Blacktail Dam Lake vs Epping-Springbrook Dam-Deepest Lake
Water quality, depth, fish species, and recreation comparison.
Blacktail Dam Lake has a higher water quality grade (B, Good) than Epping-Springbrook Dam-Deepest Lake (D, Poor). Both are in Williams County, Wisconsin.
Both Blacktail Dam Lake and Epping-Springbrook Dam-Deepest Lake sit in North Dakota. A same-state comparison strips out the state-level water-quality regime as a variable: any grade differences here are about the lakes themselves, not the agencies grading them. Blacktail Dam Lake (B) is materially cleaner than Epping-Springbrook Dam-Deepest Lake (D). A gap that wide is unlikely to close in a single year of remediation work; it reflects multi-decade differences in the lakes themselves.
For a recreational visitor, the wider grade gap is decisive — Blacktail Dam Lake is the better water-quality choice. For a researcher, the gap is the interesting part: what is different about the two watersheds, and which of those differences is mutable?
Blacktail Dam Lake
Moderate clarity, visible to about 7.2 ft.
Epping-Springbrook Dam-Deepest Lake
Murky, only visible to about 4.9 ft.
Side-by-Side Metrics
| Metric | Blacktail Dam Lake | Epping-Springbrook Dam-Deepest Lake |
|---|---|---|
| Overall Grade | B (Good) | D (Poor) |
| Water Clarity | 7.2 ft | 4.9 ft |
| Phosphorus | No data | No data |
| Chlorophyll-a (Algae) | 8.6 µg/L | 21.3 µg/L |
| Maximum Depth | - | - |
| Surface Area | 158 acres | 148 acres |
| Public Access | Unknown | Unknown |
| Fish Species | 0 | 0 |
| Trophic State | eutrophic | eutrophic |
Bold value = better for that metric (lower phosphorus / chlorophyll = cleaner; higher Secchi / depth / species count = better).
Verdict
Blacktail Dam Lake wins on overall water quality with a Grade B versus Epping-Springbrook Dam-Deepest Lake's Grade D. Water clarity: 7.2 ft vs 4.9 ft. For fishing diversity, Blacktail Dam Lake also leads with 0 species.