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ROBERTS IRRIGATING DITCH
Structure dossier · WDID 3600791 · 1 · BOULDER CREEK · DWR record
Where this page's figures come from
Generated 2026-08-27 19:48 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 in line
Priority 1895-04-01 — 291st most senior of the 1247 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: CATARACT LAKE AND RESERVOIR (1889-01-01). Immediately behind: HOMESTEAD DITCH (1895-12-31).
Decreed rights (2)
| 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 |
|---|---|---|---|---|---|---|---|
| 30184.16527 | 1895-04-01 | 1937-10-26 | 8.4 | 0.0 | C | IRR | 219 |
| 30184.20453 | 1905-12-31 | 1937-10-26 | 1.16 | 0.0 | C | DOMAUG | 78 |
Recorded use (last 15 years on record)
In a median year this structure has a recorded diversion of 622 AF. Its most recent year on record, 2010, came in at 540 AF — 87% of that, and 5th 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) |
|---|---|---|---|---|
| 1996 | 925 | 12th lowest of 15 · 149% of median | 159 | 4.2 |
| 1997 | 515 | 4th lowest of 15 · 83% of median | 111 | 3.2 |
| 1998 | 893 | 11th lowest of 15 · 144% of median | 178 | 3.8 |
| 1999 | 1,106 | 13th lowest of 15 · 178% of median | 188 | 5.1 |
| 2000 | 1,201 | 14th lowest of 15 · 193% of median | 182 | 5.1 |
| 2001 | 1,230 | 15th lowest of 15 · 198% of median | 184 | 5.0 |
| 2002 | 733 | 9th lowest of 15 · 118% of median | 113 | 6.8 |
| 2003 | 1 | 1st lowest of 15 · 0% of median | 11 | 0.4 |
| 2004 | 57 | 2nd lowest of 15 · 9% of median | 44 | 1.2 |
| 2005 | 107 | 3rd lowest of 15 · 17% of median | 67 | 1.4 |
| 2006 | 622 | 8th lowest of 15 · 100% of median | 157 | 3.1 |
| 2007 | 615 | 7th lowest of 15 · 99% of median | 172 | 2.9 |
| 2008 | 585 | 6th lowest of 15 · 94% of median | 166 | 2.7 |
| 2009 | 800 | 10th lowest of 15 · 129% of median | 177 | 4.8 |
| 2010 | 540 | 5th lowest of 15 · 87% of median | 146 | 3.6 |
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.