Buy this domain.
Minneapolis Bridge Collapse Investigators Eye De-Icing Chemical | cialis online

Minneapolis Bridge Collapse Investigators Eye De-Icing Chemical

AddThis Social Bookmark Button

The investigation into the Minneapolis Bridge collapse is focusing on several key areas that could have played a part in the tragedy that left 13 people dead and 100 others injured. Yesterday, the National Transportation Safety Board (NTSB) said that investigators were looking at the corrosive properties of de-icing chemicals used on the I-35 W Bridge. Other news reports said that past inspections had raised concerns about a large build up of pigeon dung on the Minneapolis Bridge that could endanger its structural integrity.

Yesterday, the NTSB issued an update on its investigation into the Minneapolis Bridge collapse. The investigators said that they will be examining the de-icing system used on the bridge to determine if the chemicals that were part of that system might have had corrosive properties. According to the Minneapolis Star Tribune, dangerous black ice was a constant problem on the I-35 W Bridge in the winter because of mist from the nearby St. Anthony Falls. The Minnesota Department of Transportation (MNDOT) had installed temperature and precipitation-activated nozzles on the bridge to keep it free of ice. The nozzles sprayed a chemical called C7 onto the bridge. C7 is a liquid potassium acetate made by Cryotech. C7 contains no nitrogen or chlorides, and is considered safer than other de-icing chemicals.

But according to the Minneapolis Star Tribune, MNDOT discovered that C7 reacted with galvanized metal when some was accidentally spilled onto a grate. In 2005, the manufacturer issued an alert warning that C7 would react with zinc. Zinc is used in galvanized steel. But Cryotech said that the reaction was slow, and did not occur with normal use. According to the Star Tribune, MNDOT initiated an investigation in order to see if C7 had caused any significant deterioration on the Minneapolis Bridge. That investigation concluded that the galvanized steel on the bridge was thick enough to withstand the C7 reaction.

The NTSB is also said to be examining a possible design flaw in the steel gusset plates which bound the I 35-W Bridge’s trusses together. The NTSB is also taking a hard look at the construction that was being done on the Minneapolis Bridge when it collapsed. Yesterday, investigators said that they had determined that the weight from construction on the bridge to be around 575,000 lbs.

Other media outlets reported yesterday that in 1989, MNDOT inspectors had begun to raise concerns about the build up of pigeon droppings on the I-35 W Bridge. Pigeon dung contains large amounts of ammonia and acids, and if not washed away, it can become quite corrosive. Over the long term, it can weaken structures like the Minneapolis Bridge. In 1996, openings on the I-35 W Bridge’s beams were covered with screens in an attempt to keep the birds from nesting there. Pigeon droppings are a common problem on bridges, because the birds are naturally drawn to cliff-like structures.

The I-35 W Bridge collapsed on August 1, at 6:05 p.m. It was the height of Minneapolis’ evening rush hour, and cars were lined up bumper-to- bumper across the span. At least 88 vehicles and hundreds of people fell 60 feet into the Mississippi River below. It would be nearly three weeks before the final victim of the Minneapolis Bridge Collapse was pulled from the river.

« »

Leave a Reply

You must be logged in to post a comment.




Defective Johnson & Johnson Depuy ASR Hip Implants

The Johnson & Johnson Depuy ASR Hip Implant is suppose to last 15 years, but can fail in only a few years after surgery. Victims with faulty hip implants endure excruciating pain, pain in the groin, death of tissue in the hip joint and loss of surrounding bone. GET ALL THE FACTS NOW! CLICK HERE!

CAT Scans Radiation Exposure

If you had a CT or CAT scan and now have a band of missing hair, skin reddening or any other problems possibly related to a radiation overdose, you may have been exposed to much radiation due to incorrect settings on these machines. CONTACT US TODAY!

Water Contamination From Fracking

Hydraulic Fracturing of Fracking a way to extract natural gas from shale is contaminating water supplies across the country. Get the facts to keep your drinking water safe for your family.

Overexposure to PCBs

Many people unknowingly have been exposed to high levels of PCBs. Recently 3 schools in NY City were found to have dangerous levels of PCBs throughout. Many workers for Monsanto, General Electric, and Westinghouse were exposed to high levels of PCBs. PCBs are a dangerous toxic substance that doesn't break down easily and can cause chloracne, bleeding and neurological disorders, liver damage, spontaneous abortions, malformed babies, cancer, and death. GET THE FACTS!
Overexposure to

Great Photography

Tallis Photo, the number one photographer for great corporate, wedding, and special occasion photos. CONTACT US TODAY!

Poligrip Lawsuit

Super Poligrip or Fixodent May Cause Nerve Damage. 800-LAW-INFO

Personal Injury Lawyer Nassau County

If you or someone you love was injured CONTACT US TODAY!

Nursing Home Blog

When a loved one is abused at a nursing home, it is time to take action. STOP nursing home abuse!

Car Accident Lawyer Nassau County

If you or someone you love was injured in an auto accident CONTACT US TODAY!

Suffolk County Auto Accident Lawyer

If you or someone you love was injured in an auto accident in Suffolk County, NY CONTACT US TODAY!

Don't Be Denied Veterans Benefits

If you or someone you love was denied veterans benefits CONTACT US TODAY!

Oil Rig Spills Lawyer

Oil Rig Spills harm the environment and cause heavy losses to coastal game and fishing industries, as well as a loss of waterway usage, resulting in a loss of income to individuals and businesses, and a loss of beach front usage. Don't let a spill cause you harm, CONTACT US TODAY!

Whistle Blower

Stand up and say what you think is right. See something, say something.