The city says an overpopulation of deer is hurting the preserve's ecosystem.
Officials with Bloomington Parks & Recreation are set for a deer cull, which could begin this week.
Officials in Bloomington say they're waiting for a contractor to schedule the planned deer cull in a city nature preserve.
Some residents question whether the hunt is necessary and have called for a deer count before bringing sharpshooters to the area.
Griffy Lake will be closed to boating for two days while herbicides are applied to control for Eurasian watermilfoil.
DNR District 5 Fish Management Biologist Dave Kittaka says large numbers of common carp — which grow quickly — can ruin a fishery.
The season's conditions weren't right for an efficient deer cull.
The group BANIDS has proposed an ordinance that would ban bow hunting within the city limits and place a two year delay on the deer sharpshoot at Griffy Lake.
Mayor Mark Kruzan refused last week to sign an ordinance that would have allowed sharpshooting in Griffy Nature Preserve.
Thousands of fish continue to be pumped into the waters at Griffy Lake.