Complex sentence: The Washington State Department of Transportation is a pioneer in designing and building floating bridges: it holds the record for the first and the longest floating bridges, and four of the 11 permanent floating bridges in the world are in the Puget Sound region.
Split into simpler sentences: The Washington State Department of Transportation is a pioneer in designing and building floating bridges, and holds the record for the first and the longest floating bridges. Four of the 11 permanent floating bridges in the world are in the Puget Sound region.