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EAST BOULDER DITCH
Structure dossier · WDID 0600575 · DITCH · SOUTH BOULDER CREEK · DWR record
Where this page's figures come from
Generated 2026-08-27 21:06 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 1860-05-01 — 36th 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: 0605427 (1860-04-01). Immediately behind: JONES DONNELLY DITCH (1860-05-01).
On SOUTH BOULDER CREEK at river mile 16.0, it is 31st of 58 down the reach. Immediately upstream: LAFAYETTE DIVERSION PT 4. Immediately downstream: LOUISVILLE RES NO 1.
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 (13)
| 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 |
|---|---|---|---|---|---|---|---|
| 3774.0 | 1860-05-01 | 1882-06-02 | 0.0 | 0.0 | C | IRRINDRECDOMOTH | |
| 4474.0 | 1862-04-01 | 1882-06-02 | 20.901 | 0.0 | C | IRR | |
| 5235.0 | 1864-05-01 | 1882-06-02 | 1.69 | 0.0 | C | IRRMUNINDFISFIRDOMAUGOTH | |
| 5511.0 | 1865-02-01 | 1882-06-02 | 0.0 | 0.0 | C | STOIRRMUNCOMINDRECFISFIRDOMOTH | |
| 5570.0 | 1865-04-01 | 1882-06-02 | 0.0 | 0.0 | C | IRRMUNCOMINDRECFISDOMOTH | |
| 5935.0 | 1866-04-01 | 1882-06-02 | 0.0 | 0.0 | C | IRRMUNCOMINDRECFISDOMOTH | |
| 7585.0 | 1870-10-07 | 1882-06-02 | 0.0 | 0.0 | C | IRRMUNCOMINDRECFISDOMOTH | |
| 8141.0 | 1872-04-15 | 1882-06-02 | 0.0 | 0.0 | C | IRRMUNCOMINDRECDOMOTH | |
| 8553.0 | 1873-06-01 | 1882-06-02 | 0.0 | 0.0 | C | IRRMUNCOMINDRECDOMOTH | |
| 20890.05113 | 1863-12-31 | 1926-06-21 | 64.0 | 0.0 | C | STO | |
| 22302.0 | 1911-01-23 | 1926-06-21 | 64.0 | 0.0 | C | STO | |
| 27930.26611 | 1922-11-10 | 1953-09-28 | 127.2 | 0.0 | C | STO | |
| 29219.0 | 1929-12-31 | 1953-09-28 | 127.2 | 0.0 | C | STO |
Recorded use (last 15 years on record)
In a median year this structure has a recorded diversion of 422 AF. Its most recent year on record, 2025, came in at 1,116 AF — 264% of that, and 15th 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 | 637 | 13th lowest of 15 · 151% of median | 116 | 4.1 |
| 2010 | 425 | 9th lowest of 15 · 101% of median | 104 | 4.7 |
| 2011 | 641 | 14th lowest of 15 · 152% of median | 181 | 5.8 |
| 2012 | 417 | 7th lowest of 15 · 99% of median | 138 | 2.5 |
| 2013 | 574 | 12th lowest of 15 · 136% of median | 135 | 7.3 |
| 2014 | 443 | 10th lowest of 15 · 105% of median | 141 | 3.0 |
| 2015 | 366 | 3rd lowest of 15 · 87% of median | 71 | 6.7 |
| 2016 | 393 | 5th lowest of 15 · 93% of median | 92 | 3.8 |
| 2017 | 422 | 8th lowest of 15 · 100% of median | 132 | 4.3 |
| 2018 | 260 | 1st lowest of 15 · 62% of median | 119 | 3.0 |
| 2019 | 407 | 6th lowest of 15 · 96% of median | 115 | 4.0 |
| 2020 | 367 | 4th lowest of 15 · 87% of median | 101 | 7.5 |
| 2021 | 286 | 2nd lowest of 15 · 68% of median | 77 | 5.0 |
| 2024 | 473 | 11th lowest of 15 · 112% of median | 177 | 4.7 |
| 2025 | 1,116 | 15th lowest of 15 · 264% of median | 117 | 11.3 |
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.