Is there a noise restriction for boats on the Colorado River?
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Motorized watercraft operated on state waterways must be equipped with an effective device or devices to prevent excessive noise, unless the watercraft is competing in an approved race or has been issued a race testing permit from the Arizona Game and Fish Department. No watercraft may be operated in a manner that causes it to emit a sound level in excess of 86 decibels on the standard "A" scale when measured from a distance of 50 feet or more. For more boating FAQ see: http://www.coloradoriverinfo.com/watercraft/boatingsafetyfaq/
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Yes. An effective muffling system is required for the exhaust of each engine. Any boat operated on the waters of Colorado must be muffled with a permanently installed muffler or similar device to effectively reduce noise. Specifically: No person shall operate a vessel in Colorado that emits a sound level in excess of 86 decibels on "A" weighted scale when measured from a distance of 50 feet or more from the vessel. In general, do not modify your factory exhaust if the result makes it louder! Loud boat noise not only bothers other operators and users of the waterways, it can also disrupt peace ashore because of sound's ability to travel great distances over water. Excessive noise can also prevent a boat operator from hearing other boats' sound signals and warnings and can prevent you from hearing approaching law or rescue personnel. http://www.boatus.org/onlinecourse/statelaws/Colorado.html
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