Tri-State Obstetrics & Gynecology, Inc. - Bridgewater. 195 Boundary Lane. Beaver, PA 15009. 724-843-0737. Christopher J. Palombo, MD. Patricia Vigder, DO. Paula S. Youngdahl, MD. We offer same-day office visits for urgent problems at our 3 convenient Beaver County office locations (Chippewa, Bridgewater, and Heritage Valley Beaver). We do ....