Wednesday, August 22, 2007

Poop power

clipped from news.yahoo.com



AP

Experts tie pigeon poop, bridge collapse


By MARTIGA LOHN, Associated Press Writer


ST. PAUL, Minn. - Pounded and strained by heavy traffic and weakened by missing bolts and cracking steel, the failed interstate bridge over the Mississippi River also faced a less obvious enemy: pigeons.

Inspectors began documenting the buildup of pigeon dung on the span near downtown Minneapolis two decades ago. Experts say the corrosive guano deposited all over the Interstate 35W span's framework helped the steel beams rust faster.

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2 comments:

Unknown said...

Birds and their droppings cause millions of dollars of damage each year to property. While it may not be the main factor, bird droppings can be highly corrosive and damaging to metals. Investigators should not rule out that factor, even though it seems far-fetched.

A comprehensive bird control program should be in place at any site where the structure could be threatened by the presence of droppings. Visual scare devices, taste aversions, roost inhibitors, sonic repellers and ultrasonic disrupters are all highly effective in the control of birds, humanely.

Unknown said...

The Bridge collapse was obviously caused by some accelerated structural deterioration that was likely from some corrosive agent. The pigeon droppings left to pile for years can deteriorate steel in addition to carrying diseases and not looking so nice.

This aspect is not commonly known about the pigeons droppings and we won't know for sure soon, or possibly ever whether the bird poop played a pivotal role in this disaster.

The Minnesota DOT could have taken several preventative measures to have controlled the long-term roosting and nesting behaviors of the pigeons by using Bird Netting systems underneath the bridge or Stainless Steel Bird Spikes or even electronic bird dispersal systems that drive birds away from structures.

Other states may now pay closer attention tho detail when it comes to messy pigeons, they can also be deadly.

Joe Seid
Bird-X Inc.
www.bird-x.com
800 662-5021