Professional, friendly, and responsive, Robert Peccia and Associates (RPA) is a full service Montana civil engineering and surveying firm serving federal and state agencies, municipalities, and private clients and organizations. RPA works throughout the United States as well as internationally. - Water Systems - Wastewater Systems - Site Development - Storm Drainage - Structural Engineering - Natural Resources - Highways and Urban Streets - Traffic and Transportation - Airports - Environmental Documents - GIS/Graphic Design - Land Surveying /Subsurface Utility Engineering (SUE)