Lake Pueblo State Park in Colorado installs 'exit only' gates with sensors and spike strips for boaters to leave after hours, starting April 1, due to aquatic nuisance species concerns.

Lake Pueblo State Park in Colorado installs 'exit only' gates to allow boaters to leave after hours starting April 1. The new gates, which resemble railroad-crossing guards, have sensors and spike strips to enable boaters to exit but not enter the lake after closing times. This policy is a response to aquatic nuisance species concerns and comes with new ANS inspection requirements that boaters must follow.