The bills passed Thursday would lower fees for some dredging projects and let emergency projects bypass a waiting period.
Dredging is the removal of sediments so water is deep enough for boats and barges.
The House passed a bill to let the Michigan Department of Environmental Quality issue emergency permits when property or residents' safety is at risk. Currently, permits can't be issued until after a 20-day objection period.
Another bill would reduce some dredging permit fees from $1,500 to $50.
A bill approved in the Senate would let marinas pay low interest rates for loans for emergency dredging projects.
Each bill now goes to the other chamber for consideration.