The Oregon City Bridge (Part I)

The Oregon City Bridge, which spans the Willamette River between Oregon City and West Linn, OR, served the community for nearly a century before recently getting a major overhaul.

The Danger of Fallouts in Overhead Shooting

The volume of shotcrete required to cover an area of only 3 ft2 (0.3 m2) with a 4 in. (100 mm) thickness would typically weigh approximately 140 lb (64 kg), a weight that?if dropped from a height of 10 ft (3 m)?would seriously endanger the life of any individual standing below it.