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MARY ISH DITCH
Structure dossier · WDID 4700757 · 1 · DEER CREEK · DWR record
Where this page's figures come from
Generated 2026-08-27 20:34 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.
Which of its rights get called out?
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 1886-06-15 — 461st 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: MACFARLANE RES (1910-10-20). Immediately behind: HUGH GRIFFITH DITCH (1888-05-01).
Decreed rights (1)
| 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 |
|---|---|---|---|---|---|---|---|
| 23016.13315 | 1886-06-15 | 1923-03-06 | 4.5 | 0.0 | C | IRR | 371.5 |
Recorded use (last 15 years on record)
In a median year this structure has a recorded diversion of 121 AF. Its most recent year on record, 2025, came in at 6 AF — 5% of that, and 2nd 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 | 110 | 7th lowest of 15 · 91% of median | 103 | 1.0 |
| 1997 | 161 | 10th lowest of 15 · 133% of median | 42 | 3.0 |
| 1998 | 101 | 6th lowest of 15 · 84% of median | 33 | 2.0 |
| 1999 | 93 | 5th lowest of 15 · 77% of median | 78 | 1.0 |
| 2000 | 81 | 4th lowest of 15 · 67% of median | 42 | 2.0 |
| 2001 | 51 | 3rd lowest of 15 · 42% of median | 23 | 2.2 |
| 2003 | 256 | 13th lowest of 15 · 212% of median | 70 | 5.0 |
| 2004 | 156 | 9th lowest of 15 · 129% of median | 56 | 2.5 |
| 2005 | 265 | 14th lowest of 15 · 219% of median | 74 | 3.5 |
| 2006 | 121 | 8th lowest of 15 · 100% of median | 34 | 3.0 |
| 2007 | 245 | 12th lowest of 15 · 202% of median | 66 | 3.0 |
| 2014 | 298 | 15th lowest of 15 · 246% of median | 76 | 2.0 |
| 2015 | 190 | 11th lowest of 15 · 157% of median | 97 | 1.0 |
| 2019 | 0 | 1st lowest of 15 · 0% of median | 1 | 0.0 |
| 2025 | 6 | 2nd lowest of 15 · 5% of median | 30 | 0.1 |
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.