Bylin Dam Lake
Walsh County, WisconsinLimited DataMesotrophic
Bylin Dam Lake is a 60-acre mesotrophic lake in Walsh County, ND. Water quality is graded C based on 1 sampling years through 2025. Compared to the 1 other monitored lakes in Walsh County, Bylin Dam Lake ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2025-10-22. Grade methodology: LakeGrade methodology.
Swimming Safety
Generally safe for swimming, moderate water quality
Water Quality Grade: C, Fair
Moderate clarity, visible to about 7.2 ft. Trophic State Index: 49.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 7.2 ft | C |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 49 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 59.9 acres |
Location
County Ranking
Ranked #2 of 2 lakes in Walsh County
Cleaner Lakes Within 30 Miles
Bylin Dam Lake holds Grade C. One nearby lake has a higher grade.
See full comparison →Nearby Lakes in Walsh County
More Wisconsin Lake Rankings
Other Grade C Lakes in Wisconsin
Mesotrophic Lakes in Wisconsin
Reservoir Info (USACE NID)
Bylin Dam Lake is a man-made reservoir impounded by the Bylin Dam (completed 1964), built primarily for flood risk reduction on the North Branch Forest River; earth-type dam, 60 ft tall and 760 ft long.
- Surface area
- 59.9 ac
- Normal storage
- 708.1 ac-ft
- Max storage
- 5,850 ac-ft
- Drainage area
- 22.1 sq mi
- Hazard class
- High
- Owner
- Walsh County WRB
All listed purposes: Flood Risk Reduction;Recreation.
Source: USACE National Inventory of Dams, NID ID ND00036 · Operator website
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2025-10-22
Monitoring stations: 1