Ainsworth-Benning is a premier Commercial General Contractor headquartered in Spearfish, SD. We have served the states of South Dakota, Wyoming, North Dakota, Montana and Nebraska for over 55 years. The company employs a crew of 75-150 workers depending on the season. We are involved in construction of commercial and industrial buildings, as well as the heavy highway and land development industries throughout this region. We participate in projects from $1,000 to over $30,000,000. We differentiate ourselves by providing an excellent product and a process that is cooperative and professional, focusing equal attention on the relationship during the project and on the end-result. We base all decisions on honesty, fairness and what is best for the project.