For your excavation and septic installation needs, count on Spiers Construction. We work directly with Alternative Waste Water systems excavating and installing solutions across the Southwest Idaho.- Septic Tanks- Septic SystemsOur septic system is a small-scale sewage treatment with no connection to main sewage pipes provided by local governments or private corporations. Other components include pumps, alarms, sand filters, and clarified liquid effluent disposal means such as a septic drain field, ponds, natural stone fiber filter plants or peat moss beds.Call us for all your excavation needs.