High Bridge - Bridge ID Number?

[NW Mailing List]

Very interesting.  Thank you again for the great information, Harry.

Jeff Hawkins
  ----- Original Message ----- 
  From: NW Mailing List via NW-Mailing-List 
  To: nw-mailing-list at nwhs.org 
  Sent: Wednesday, October 15, 2014 9:52 AM
  Subject: Re: High Bridge - Bridge ID Number?



  Can't speak to the "P-84" symbol, but
  I didn't know Mobil had gone into the
  paint business.  Maybe they have, but
  thought Mobil was in the petroleum 
  industry.

  In the 60s and 70s, environmentalists
  took a pretty strong position against
  blasting lead-based paints off bridges.
  Maintenance of Way forces would spread
  tarps below the bridges to capture the
  paint particles. Then there was the
  problem of disposing of the spent paint. 

  N&W experimented with greasing bridges.
  Results left a lot to be desired.  In
  hot weather, the steel would heat and
  the grease would drip off.  In one
  instance, the paint dripped off the
  Whiskey Run viaduct at Rook Yard 
  (Pittsburgh), landed on the free way to
  the airport and caused motorists to
  skid.

  Maybe Mobil has come up with a petroleum
  product that doesn't drip.  Harry Bundy




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