CHEYENNE, Wyo. (AP) — The pricetag of a bill aimed at stopping the spread of invasive mussels to Wyoming has been lowered.

The House gave initial backing to the proposal on Monday. It requires boats and boat trailers entering Wyoming to be inspected for aquatic nuisance species like zebra mussels.

Senate File 71 originally was set to cost $1.7 million but the price has been cut to about $852,000 over two years. The Wyoming Tribune Eagle reports that includes money for signs telling people that it's their responsibility to get their boats inspected.

Zebra mussels and other exotic mussels have been found in reservoirs in Colorado, Utah and Nevada. They breed quickly and can jam up waterworks and hurt fisheries.