Originally founded as Eastco Construction by Dick Stimpel in 1969, Stimpel-Wiebelhaus Associates (SWA) is the product of a business continuation plan prepared under the guidance and cooperation of Dick Stimpel, Bill Wiebelhaus, and key management employees. The implemen-tation of this plan enables SWA to continue its growth into the 21st Century. SWA is committed to continuing its proud tradition of completing quality projects while providing livelihood, professional advancement and personal growth for its employees and their families.


SWA experience includes a wide variety of projects. From dam construction to mass excavation, including roller- compacted concrete and structural concrete. We do sitework, blasting, riprap, tidal and tunneling projects, and of course bridge construction, just to name a few.


SWA is dedicated to quality and safety. These ideals are made possible by the experience, innovative ideas and hard work of our employees. SWA continuesto adapt and grow with the ever-changing demands of the heavy civil & highway construction as well as the mining industries.

We provide full service con-struction capabilities, com-pleting projects on time and within budget as a team with the Owner and Engineer. We maximize communication and understanding with all parties on our projects to share, recognize, and achieve team goals.


Our management and in- house technical support can provide full service in QC/QA, CPM scheduling, Professional Engineering services such as design of temporary facilities, false-work, shoring, quantity measurements & calcu-lations, seismic monitoring during blasting operations, estimating, and many other specialty services.