Black Rock Underground, LLC

Black Rock Underground, LLC is an Excavating contractor, Septic system service, and Utility contractor serving the Portland area with site prep, trenching, utility installation, and septic solutions for homes and businesses. Schedule a site walk to secure a clear, itemized scope that covers permitting, 811 utility locates, soil/rock contingencies, haul-off and backfill, compaction, and surface restoration. For septic needs, ask about inspection reports, tank pumping intervals, drain field evaluations, and emergency repair response times to prevent costly failures. If you’re coordinating utilities, request trenchless options where feasible, confirm traffic control and right-of-way requirements, and set a phased timeline so other trades stay on schedule.