Upper Sunshine Reservoir Lpd
Park County, Wyoming1,156 acresView mapDirections
Wyoming DEQ publishes the water-quality measurements for Upper Sunshine Reservoir Lpd. Here is what has been measured.
- Limited data
Upper Sunshine Reservoir Lpd in Park County, Wyoming has water-quality measurements published by Wyoming DEQ, shown here as reported. Phosphorus: 15 µg/L. Surface area: 1156 acres.
Upper Sunshine Reservoir Lpd is a 1,156-acre lake in Park County, Wyoming. Overall water quality is improving over recent sampling years.
Source: EPA Water Quality Portal sampling records, Wyoming DEQ, last sampled 2015-09-28. Methodology: how these readings are compared.
What Upper Sunshine Reservoir Lpd is good for
From access and monitoring records, not editorial picks.
- Big water1,156 acres
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Upper Sunshine Reservoir Lpd is safe to swim in today is a call for the Wyoming Department of Environmental Quality and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Upper Sunshine Reservoir Lpd
These are the measurements Wyoming DEQ publishes for Upper Sunshine Reservoir Lpd, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data. Phosphorus 15 µg/L. TSI 43.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | No reading How deep a black-and-white disk stays visible from the surface. Higher is clearer. | |
| Total phosphorus | 15µg/L | Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. |
| Chlorophyll-a (algae) | No reading The green pigment in algae — a direct measure of how much algae is in the water. | |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 43 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Upper Sunshine Reservoir Lpd
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
1,156 acres
No bathymetric survey has been published for Upper Sunshine Reservoir Lpd, so its depth is not documented here.
Stays via Stay22
Stays near Upper Sunshine Reservoir Lpd
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Fishing Upper Sunshine Reservoir Lpd
Water quality readings over time
2 seasons of samples on record (2014–2015). Calling a direction takes at least 4 years of the same measurement.
Phosphorus
Improving-10 µg/L/yr2 years
Reservoir Info (USACE NID)
Upper Sunshine Reservoir Lpd is a man-made reservoir impounded by the Upper Sunshine (completed 1942), built primarily for irrigation on the Greybull River (Offstream); earth-type dam, 160 ft tall and 1,150 ft long.
- Surface area
- 1,156 ac
- Normal storage
- 52,987 ac-ft
- Max storage
- 65,100 ac-ft
- Drainage area
- 12.8 sq mi
- Hazard class
- High
- Owner
- GREYBULL VALLEY IRRIGATION DISTRICT
Source: USACE National Inventory of Dams, NID ID WY01097 · Operator website · Matched by proximity (0.2 km)
Nearby Lakes in Park County
Frequently asked questions about Upper Sunshine Reservoir Lpd
Where is Upper Sunshine Reservoir Lpd?
- Upper Sunshine Reservoir Lpd is a lake in Park County, Wyoming. Its water-quality measurements are published by Wyoming DEQ and shown on this page as reported.
What is the water quality of Upper Sunshine Reservoir Lpd?
- Upper Sunshine Reservoir Lpd in Park County, Wyoming has water-quality measurements published by Wyoming DEQ, shown here as reported. Phosphorus: 15 µg/L. Surface area: 1156 acres.
Is Upper Sunshine Reservoir Lpd safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
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Where this data comes from
6 measurements from 1 monitoring station, 2014–2015. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- State of Wyoming Department of Environmental Quality Watershed Program
WYDEQ_WATERSHED6 samples · 2014–2015
Analytical methods
- Total Phosphorus After Block Digestion
Monitoring station identifiers (1)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.