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DRYER DITCH
Structure dossier · WDID 4700597 · 1 · ILLINOIS RIVER · 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 (a1c9146) — every figure regenerates from this named code version and data image.
Where it sits in line
Priority 1887-05-01 — 108th most senior of the 1262 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: DORA DITCH (1887-05-01). Immediately behind: MARR DITCH 2 (1887-05-01).
Decreed rights (3)
| 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 |
|---|---|---|---|---|---|---|---|
| 13635.0 | 1887-05-01 | 1902-04-23 | 5.2 | 0.0 | C | IRR | 81 |
| 16215.0 | 1894-05-24 | 1902-04-23 | 3.6 | 0.0 | C | IRR | 270(258) |
| 17806.0 | 1898-10-01 | 1902-04-23 | 2.4 | 0.0 | C | IRR | 296(281) |
Recorded use (last 15 years on record)
In a median year this structure has a recorded diversion of 270 AF. Its most recent year on record, 2025, came in at 164 AF — 61% of that, and 6th 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) |
|---|---|---|---|---|
| 1999 | 202 | 7th lowest of 15 · 75% of median | 17 | 6.8 |
| 2001 | 84 | 4th lowest of 15 · 31% of median | 11 | 4.7 |
| 2004 | 75 | 3rd lowest of 15 · 28% of median | 15 | 3.3 |
| 2005 | 1,365 | 12th lowest of 15 · 506% of median | 49 | 25.0 |
| 2009 | 1,523 | 14th lowest of 15 · 564% of median | 80 | 12.5 |
| 2011 | 5,476 | 15th lowest of 15 · 2028% of median | 85 | 40.0 |
| 2014 | 14 | 1st lowest of 15 · 5% of median | 5 | 1.7 |
| 2015 | 124 | 5th lowest of 15 · 46% of median | 10 | 8.4 |
| 2016 | 620 | 9th lowest of 15 · 230% of median | 88 | 6.5 |
| 2017 | 1,408 | 13th lowest of 15 · 522% of median | 22 | 35.5 |
| 2019 | 818 | 11th lowest of 15 · 303% of median | 104 | 6.9 |
| 2020 | 270 | 8th lowest of 15 · 100% of median | 77 | 4.4 |
| 2021 | 19 | 2nd lowest of 15 · 7% of median | 11 | 1.4 |
| 2022 | 804 | 10th lowest of 15 · 298% of median | 118 | 4.0 |
| 2025 | 164 | 6th lowest of 15 · 61% of median | 43 | 2.9 |
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.