Gilbert Pit is located near the city limits of Gilbert MN. This former open pit mine is 254 acres in size and more than 400 feet deep. The city has developed an area for recreation that includes an access, campground, swimming beach and picnic area. The IRRRB stocks yearling rainbow trout annually in this mine pit. Eurasion water milfoil and zebra mussels are present.
Eight species of fish were sampled during the 2014 population assessment. With the exception of rock bass (60% of the catch) the remaining seven species were sampled in numbers below average compared to similar lakes. Bluegill and white sucker are the only species that have been sampled in all six assessments. This is the first assessment where walleye were not sampled.
Two lake trout, the largest measuring 28 inches were sampled. Two smallmouth bass, two northern pike and two yellow perch were sampled. One pumpkinseed was also sampled. Historically these species have been present in low abundances with white sucker showing a slight decline.
- Eurasian Watermilfoil
- Zebra Mussel
Recreational activities such as recreational boating, angling, waterfowl hunting, and diving may spread aquatic invasive species. Some aquatic invasive species can attach to boats, while others can become tangled on propellers, anchor lines, or boat trailers. Many species can survive in bilge water, ballast tanks, and motors or may hide in dirt or sand that clings to nets, buckets, anchors, and waders. Fortunately, completing simple steps can prevent the transport of aquatic invasive species.