S & L Underground Inc. is a HUBZONE certified heavy civil contractor based in Bonners Ferry, ID, specializing in underground utilities, water and sewer systems, bridges, and roadways. With over 19 years of experience and more than 100 completed projects, they have established a reputation for delivering exceptional quality and customer service, consistently completing contracts on time and within budget.
From constructing reservoirs and water storage facilities to installing sewer pipelines and bridges, S & L Underground Inc. has a proven track record of successfully executing a wide range of projects across multiple states, including Idaho, Montana, Washington, and more. Their expertise, licensed and bonded in various states, ensures that they can handle complex construction challenges while maintaining the highest standards of professionalism and efficiency.
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