Yeh and Associates, Inc. specializes in geotechnical engineering, engineering geology, and construction management and materials testing. Our extensive professional engineering experience includes traditional investigation services, geologic hazard evaluation, and geotechnical evaluation supporting the planning, permitting, design and construction of infrastructure projects. Some of the design services include soil nail walls, mechanically stabilized earth walls, micropiles, anchor systems, soil improvements and various pavement structures. Yeh employs 150 professionals with considerable experience in the fields of geological and geotechnical engineering, geology, materials testing, construction management, and environmental fields. The firm is capable of handling projects of all sizes and complexity. Yeh has six offices in Colorado and two in California. Founded in 1979, JFSA has established a solid track record of high-quality client service. We are experts in providing the following: * Transportation Engineering * Civil / Site Development * Structural Engineering * Water Resources * Survey / Right-of-Way