Piedmont Reservoir D
Uinta County, Wyoming55 acresView mapDirections
Wyoming DEQ publishes the water-quality measurements for Piedmont Reservoir D. Here is what has been measured.
- 23 ft max depth
- Limited data
Piedmont Reservoir D in Uinta County, Wyoming has water-quality measurements published by Wyoming DEQ, shown here as reported. Phosphorus: 17.3 µg/L. Surface area: 55 acres.
Piedmont Reservoir D is a 55-acre lake in Uinta County, Wyoming with an estimated average depth of about 23 feet.
Source: EPA Water Quality Portal sampling records, Wyoming DEQ, last sampled 2014-09-23. Methodology: how these readings are compared.
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Piedmont Reservoir D 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 Piedmont Reservoir D
These are the measurements Wyoming DEQ publishes for Piedmont Reservoir D, 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 17.3 µg/L. TSI 45.
| 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 | 17.3µg/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. | 45 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Piedmont Reservoir D
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
~23 ft est.
Surface area
55 acres
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Wyoming has not published bathymetry for Piedmont Reservoir D.
Lake Size & Watershed
Watershed (drainage) area
1 sq mi
HydroLAKES / HydroSHEDS
Shoreline
1.2 mi
HydroLAKES / HydroSHEDS
Elevation
7,287 ft
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth here is modelled, not surveyed — HydroLAKES v1.0 estimates lake depth from surrounding terrain rather than from soundings. Treat it as an approximation, and prefer a state bathymetric survey where one exists.
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Fishing Piedmont Reservoir D
Reservoir Info (USACE NID)
Piedmont Reservoir D is a man-made reservoir impounded by the Piedmont (completed 1902), built primarily for irrigation on the Big Muddy Ck; earth-type dam, 34 ft tall and 549 ft long.
- Surface area
- 55 ac
- Normal storage
- 630 ac-ft
- Max storage
- 840 ac-ft
- Hazard class
- Low
- Owner
- GUILD FAMILY TRUST
Source: USACE National Inventory of Dams, NID ID WY01259 · Operator website · Matched by proximity (0.38 km)
Nearby Lakes in Uinta County
Frequently asked questions about Piedmont Reservoir D
Where is Piedmont Reservoir D?
- Piedmont Reservoir D is a lake in Uinta County, Wyoming. Its water-quality measurements are published by Wyoming DEQ and shown on this page as reported.
What is the water quality of Piedmont Reservoir D?
- Piedmont Reservoir D in Uinta County, Wyoming has water-quality measurements published by Wyoming DEQ, shown here as reported. Phosphorus: 17.3 µg/L. Surface area: 55 acres.
Is Piedmont Reservoir D safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Piedmont Reservoir D?
- No published bathymetric survey covers Piedmont Reservoir D, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 23 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate. The lake covers 55 acres.
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Where this data comes from
3 measurements from 1 monitoring station, 2014. 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_WATERSHED3 samples · 2014
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.
Other records on this page
Lake size & watershed from HydroLAKES (HydroSHEDS)