Projects

Is Chicagoland’s premier utility contractor and a Minority Business Enterprise that holds certifications with the City of Chicago and the State of Illinois. Since our incorporation in April 2005, Sonoma Underground has grown to cover all aspects of utility construction. From river crossings and trenching within the crowded streets of Chicago to open field trenching and boring, Sonoma Underground has the skills to get your job done right

 
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Telecommunications

Terror Lake 138kV Transmission Line, AK
Is Chicagoland’s premier utility contractor and a Minority Business Enterprise that holds certifications with the City of Chicago and the State of Illinois. Since our incorporation in April 2005, Sonoma Underground has grown to cover all aspects of utility construction. From river crossings and trenching within the crowded streets of Chicago to open field trenching and boring, Sonoma Underground has the skills to get your job done right
 
 
 
 
 
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Electrical Infrastructure

Terror Lake 138kV Transmission Line, AK
Is Chicagoland’s premier utility contractor and a Minority Business Enterprise that holds certifications with the City of Chicago and the State of Illinois. Since our incorporation in April 2005, Sonoma Underground has grown to cover all aspects of utility construction. From river crossings and trenching within the crowded streets of Chicago to open field trenching and boring, Sonoma Underground has the skills to get your job done right
 
 
 
 
 
home2
 

Electrical Infrastructure

Terror Lake 138kV Transmission Line, AK
Is Chicagoland’s premier utility contractor and a Minority Business Enterprise that holds certifications with the City of Chicago and the State of Illinois. Since our incorporation in April 2005, Sonoma Underground has grown to cover all aspects of utility construction. From river crossings and trenching within the crowded streets of Chicago to open field trenching and boring, Sonoma Underground has the skills to get your job done right
 
 
 
 
 
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Rock Drill

UPRR High speed Rail, completed a 1200’ Rock Bore under the Kankakee River.  SUSI completed this bore for 1/3 of the cost and faster than a rival contractor who completed same bore for a different Utility at same location