Tag Archives: underground systems

Oil pipeline explosion kills 27 in central Mexico – Wikinews, the free news source

The explosion of an oil pipeline in San Martín Texmelucan de Labastida in central Mexico has killed at least 27 individuals and injured 56 others. Twelve of the dead are children. Over 100 homes were damaged and at least 30 of them were destroyed. The explosion had an estimated blast radius of three miles.

Describing exploding gas tanks that flew through the air, Carlos Hipolito, who fled the scene with approximately 60 relatives, described the incident to Milenio Television as a “catastrophe”. Living ten blocks from where the explosion occurred, 58-year-old Jose Luis Chavez explained that he had heard a minimum of two loud explosions and witnessed flames rising over 10 meters (30 feet) into the air.

It is thought that at the Petróleos Mexicanos (Pemex) pumping station where the incident occurred, a gang of criminals were attempting to illegally tap crude oil from the pipeline when they punctured it. Valentin Meneses, Puebla state interior secretary, stated: “They lost control because of the high pressure with which the fuel exits the pipeline.”

Pemex has explained that the theft of oil from the pipelines causes them to lose hundreds of millions of dollars every year. Juan José Suárez Coppel, the head of the company, stated that the pipeline section near to the location of the blast was tapped illegally on 60 occasions. He also reported that across Mexico, 550 cases of illegal tapping had occurred.

Expressing his condolences to the families of those that had died because of this incident, Mexican president Felipe Calderon stated that the federal government is to launch an investigation to try to establish the identities of the offenders and apprehend them.

via Oil pipeline explosion kills 27 in central Mexico – Wikinews, the free news source.

Progress in Manhattan underground rail link

MTA Tunnel Progress - East Side Access - as of June, 2008

MTA Tunnel Progress - East Side Access - as of June, 2008

New York City’s Metropolitan Transportation Authority (MTA) has announced great progress in its “East Side Access” project. In less than a year – two tunnel boring machines have dug tunnels of 5,421 feet and 3,705 feet. The longer tunnel is over a mile long – and by public-works standards, that seems pretty fast. Worth remembering if we need to build shelters, or more mass transit, or pneumatic mail or package delivery systems. The Times has a brilliant 360-degree panoramic image by Raymond McCrea Jones and Gabriel Dance, and other outstanding still images by Ozier Muhammad. From the Times’ print coverage by William Neuman,  19 Stories Below Manhattan, a 640-Ton Machine Drills a New Train Tunnel; note the discrepancy in reported progress between the number provided to Neuman and the figures in the MTA’s diagram, retrieved from their website on 19 July:

“No windshield? Don’t need one,” said the driver (or operator, as he prefers), Anthony Spinoso.

Over several months he has driven the machine 7,700 feet, from a spot deep under Second Avenue and 63rd Street, through the bedrock, to the depths beneath Grand Central Terminal, where the tunnel he has helped dig will someday bring Long Island Rail Road trains to the East Side of Manhattan.

Now he is backing the machine up several hundred feet to a point where it will begin boring a parallel tunnel. Another thing that Mr. Spinoso does not have is a steering wheel. Instead, he guides the movement of the machine with buttons in front of him, striving to hold a green dot (his machine) on the computer screen at the center of a narrow yellow line that represents his programmed course. He must keep the 22-foot-tall, 360-foot-long behemoth on track without varying more than 2 inches in any direction.

“You just push the buttons, it’s like a video game,” said Edward Kennedy, an engineer helping to supervise the work. “The guy has a screen with a yellow line on it, the yellow brick road. All he has to do is keep on the yellow brick road.”

The digging began last fall for the new Long Island Rail Road tunnels – there will ultimately be eight tunnel sections feeding into an immense new station below Grand Central. There are two machines working simultaneously on separate tunnel sections (the second one, which started later, has reached 48th Street). They can cut through 100 feet of rock a day but often move much slower. The tunneling and the excavation of a huge cavern under Grand Central to house the new station are expected to be completed in 2012, but the entire project will not be finished until at least 2015.

The boring is being done for the Metropolitan Transportation Authority by Dragados Judlau, a joint venture of large construction firms. The cost of the tunneling is $428 million, but the entire project, which includes building out the station and laying the tracks, is expected to cost $7.2 billion. The new tunnels will connect to an existing tunnel under the East River and from there (via more tunneling) to Long Island Rail Road tracks in Queens.

[Emphasis (bold/red) supplied.]

Cf. data in MTA diagram, supra; the two subtotals in the MTA diagram total, according to our calculations, 9,126 feet. This may be no more than a minor error, or a question of dating – as the general progress seems swift, at least by New York standards. (Note that, nearly seven years after the 9/11 attacks, we’ve not agreed on a plan, much less completed one).

Other Resources:

MTA Capital Construction – East Side Access

Wikipedia entry on MTA East Side Access project