Briggs Lake
Logan County, Kentucky18 acresView mapDirections
Nutrients and algae sit mid-range for this region.
- Eutrophic
- Impaired · Nutrients (phosphorus, nitrogen)
- #2 of 3 in the county
- Public access
- Limited data
Briggs Lake in Logan County, Kentucky has a water quality grade of C (Fair). Phosphorus: 32.8 µg/L. Surface area: 17.7 acres.
- Area
- 18 acres
- Type
- Eutrophic
- Phosphorus
- 32.8 µg/L
- Trend
- ↓ Declining
- Public access
- Yes
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Watch Briggs Lake’s letter
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Briggs Lake is a 18-acre productive, nutrient-rich eutrophic lake in Logan County, Kentucky. Water quality is graded C based on 1 sampling years through 2019. 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 2 other monitored lakes in Logan County, Briggs Lake ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, KY DOW, last sampled 2019-09-12. Grade methodology: LakeQuality methodology.
What Briggs Lake is good for
From access and monitoring records, not editorial picks.
- 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. Briggs Lake is listed impaired under Clean Water Act §303(d) (IR 5) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.
Water Quality Grade: C (Fair)
No clarity data. Phosphorus 32.8 µg/L. TSI 54. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 32.8 µg/L | Fair |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 54 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 18 acres |
| Public Access | Yes |
No bathymetric survey has been published for Briggs Lake, so its depth is not documented here.
Recreation & Access
- Briggs LakePublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Briggs Lake
Water Quality Trend: ↓ Declining
Based on 2 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Phosphorus | ↓ Declining | +5.23 µg/L/yr | 2 |
Reservoir Info (USACE NID)
Briggs Lake is a man-made reservoir impounded by the Briggs Lake Dam (completed 1945), built primarily for recreation on the Mud River; earth-type dam, 28 ft tall and 300 ft long.
- Surface area
- 17.7 ac
- Normal storage
- 190.7 ac-ft
- Max storage
- 385 ac-ft
- Drainage area
- 0.4 sq mi
- Hazard class
- Low
- Owner
- COMMONWEALTH OF KENTUCKY
Source: USACE National Inventory of Dams, NID ID KY00164 · Operator website
EPA Impairment Status
Briggs Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
Source: EPA ATTAINS assessment unit KY-320 · Official waterbody report
County Ranking
Ranked #2 of 3 lakes in Logan County
Nearby Lakes in Logan County
Frequently asked questions about Briggs Lake
Where is Briggs Lake?
- Briggs Lake is a lake in Logan County, Kentucky. LakeQuality grades it C for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Briggs Lake?
- Briggs Lake in Logan County, Kentucky has a water quality grade of C (Fair). Phosphorus: 32.8 µg/L. Surface area: 17.7 acres.
Is Briggs Lake safe to swim in?
- The C is nutrients and algae, not a swimming clearance. Briggs Lake is listed impaired under Clean Water Act §303(d) (IR 5) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.
Are there boat ramps on Briggs Lake?
- Briggs Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Briggs Lake. Public access is listed as yes.
Explore Briggs Lake across LakeQuality
More Kentucky Lake Rankings
Other Grade C Lakes in Kentucky
Eutrophic Lakes in Kentucky
Where this data comes from
12 measurements from 2 monitoring stations, 2016–2019. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- KY WQX
21KY_WQX12 samples · 2016–2019
Analytical methods
- Phosphorus by Colorimetry
- Total Phosphorus After Block Digestion
Monitoring station identifiers (2)
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
Impairment status from EPA ATTAINS 303(d) database
Named boat-access points from the USGS National Boat Ramps inventory