The state has fined Penfield-based Dolomite Products Company $135,000 for last September's blasting mistake at its Penfield Quarry.
The explosion sent 22 rocks into a town park a quarter mile away.
It resulted in substantial damage to a playground, a pickleball court, and a vehicle.
There were people in the park at the time, but no one was hurt.
Part of the fine will be suspended if Dolomite adheres to some conditions, including updating the blasting plans and safety protocols at all eight of its quarries