CDOT/SR-119

Blackhawk, CO.

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M.C. Donegan: Provided controlled drilling, blasting, presplitting and rock bolting for the widening of State Road 119 through the city of Blackhawk, CO.  Pre and post blast surveys of structures nearby and seismic monitoring of all structures of concern.

 

The city of Blackhawk only allowed the work to be performed from midnight to 8 a.m. so that it would not affect the city’s business during the day and evening.  Crews loaded blast holes, and had the shots ready for initiation at sunrise every day for one year.

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Crews are drilling presplit holes (background) and drilling for rock anchor systems.


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Drilling production holes, (foreground).


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