Castle Rock Dam Lake vs North Lemmon Lake
Water quality, depth, fish species, and recreation comparison.
North Lemmon Lake has a higher water quality grade (B, Good) than Castle Rock Dam Lake (D, Poor). Both are in Wisconsin.
Castle Rock Dam Lake and North Lemmon Lake are both in North Dakota — a same-state head-to-head where the comparison comes down to lake-specific differences in depth, watershed, and monitoring history rather than the broader state-level water-quality regime. North Lemmon Lake (B) is materially cleaner than Castle Rock Dam 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 — North Lemmon 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?
Castle Rock Dam Lake
Murky, only visible to about 3.8 ft.
North Lemmon Lake
Murky, only visible to about 5.7 ft.
Side-by-Side Metrics
| Metric | Castle Rock Dam Lake | North Lemmon Lake |
|---|---|---|
| Overall Grade | D (Poor) | B (Good) |
| Water Clarity | 3.8 ft | 5.7 ft |
| Phosphorus | No data | No data |
| Chlorophyll-a (Algae) | 24.3 µg/L | 4.8 µg/L |
| Maximum Depth | - | - |
| Surface Area | 14.2 acres | 49.8 acres |
| Public Access | Unknown | Unknown |
| Fish Species | 0 | 0 |
| Trophic State | eutrophic | mesotrophic |
Bold value = better for that metric (lower phosphorus / chlorophyll = cleaner; higher Secchi / depth / species count = better).
Verdict
North Lemmon Lake wins on overall water quality with a Grade B versus Castle Rock Dam Lake's Grade D. Water clarity: 5.7 ft vs 3.8 ft. For fishing diversity, North Lemmon Lake also leads with 0 species.