Alexander Lake vs Spirit River Flowage Lake
Water quality, depth, fish species, and recreation comparison.
Alexander Lake has a higher water quality grade (C, Fair) than Spirit River Flowage Lake (D, Poor). Both are in Lincoln County, Wisconsin.
Alexander Lake and Spirit River Flowage Lake are both in Wisconsin — 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. The grades are close: Alexander Lake (C) and Spirit River Flowage Lake (D) are within one letter of each other on the LakeGrade rubric. The per-parameter sub-grades below will show where the small differences actually live.
With grades this close, the choice between the two lakes turns on non-water-quality factors: depth, fish species, public access, distance from home. The per-lake pages below cover all of those.
Alexander Lake
Murky, only visible to about 4 ft.
Spirit River Flowage Lake
Very murky, less than 3 ft of visibility.
Side-by-Side Metrics
| Metric | Alexander Lake | Spirit River Flowage Lake |
|---|---|---|
| Overall Grade | C (Fair) | D (Poor) |
| Water Clarity | 4 ft | 3 ft |
| Phosphorus | 46.2 µg/L | 49.1 µg/L |
| Chlorophyll-a (Algae) | No data | No data |
| Maximum Depth | - | - |
| Surface Area | 803 acres | 1.7K 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
Alexander Lake wins on overall water quality with a Grade C versus Spirit River Flowage Lake's Grade D. Water clarity: 4 ft vs 3 ft. For fishing diversity, Alexander Lake also leads with 0 species.