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As part of an I-75 construction/modernization project, a tunnel-boring machine (TBM) was used to bore and construct a 14-foot diameter sewer tunnel approximately 90-feet below the surface. When soil conditions required the removal and replacement of the TBM--still 90-feet below the surface--some of the most difficult and challenging work of the modernization began. In order to remove and replace the TBM, the massive Recovery Shaft Project was undertaken, beginning by boring 56 cylindrical holes (54 holes, 5-feet in diameter, and two holes, 7-feet in diameter) in a circular pattern, down 155 feet. As they were bored, the holes were filled with reinforced concrete, forming a circular wall 55-feet in diameter. Next, a power shovel dug its way 90-feet down inside the circular wall, creating the recovery shaft. Currently, the new TBM (diameter, 17 feet) is being assembled and will be lowered into the shaft by the red gantry crane. As you look at this panorama of the site and shaft, the monumental scope, scale, difficulty, and complicated nature of this project becomes evident. Many thanks to Tony, the site superintendent, and the Jay Dee crew for their cooperation with this panorama project.
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The United States is one of the most diverse countries on earth, jam packed full of amazing sights from St. Patrick's cathedral in New York to Mount Hollywood California.The Northeast region is where it all started. Thirteen British colonies fought the American Revolution from here and won their independence in the first successful colonial rebellion in history. Take a look at these rolling hills carpeted with foliage along the Hudson river here, north of New York City.The American south is known for its polite people and slow pace of life. Probably they move slowly because it's so hot. Southerners tend not to trust people from "up north" because they talk too fast. Here's a cemetery in Georgia where you can find graves of soldiers from the Civil War.The West Coast is sort of like another country that exists to make the east coast jealous. California is full of nothing but grizzly old miners digging for gold, a few gangster rappers, and then actors. That is to say, the West Coast functions as the imagination of the US, like a weird little brother who teases everybody then gets famous for making freaky art.The central part of the country is flat farmland all the way over to the Rocky Mountains. Up in the northwest corner you can find creative people in places like Portland and Seattle, along with awesome snowboarding and good beer. Text by Steve Smith.