Holcombe Flowage Lake

Holcombe Flowage Lake sits at a C on the grading scale — not impaired, not pristine, with summer measurements that vary year to year. With clarity and phosphorus scored, the sub-grades cluster within a letter of each other, pointing to stable conditions rather than one specific stressor.

At a TSI of 59, Holcombe Flowage Lake 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. With 4,300 acres of surface and partial shoreline records, Holcombe Flowage Lake is a large water by Wisconsin standards — recreational pressure is spread across a long shoreline. Within Chippewa County's 15 graded lakes, Holcombe Flowage Lake ranks 10 — below the local median, though not at the bottom.

Holcombe Flowage Lake has no invasive species recorded in Wisconsin state databases as of 2025, though prevention practices still apply at all access points. The state fisheries records do not list documented species for Holcombe Flowage Lake, which usually reflects a lack of formal fisheries survey work rather than an empty lake. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.