Island Lake Rsvr

Island Lake Rsvr pulls a D on the LakeGrade rubric — phosphorus loading and limited clarity hold it below the Minnesota average. Clarity, phosphorus, and chlorophyll-a all rate similarly, so there is no obvious single lever to pull on watershed management.

At a TSI of 54, Island Lake Rsvr reads as eutrophic — nutrient-rich enough that summer algal growth and reduced clarity are expected, not unusual. The lake's maximum depth is not yet documented in state morphometric records — context for its physical structure remains limited. The lake's surface area is not consistently recorded across state datasets — physical context remains partial. Within the 215 graded lakes of St. Louis County, Island Lake Rsvr sits at rank 197, near the bottom of the county list.

An invasive species record — spiny waterflea — has been logged at Island Lake Rsvr; Minnesota PCA maintains the official infested-waters list. The state fisheries records do not list documented species for Island Lake Rsvr, which usually reflects a lack of formal fisheries survey work rather than an empty lake. A documented public access point at Island Lake Rsvr makes the lake usable for shore fishing, paddle craft, and trailered boats. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.