We invite you to experience our services. Contracting since 1987, lnterwest Construction, Inc., is a well-respected privately ... owned heavy civil construction company contracting throughout Washington state. Our success has resulted from continued focus on customer satisfaction in every aspect. Our field teams work closely with Safety, Surveying, and Environmental specialist to bring projects in on-time and within budget, while exceeding specifications and regulations. Our multi-faceted operations include, but are not limited to; heavy highway construction; airport construction, grading, excavation, drainage, total site development, fish passage, underground utilities, bridges, roads, parking areas, sidewalks and curbs, surveying, building pads, aggregate sales, recycled aggregates, erosion control, demolition, mass excavation, storm conveyance and structural excavation. Contact us to schedule an in-person or telephone consultation by telephone (360)757-7574 or by email at general inquiries: info@interwest.biz or bids: bids@interwest.biz read more