Operating for more than 40 years, Luther Stem Pools and Spas is a concrete swimming pool design and construction company serving the states of Arkansas and Oklahoma. Based in Fort Smith, Ark., the firm specializes in construction and remodeling of commercial and residential in-ground concrete pools and above-ground vinyl pools with variety of designs. Some of designs offered by the firm comprise rock water falls, free form layouts and custom water features. The company offers a wide range of pool varieties, including free form pools, straight line pools, sun shelf pool, negative edge pool and raised beam pools. Besides, it also designs pool and spa combinations for its clients.