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MACK DITCH
Structure dossier · WDID 4400821 · 1 · YAMPA RIVER · DWR record
Where this page's figures come from
Generated 2026-08-27 19:16 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 1968-06-05 — 660th most senior of the 3562 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: JOE WELL NO 1 (1968-06-03). Immediately behind: JOHN BRYANT WELL (1968-06-14).
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 |
|---|---|---|---|---|---|---|---|
| 43255.0 | 1968-06-05 | 1972-05-30 | 9.88 | 0.0 | C | IRRSTK | 63, 63A |
Recorded use (last 15 years on record)
In a median year this structure has a recorded diversion of 126 AF. Its most recent year on record, 2023, came in at 211 AF — 168% 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) |
|---|---|---|---|---|
| 2003 | 208 | 9th lowest of 15 · 165% of median | 15 | 7.5 |
| 2004 | 253 | 12th lowest of 15 · 201% of median | 18 | 7.5 |
| 2005 | 312 | 13th lowest of 15 · 248% of median | 23 | 7.5 |
| 2006 | 446 | 15th lowest of 15 · 354% of median | 31 | 7.5 |
| 2007 | 376 | 14th lowest of 15 · 298% of median | 50 | 4.7 |
| 2008 | 91 | 5th lowest of 15 · 72% of median | 15 | 5.1 |
| 2009 | 126 | 8th lowest of 15 · 100% of median | 17 | 4.9 |
| 2010 | 105 | 7th lowest of 15 · 83% of median | 12 | 4.9 |
| 2011 | 209 | 10th lowest of 15 · 166% of median | 23 | 5.1 |
| 2013 | 67 | 4th lowest of 15 · 53% of median | 15 | 4.2 |
| 2016 | 93 | 6th lowest of 15 · 74% of median | 24 | 4.6 |
| 2018 | 0 | 1st lowest of 15 · 0% of median | 1 | 0.0 |
| 2019 | 0 | 1st lowest of 15 · 0% of median | 2 | 0.0 |
| 2020 | 0 | 1st lowest of 15 · 0% of median | 2 | 0.0 |
| 2023 | 211 | 11th lowest of 15 · 168% of median | 24 | 5.6 |
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.