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PERRY PIT EAST RESERVOIR
Structure dossier · WDID 0203503 · RESERVOIR · SOUTH PLATTE RIVER · DWR record
Where this page's figures come from
Generated 2026-08-27 23:53 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
● Fully called out — call at LOWER LATHAM DITCH (SOUTH PLATTE RIVER, priority 1877-11-14).
● Fully called out — call at WESTERN MUTUAL DITCH (SOUTH PLATTE RIVER, priority 1871-08-09).
● Fully called out — call at HARMONY DITCH 1 (SOUTH PLATTE RIVER, priority 1897-05-02).
● Fully called out — call at SOUTH PLATTE RIVER COMPACT (SOUTH PLATTE RIVER, priority 1897-06-13).
● Fully 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 1997-12-31 — 12435th 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: SLOUGH DITCH 2 (1997-12-31). Immediately behind: 0209888 (1997-12-31).
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 |
|---|---|---|---|---|---|---|---|
| 54056.0 | 1997-12-31 | 1997-12-31 | 32.99 | 1367.01 | A | IRRINDFISAUGOTHWLD | |
| 61541.0 | 2018-06-29 | 2015-12-31 | 0.0 | 700.0 | A | AUGCUR | |
| 61541.0 | 2018-06-29 | 2015-12-31 | 0.0 | 4.82 | C | AUGCUR |
Legal record & documents
7 decreed actions on record across
4 court cases:
15CW3178, 97CW0390, 20CW3203, 12CW0180.
Every case, dated
| Case | Actions | Latest adjudication | Types |
|---|---|---|---|
15CW3178 | 2 | 2015-12-31 | S |
97CW0390 | 1 | 1997-12-31 | S |
20CW3203 | 1 | 1997-12-31 | S |
12CW0180 | 3 | 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 12 years on record)
In a median year this structure has a recorded diversion of 242 AF. Its most recent year on record, 2025, came in at 122 AF — 50% of that, and 5th lowest of the 12 years with a recorded volume.
This structure records both diversions and reservoir releases — they are separate water movements and are accounted separately below.
| 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 | Released (AF) | Days recorded | Peak (cfs) |
|---|---|---|---|---|---|
| 2013 | 22 | 2nd lowest of 12 · 9% of median | 169 | 33 | 1.4 |
| 2014 | 334 | 10th lowest of 12 · 138% of median | 38 | 272 | 4.7 |
| 2015 | 267 | 8th lowest of 12 · 111% of median | 244 | 271 | 3.0 |
| 2016 | 401 | 11th lowest of 12 · 166% of median | 920 | 212 | 4.4 |
| 2018 | 326 | 9th lowest of 12 · 135% of median | — | 191 | 7.6 |
| 2019 | 3 | 1st lowest of 12 · 1% of median | 19 | 6 | 1.3 |
| 2020 | 78 | 4th lowest of 12 · 32% of median | 158 | 89 | 3.5 |
| 2021 | 227 | 6th lowest of 12 · 94% of median | 283 | 96 | 3.0 |
| 2022 | 256 | 7th lowest of 12 · 106% of median | 207 | 365 | 1.8 |
| 2023 | 23 | 3rd lowest of 12 · 10% of median | 1,131 | 365 | 0.5 |
| 2024 | 721 | 12th lowest of 12 · 299% of median | 521 | 366 | 11.6 |
| 2025 | 122 | 5th lowest of 12 · 50% of median | 115 | 304 | 1.1 |
Trends for this structure
Recorded use shows no clear trend over its last 12 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 | 3 right(s), seniority decoded |
| diversion record | present | 2570 measured days; currency unknown (no data-coverage date to compare against) |
| record continuity | patchy | 63% of the irrigation seasons in 2006-2025 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.