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The Washburn Tunnel may be a multilane underwater motor-vehicle tunnel connecting mineral Park and Pasadena, 2 suburbs of Houston, Texas. Completed in 1950, it travels north-south beneath the Houston Ship Channel. It absolutely was named once Harris County, Texas Auditor Harry L. Washburn. It’s largest and initial fee transport tunnel within the Southern us. Merritt Chapman and Scott Corporation of recent York built the $7 million project. First, a trench 90×40 feet had to be mammary gland. Second, these sections had to be fastened into position eighty five feet underwater. Finally, the last touches, like covering the within, were completed.
It is the sole underwater vehicle tunnel presently operative within the state, because the Baytown Tunnel was replaced in 1995 by a bridge. The tunnel consists of one bore, 895 meters (2,909 feet) long, with a six-percent road grade outward from the middle towards every exit. Forced thwartwise ventilation is doubtless provided by 3 automatic high-speed inventor Sturtevant blower fans settled in an exceedingly tower at the north entrance. These fans ar designed to stay the air free from high-levels of carbon monoxide gas.
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