTH | |
| 4657.0 | 1862-10-01 | 1882-06-02 | 0.0 | 0.0 | C | IRRMUNRECDOMSTKOTH | |
| 8706.0 | 1873-11-01 | 1882-06-02 | 134.13 | 0.0 | C | IRR | |
| 16303.0 | 1894-08-20 | 1900-12-19 | 235.0 | 0.0 | C | STO | |
| 20890.19874 | 1904-05-31 | 1926-06-21 | 200.0 | 0.0 | C | STOIRR | |
| 27930.2029 | 1905-07-21 | 1953-09-28 | 50.0 | 0.0 | C | STO | |
| 29219.0 | 1929-12-31 | 1953-09-28 | 190.0 | 0.0 | C | STO | |
| 29391.0 | 1930-06-21 | 1953-09-28 | 50.0 | 0.0 | C | STO | |
| 32385.0 | 1938-09-01 | 1953-09-28 | 50.0 | 0.0 | C | STO |
Legal record & documents
12 decreed actions on record across
6 court cases:
CA12111, CA6672, CA3944, CA1370, 84CW0204, 81CW0466.
Every case, dated
| Case | Actions | Latest adjudication | Types |
|---|---|---|---|
CA12111 | 4 | 1953-09-28 | S |
CA6672 | 2 | 1926-06-21 | S |
CA3944 | 1 | 1900-12-19 | S |
CA1370 | 1 | 1882-06-02 | O |
84CW0204 | 1 | 1882-06-02 | O |
81CW0466 | 3 | 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 10,656 AF. Its most recent year on record, 2025, came in at 11,296 AF — 106% of that, and 11th 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) |
|---|---|---|---|---|
| 2011 | 16,108 | 15th lowest of 15 · 151% of median | 226 | 100.0 |
| 2012 | 8,656 | 6th lowest of 15 · 81% of median | 243 | 62.1 |
| 2013 | 14,329 | 13th lowest of 15 · 134% of median | 242 | 108.0 |
| 2014 | 15,510 | 14th lowest of 15 · 146% of median | 199 | 114.5 |
| 2015 | 9,635 | 7th lowest of 15 · 90% of median | 159 | 79.9 |
| 2016 | 8,493 | 5th lowest of 15 · 80% of median | 157 | 48.4 |
| 2017 | 13,051 | 12th lowest of 15 · 122% of median | 203 | 98.3 |
| 2018 | 10,656 | 8th lowest of 15 · 100% of median | 261 | 95.1 |
| 2019 | 11,050 | 9th lowest of 15 · 104% of median | 212 | 78.8 |
| 2020 | 11,209 | 10th lowest of 15 · 105% of median | 158 | 89.8 |
| 2021 | 2,144 | 2nd lowest of 15 · 20% of median | 67 | 30.0 |
| 2022 | 220 | 1st lowest of 15 · 2% of median | 13 | 11.7 |
| 2023 | 2,350 | 3rd lowest of 15 · 22% of median | 117 | 25.0 |
| 2024 | 7,461 | 4th lowest of 15 · 70% of median | 324 | 63.6 |
| 2025 | 11,296 | 11th lowest of 15 · 106% of median | 257 | 99.2 |
Trends for this structure
Recorded use shows no clear trend over its last 15 recorded years — which is itself worth knowing.
Its reference gage, NORTH BOULDER FARMERS DITCH RETURN TO BOULDER CREEK: no clear flow trend.
How good is our record of it?
Grade A (9/10 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 | 9 right(s), seniority decoded |
| diversion record | current | 10934 measured days, newest 285 day(s) before the data's end (DWR publishes ~1 year in arrears) |
| record continuity | patchy | 68% of the irrigation seasons in 1950-2025 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.