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ny_4_I87_fhwa_1967_89.jpg

Year:
1967

State:
NY

Inter 1:
I87

Inter 2:
I87

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      New York- Presplit rock cut along I-87 in Warren County, This method provides for line of drill holes along the proposed rock backslope which are lightly charged and set off with the regular drill holes using millisecond delays.  This provides a relatively smooth face, eliminating much scaling and simplifying future maintenance.
      
New York- Presplit rock cut along I-87 in Warren County, This method provides for line of drill holes along the proposed rock backslope which are lightly charged and set off with the regular drill holes using millisecond delays.  This provides a relatively smooth face, eliminating much scaling and simplifying future maintenance.

      

  

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Updated: 04/14/2020


        




	

    	

        
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            Federal Highway Administration | 1200 New Jersey Avenue, SE | Washington, DC 20590 | 202-366-4000