MC Underground & Septic Service

03/13/2026

12/11/2025

Bio-Microbic septic systems are engineered to achieve exceptional performance while prioritizing environmental responsibility. With a proven track record of successful installations, MC Underground is the trusted expert for complex septic system installations.

12/11/2025

Pink skies and steady progress in Twin Falls today as MC Underground installed a 15-ft lift station. Precision, safety, and quality—every project, every time.

10/23/2025

SUB CONTRACTORS NEEDED.

We are in search of subs needed for the remodel of an existing commercial building located in Eagle, id. Job scope will be for a Golf Simulator Facility Scope of work will include electrical, plumbing, framing and Mechanical Modifications according to plans. All subs will be required to be fully licensed, insured and carry workers compensation.

Please submit your information in the comments or pm would prefer a company that can handle full scope.

10/10/2025

07/18/2025

Some of our current projects on the chobani plant.

06/18/2025

MC Underground is looking to hire an operator and Laborer. We are a small underground construction company and specialize in residential and commercial dirt work. Call for more details. Multiple locations available!
208-315-7743

Thank you for visiting MC Underground's page. We strive to create happy lifetime customers.

06/05/2025

Expansion of the chobani plant in twin falls still alot of work to be done.

01/29/2025

Biomicrobics etps septic system with an intrench sand filter drainfeild 1 of 26 we are doing in the burris ranch subdivision middleton idaho

12/06/2024

It's that time of year