Excavation, Underground Utilities, Septic Systems, Site Prep... Hartman Construction Co. is based in Clatsop County, Oregon. With over 26 years of excavation experience, we've enjoyed the privilege of serving many new AND return customers. Quality, trust and attention to detail are fundamental - the basis of our services to clients. Small business like ours depends on satisfied customers and an excellent reputation. That's one reason why we work just a little bit harder for our clients. Call us...we provide free estimates, and we can answer your questions honestly and with professional know-how.