SWCA Environmental Consultants Share: Energy & Environment SWCA Environmental Consultants Visit Website 201 Slate Dr #8 Bismarck, ND 58503 (701) 258-6622 (701) 258-5957 (fax) LinkedIn Facebook About Rep Info Map About SWCA is a full service environmental consulting firm that offers archaeology, wildlife, biology, NEPA, hydrology/404 permitting, paleontology, and tribal facilitation. Whom to Contact Accounts Payable What's Nearby? Distance: 5 10 15 20 25 50 mi.