Sheep Creek Lake
Daggett County, UtahView mapDirections
Nutrients and algae sit mid-range for this region.
↓ down from A at the last regrade
- Mesotrophic
- #6 of 7 in the county
- 20 ft max depth
- Public access
- Limited data
Sheep Creek Lake in Daggett County, Utah has a water quality grade of C (Fair). Water clarity: 10.3 ft visibility. Phosphorus: 18.7 µg/L. Chlorophyll-a (algae): 3 µg/L.
- Clarity
- 10.3 ft
- Max depth
- ~20 ft est.
- Type
- Mesotrophic
- Phosphorus
- 18.7 µg/L
- Chlorophyll-a
- 3 µg/L
- Trend
- ↓ Declining
- Public access
- Yes
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Watch Sheep Creek Lake’s letter
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Sheep Creek Lake is a mesotrophic lake in Daggett County, Utah with an estimated average depth of about 20 feet. Water quality is graded C based on 1 sampling years through 2023. Overall water quality is declining over recent sampling years. Limited fish-species data available. Public access is available with 1 public boat landing. Compared to the 6 other monitored lakes in Daggett County, Sheep Creek Lake ranks #6 for water quality.
Source: EPA Water Quality Portal sampling records, Utah DWQ, last sampled 2023-08-15. Grade methodology: LakeQuality methodology.
What Sheep Creek Lake is good for
From access and monitoring records, not editorial picks.
- Clear water10.3 ft of visibility
- Boat launch1 documented ramp
Swimming Safety
Grade onlyLimited data
Based on clarity and algae grades from past sampling — we do not hold live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
The C is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
Water Quality Grade: C (Fair)
Good clarity, visible to about 10.3 ft. Phosphorus 18.7 µg/L. Chlorophyll-a 3 µg/L. TSI 44. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 10.3 ft | Not graded |
| Phosphorus | 18.7 µg/L | Not graded |
| Chlorophyll-a (Algae) | 3 µg/L | Fair |
| Trophic State Index (TSI) | 44 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | ~20 ft est. |
| Average Depth | ~13 ft est. |
| Public Access | Yes |
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Utah has not published bathymetry for Sheep Creek Lake.
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.
Recreation & Access
- Sheep Creek LakePublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Sheep Creek Lake
Water Quality Trend: ↓ Declining
Based on 3 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | → Stable | -0.035 m/yr | 3 |
| Chlorophyll-a | ↓ Declining | +0.2 µg/L/yr | 3 |
Reservoir Info (USACE NID)
Sheep Creek Lake is a man-made reservoir impounded by the Sheep Creek (completed 1958), built primarily for recreation on the Sheep Creek; earth-type dam, 20 ft tall and 1,905 ft long.
- Normal storage
- 760 ac-ft
- Max storage
- 920 ac-ft
- Drainage area
- 1 sq mi
- Hazard class
- Significant
- Owner
- DIVISION OF WILDLIFE RESOURCES
Source: USACE National Inventory of Dams, NID ID UT00273 · Operator website
County Ranking
Ranked #6 of 7 lakes in Daggett County
Nearby Lakes With Higher Grades
Sheep Creek Lake holds Grade C. 2 nearby lakes hold higher nutrient-and-algae grades — useful for a swim day, not a reason to skip lodging here.
Nearby Lakes in Daggett County
Frequently asked questions about Sheep Creek Lake
Where is Sheep Creek Lake?
- Sheep Creek Lake is a lake in Daggett County, Utah. LakeQuality grades it C for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Sheep Creek Lake?
- Sheep Creek Lake in Daggett County, Utah has a water quality grade of C (Fair). Water clarity: 10.3 ft visibility. Phosphorus: 18.7 µg/L. Chlorophyll-a (algae): 3 µg/L.
Is Sheep Creek Lake safe to swim in?
- The C is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
How deep is Sheep Creek Lake?
- No published bathymetric survey covers Sheep Creek Lake, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 20 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate.
Are there boat ramps on Sheep Creek Lake?
- Sheep Creek Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Sheep Creek Lake. Public access is listed as yes.
Explore Sheep Creek Lake across LakeQuality
More Utah Lake Rankings
Other Grade C Lakes in Utah
Mesotrophic Lakes in Utah
Where this data comes from
9 measurements from 1 monitoring station, 2019–2023. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Utah Department Of Environmental Quality
UTAHDWQ_WQX9 samples · 2019–2023
Analytical methods
- Field Measurements
- Phosphorus by Colorimetry
- 10200 H ~ Chlorophyll a-b-c Determination
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)
Named boat-access points from the USGS National Boat Ramps inventory