Beaver Lake is a 953-acre productive, nutrient-rich eutrophic lake in Logan County, North Dakota with a maximum depth of 8 feet (6-foot average). Water quality is graded C based on 2 sampling years through 2024. The lake supports 4 documented fish species including Northern Pike, Yellow Perch, and Common Carp. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, North Dakota DNR, last sampled 2024-10-01. Grade methodology: LakeGrade methodology.
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Swimming Safety
Generally safe for swimming, moderate water quality
Water Quality Grade: C, Fair
Very murky, less than 1.4 ft of visibility. Chlorophyll-a: 4.8 µg/L. Trophic State Index: 59.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.4 ft | F |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | 4.8 µg/L | A |
| Trophic State Index (TSI) | 59 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 7.9 ft |
| Average Depth | 5.7 ft |
| Surface Area | 953 acres |
| Shoreline Length | 9.9 mi |
| Public Access | Yes |
Where to stay near Beaver Lake
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Fish Species
Click a species to see every graded lake where it is documented.
Fishing Beaver Lake
Recreation & Access
Location
County Ranking
Ranked #1 of 1 lakes in Logan County
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High nutrients, frequent algae, reduced clarity
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More records, surveys & data sources
Reservoir Info (USACE NID)
Beaver Lake is a man-made reservoir impounded by the Beaver Lake Dam (completed 1934), built primarily for recreation on the Beaver Creek; earth-type dam, 10 ft tall and 562 ft long.
- Surface area
- 953.1 ac
- Normal storage
- 5,319 ac-ft
- Max storage
- 5,319 ac-ft
- Drainage area
- 179 sq mi
- Hazard class
- Low
- Owner
- Logan County WRB
Source: USACE National Inventory of Dams, NID ID ND00368 · Operator website
EPA Impairment Status
Beaver Lake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).
Causes of impairment
Source: EPA ATTAINS assessment unit ND-10130104-001-L_00 · Official waterbody report
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth is a modeled estimate.
Data Sources
Water quality data from the EPA Water Quality Portal
Impairment status from EPA ATTAINS 303(d) database
Lake size & watershed from HydroLAKES (HydroSHEDS)
Grading methodology based on Metropolitan Council standards
Depth, fish, and access data from North Dakota Game & Fish
Public boat-access points from the USGS National Boat Ramps inventory
Most recent sample: 2024-10-01
Monitoring stations: 1