1866-Chicago: Work begins on the 1st U.S. underwater highway tunnel
Know workplace hazards and how to identify and reduce/eliminate them Be alert! Have a buddy system in place with reliable means of communication and schedule regular check-ins
2015- The Nipigon River Bridge, in Northern Ontario, Canada a cable-stayed bridge, opens after approximately 2 years of construction.
1965- The Gateway arch is completed.
1962- Initial test flight of Boeing 727.
1876- Willis Carrier, inventor of the modern air conditioner, is born.
1867- Dynamite is patented.