Diamond Contractors, LLC Diamond Contractors, LLC Search | Advanced Search | New Members | Coupons and Discounts | All Categories Other >> Division 31 - Earthwork >> 31 23 00 Excavation and Fill Diamond Contractors, LLC 4741 Cherry LnNampa, ID 83687 | map | directions Jeff Arant (208) 898-4330 | fax: (208) 898-4331 Visit Site Specializing in grading and excavating. Member Since: 2015