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PATTERSON DITCH
Structure dossier · WDID 0200836 · DITCH · SOUTH PLATTE RIVER · DWR record
Where this page's figures come from
Generated 2026-08-27 23:33 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
● Junior rights called out — call at HARMONY DITCH 1 (SOUTH PLATTE RIVER, priority 1897-05-02).
● Junior rights called out — call at SOUTH PLATTE RIVER COMPACT (SOUTH PLATTE RIVER, priority 1897-06-13).
● Junior rights called out — call at LOWER PLATTE BEAVER D (SOUTH PLATTE RIVER, priority 1888-04-14).
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 1871-05-01 — 368th 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: 0803509 (1871-04-30). Immediately behind: 2302909 (1871-05-15).
Decreed rights (4)
| 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 |
|---|---|---|---|---|---|---|---|
| 7791.0 | 1871-05-01 | 1883-04-28 | 19.92 | 0.0 | C | IRR | |
| 50038.50038 | 1986-12-31 | 1987-12-31 | 0.0 | 370.0 | C | IRRMUNRECDOMAUG | |
| 51864.0 | 1991-12-31 | 1991-12-31 | 0.0 | 370.0 | C | STO | |
| 53691.0 | 1996-12-31 | 1996-12-31 | 0.0 | 0.0 | C | MUNALL |
Legal record & documents
5 decreed actions on record across
4 court cases:
96CW1116, 91CW0126, 86CW0403, CA6009.
Every case, dated
| Case | Actions | Latest adjudication | Types |
|---|---|---|---|
96CW1116 | 1 | 1996-12-31 | S |
91CW0126 | 2 | 1996-12-31 | S |
86CW0403 | 1 | 1987-12-31 | S |
CA6009 | 1 | 1883-04-28 | 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 5,343 AF. Its most recent year on record, 2025, came in at 5,100 AF — 96% of that, and 7th 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) |
|---|---|---|---|---|
| 2011 | 6,672 | 14th lowest of 15 · 125% of median | 209 | 19.0 |
| 2012 | 6,742 | 15th lowest of 15 · 126% of median | 206 | 20.0 |
| 2013 | 4,066 | 1st lowest of 15 · 76% of median | 141 | 18.0 |
| 2014 | 5,415 | 10th lowest of 15 · 101% of median | 184 | 19.0 |
| 2015 | 4,124 | 2nd lowest of 15 · 77% of median | 205 | 18.0 |
| 2016 | 4,708 | 3rd lowest of 15 · 88% of median | 181 | 24.7 |
| 2017 | 5,041 | 6th lowest of 15 · 94% of median | 195 | 25.1 |
| 2018 | 5,460 | 11th lowest of 15 · 102% of median | 197 | 21.4 |
| 2019 | 5,343 | 8th lowest of 15 · 100% of median | 179 | 27.1 |
| 2020 | 5,866 | 12th lowest of 15 · 110% of median | 178 | 20.9 |
| 2021 | 4,969 | 5th lowest of 15 · 93% of median | 175 | 20.9 |
| 2022 | 5,957 | 13th lowest of 15 · 112% of median | 186 | 23.5 |
| 2023 | 4,863 | 4th lowest of 15 · 91% of median | 261 | 27.8 |
| 2024 | 5,365 | 9th lowest of 15 · 100% of median | 366 | 27.4 |
| 2025 | 5,100 | 7th lowest of 15 · 96% of median | 304 | 24.7 |
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 A (9/10 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 | 4 right(s), seniority decoded |
| diversion record | present | 13376 measured days; currency unknown (no data-coverage date to compare against) |
| record continuity | continuous | 83% of the irrigation seasons in 1950-2025 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.