Re: Chalk Marks Question

O Fenton Wells

Didn’t know that, Bob thanks for sharing 
Fenton Wells 

On Nov 9, 2018, at 4:46 PM, Brian Carlson via Groups.Io <prrk41361@...> wrote:

We use railroad chalk and keel, the smaller oilier marking material someone asked about, in bridge inspection to make notes on the structure for reference and photos. 
Keel is longer lasting and is sometimes still visible a year later. 

Brian J. Carlson 

On Nov 9, 2018, at 4:31 PM, Bob Chaparro <chiefbobbb@...> wrote:

Chalk used by the railwoads came in very large sticks, 1" in diameter and 4" long.

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