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MACK DITCH 2
Structure dossier · WDID 8000661 · DITCH · NORTH FORK SOUTH PLATTE RIVER · DWR record
Where this page's figures come from
Generated 2026-08-27 23:11 by Hydrohistorian. Sources: DWR HydroBase snapshot HydroBase_CO_20260707 (history) + CDSS REST (current), USGS NWIS cross-checks. Engine v0.5.0 (0576005) — 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.
Current administration
● In priority — no active call senior to this structure's rights affects its district (23 active call(s) checked).
Which of its rights are out of priority?
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 1863-05-01 — 112th most senior of the 21881 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: 8000660 (1863-05-01). Immediately behind: 8000662 (1863-05-01).
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 |
|---|---|---|---|---|---|---|---|
| 4869.0 | 1863-05-01 | 1913-05-22 | 0.1759 | 0.0 | C | IRR |
Legal record & documents
16 decreed actions on record across
11 court cases:
W7548, W7503, CA1678, CA0456, 89CW0081, 81CW0298, 81CW0143, 80CW0455, 80CW0080, 03CW0246 and 1 more below.
Every case, dated
| Case | Actions | Latest adjudication | Types |
|---|---|---|---|
W7548 | 1 | 1913-05-22 | O |
W7503 | 1 | 1913-05-22 | O |
CA1678 | 1 | 1913-05-22 | O |
CA0456 | 2 | 1913-05-22 | O |
89CW0081 | 1 | 1913-05-22 | O |
81CW0298 | 2 | 1913-05-22 | O |
81CW0143 | 2 | 1913-05-22 | O |
80CW0455 | 1 | 1913-05-22 | O |
80CW0080 | 2 | 1913-05-22 | O |
03CW0246 | 1 | 1913-05-22 | O |
03CW0238 | 2 | 1913-05-22 | O |
DWR's own records for this structure: net amounts · transactions & adjudication history · scanned decrees (search a case number there for the imaged document). On this site: the district's full legal picture →
Recorded use (last 15 years on record)
In a median year this structure has a recorded diversion of 35 AF. Its most recent year on record, 2023, came in at 4 AF — 11% of that, and 1st 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) |
|---|---|---|---|---|
| 2004 | 47 | 10th lowest of 15 · 134% of median | 141 | 0.2 |
| 2005 | 30 | 5th lowest of 15 · 86% of median | 91 | 0.2 |
| 2006 | 28 | 3rd lowest of 15 · 80% of median | 51 | 0.3 |
| 2007 | 57 | 12th lowest of 15 · 163% of median | 169 | 0.2 |
| 2008 | 29 | 4th lowest of 15 · 83% of median | 85 | 0.2 |
| 2009 | 71 | 15th lowest of 15 · 203% of median | 205 | 0.2 |
| 2011 | 59 | 13th lowest of 15 · 169% of median | 171 | 0.2 |
| 2012 | 62 | 14th lowest of 15 · 177% of median | 185 | 0.2 |
| 2013 | 41 | 9th lowest of 15 · 117% of median | 120 | 0.2 |
| 2014 | 48 | 11th lowest of 15 · 137% of median | 141 | 0.2 |
| 2015 | 32 | 6th lowest of 15 · 91% of median | 94 | 0.2 |
| 2020 | 35 | 8th lowest of 15 · 100% of median | 149 | 0.1 |
| 2021 | 9 | 2nd lowest of 15 · 26% of median | 93 | 0.1 |
| 2022 | 32 | 6th lowest of 15 · 91% of median | 106 | 0.2 |
| 2023 | 4 | 1st lowest of 15 · 11% of median | 47 | 0.1 |
Trends for this structure
Recorded use shows no clear trend over its last 15 recorded years — which is itself worth knowing.
How good is our record of it?
Grade B (8/10 points) — the components below are the finding; the letter alone is not.
The rubric, component by component
| Check | State | Detail |
|---|---|---|
| identity | complete | name, type, and water source all on file |
| decreed rights | on file | 1 right(s), seniority decoded |
| diversion record | present | 4753 measured days; currency unknown (no data-coverage date to compare against) |
| record continuity | patchy | 41% of the irrigation seasons in 1969-2023 carry measured days |
| published-record stability | stable | no upstream revisions recorded against this structure |
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.