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PETERSON LAKE RES
Structure dossier · WDID 0303677 · 3 · CACHE LA POUDRE RIVER · DWR record
Where this page's figures come from
Generated 2026-08-27 21:17 by Hydrohistorian. Sources: DWR HydroBase snapshot HydroBase_CO_20260707 (history) + CDSS REST (current), USGS NWIS cross-checks. Engine v0.5.0 (2deb1d7) — 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.
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 1862-03-01 — 58th most senior of the 2961 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: LONG DRAW RESERVOIR (1862-03-01). Immediately behind: CHAMBERS LAKE RES (1862-03-01).
Decreed rights (9)
| 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 |
|---|---|---|---|---|---|---|---|
| 4443.0 | 1862-03-01 | 1882-04-11 | 0.0 | 0.0 | C | MUN | |
| 5372.0 | 1864-09-15 | 1882-04-11 | 0.0 | 0.0 | C | MUN | |
| 6649.0 | 1868-03-15 | 1882-04-11 | 0.0 | 0.0 | C | MUN | |
| 8480.0 | 1873-03-20 | 1882-04-11 | 0.0 | 0.0 | C | MUN | |
| 10318.0 | 1878-04-01 | 1882-04-11 | 0.0 | 0.0 | C | MUN | |
| 11438.0 | 1881-04-25 | 1882-04-11 | 0.0 | 0.0 | C | MUN | |
| 26409.23646 | 1914-09-28 | 1945-12-18 | 0.0 | 0.0 | C | MUN | |
| 26409.26135 | 1921-07-22 | 1945-12-18 | 915.0 | 0.0 | A | IRRAUG | |
| 45655.43337 | 1968-08-26 | 1975-12-31 | 336.9 | 0.0 | A | IRRMUNIND |
Recorded use (last 15 years on record)
In a median year this structure has a recorded diversion of 1,247 AF. Its most recent year on record, 2024, came in at 1,577 AF — 126% of that, and 14th lowest of the 15 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) |
|---|---|---|---|---|---|
| 2010 | 1,183 | 5th lowest of 15 · 95% of median | 1,183 | 31 | 38.3 |
| 2011 | 1,183 | 5th lowest of 15 · 95% of median | — | 27 | 49.9 |
| 2012 | 603 | 1st lowest of 15 · 48% of median | 465 | 101 | 12.1 |
| 2013 | 650 | 2nd lowest of 15 · 52% of median | 900 | 47 | 26.2 |
| 2014 | 1,220 | 7th lowest of 15 · 98% of median | 1,128 | 43 | 47.0 |
| 2015 | 1,287 | 9th lowest of 15 · 103% of median | 909 | 83 | 36.0 |
| 2016 | 1,295 | 10th lowest of 15 · 104% of median | 1,179 | 57 | 35.3 |
| 2017 | 1,348 | 12th lowest of 15 · 108% of median | 971 | 63 | 34.8 |
| 2018 | 1,303 | 11th lowest of 15 · 104% of median | 1,174 | 44 | 29.8 |
| 2019 | 1,247 | 8th lowest of 15 · 100% of median | 1,216 | 51 | 37.8 |
| 2020 | 846 | 3rd lowest of 15 · 68% of median | 462 | 47 | 39.8 |
| 2021 | 1,379 | 13th lowest of 15 · 111% of median | 327 | 68 | 33.1 |
| 2022 | 1,070 | 4th lowest of 15 · 86% of median | 1,372 | 39 | 96.3 |
| 2023 | 1,812 | 15th lowest of 15 · 145% of median | 4,591 | 58 | 87.0 |
| 2024 | 1,577 | 14th lowest of 15 · 126% of median | 1,207 | 73 | 82.2 |
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.