Rollins Reservoir
Uinta County, Wyoming200 acresView mapDirections
Not enough samples to grade — no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). No letter yet. Here is what we do have.
- 14 ft max depth
- Limited data
Rollins Reservoir in Uinta County, Wyoming is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 6.2 ft visibility. Phosphorus: 20.8 µg/L. Surface area: 200 acres.
- Clarity
- 6.2 ft
- Max depth
- ~14 ft est.
- Area
- 200 acres
- Phosphorus
- 20.8 µg/L
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Watch Rollins Reservoir’s letter
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Why Rollins Reservoir has no grade
We grade a lake only when the monitoring record supports a letter: at least three phosphorus or chlorophyll-a samples in the last ten years, scored against EPA National Lakes Assessment thresholds for this lake’s ecoregion. For Rollins Reservoir, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). Sampling here has recorded water clarity and phosphorus, but not algae (chlorophyll-a).
Not Rated is not an F. It is EPA Integrated Reporting Category 3 — insufficient information. The water here may be excellent or poor; nobody has measured enough of it to say. Everything below that has been measured is still reported on this page.
Sampling is run by Wyoming DEQ and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Rollins Reservoir is a 200-acre lake in Uinta County, Wyoming with an estimated average depth of about 14 feet.
Source: EPA Water Quality Portal sampling records, Wyoming DEQ, last sampled 2013-09-11. Grade methodology: LakeQuality methodology.
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Check local advisories before you swim.
Water quality measurements for Rollins Reservoir
These readings exist but are not enough for an A–F grade — see why.
Murky, only visible to about 6.2 ft. Phosphorus 20.8 µg/L. TSI 49.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 6.2 ft | Not graded |
| Phosphorus | 20.8 µg/L | Not graded |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 49 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | ~14 ft est. |
| Average Depth | ~9 ft est. |
| Surface Area | 200 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 Rollins Reservoir.
Lake Size & Watershed
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.
Fishing Rollins Reservoir
Reservoir Info (USACE NID)
Rollins Reservoir is a man-made reservoir impounded by the Paterson Lake (completed 1907), built primarily for irrigation on the Blacks Fork River; earth-type dam, 14 ft tall and 1,650 ft long.
- Surface area
- 200 ac
- Normal storage
- 1,237 ac-ft
- Max storage
- 1,649 ac-ft
- Drainage area
- 0 sq mi
- Hazard class
- Significant
- Owner
- JOHN L. & CHERYL EYRE
Source: USACE National Inventory of Dams, NID ID WY01248 · Operator website
Nearby Lakes in Uinta County
Frequently asked questions about Rollins Reservoir
Where is Rollins Reservoir?
- Rollins Reservoir is a lake in Uinta County, Wyoming. LakeQuality has not rated this lake (UNRATED) — no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years).
What is the water quality grade for Rollins Reservoir?
- Rollins Reservoir in Uinta County, Wyoming is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 6.2 ft visibility. Phosphorus: 20.8 µg/L. Surface area: 200 acres.
Is Rollins Reservoir safe to swim in?
- The letter is not a swimming clearance. Check local advisories before you swim.
How deep is Rollins Reservoir?
- No published bathymetric survey covers Rollins Reservoir, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 14 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 200 acres.
Explore Rollins Reservoir across LakeQuality
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Where this data comes from
4 measurements from 1 monitoring station, 2013. 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_WATERSHED4 samples · 2013
Analytical methods
- Secchi
- Total Phosphorus After Block Digestion
Monitoring station identifiers (1)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated and data sources.
Other records on this page
Lake size & watershed from HydroLAKES (HydroSHEDS)