Fabricated/manufactured bridge, culvert, and highway structural products consist of steel bridge beam/girders; prestressed concrete bridge girders; bridge bearings (mechanical and high-load multi-rotational); bridge expansion joints (modular bridge expansion and finger joints); bridge railings; steel highway structures (cantilever, truss, dynamic message sign, traffic signal mast arm & pole, and bridge mounted signs); spun concrete poles; culverts; noise walls; mechanically stabilized earth wall panels; and precast concrete bridge element systems. Great Lakes and Great Times: Michigan boasts four Great Lakes, 11,000 inland lakes, 36,000 miles of rivers and streams, 20 million acres of forests, 100 state and national parks and recreation areas, 1,300 miles of bike trails, 6,500 miles of snowmobile trails, the second-most ski areas in the nation, 650 public golf courses, 600 campgrounds, and an international dark-sky park-just for starters.