Simco Development Group Simco Development Group Search | Advanced Search | New Members | Coupons and Discounts | All Categories Other >> Division 31 - Earthwork >> 31 23 00 Excavation and Fill Simco Development Group 4563 Magrath DrCoeur d'Alene, ID 83815 | map | directions Jason Simmons (208) 770-9391 We are an excavation company who specializes in commercial and residential civil infrastructure. Member Since: 2018