The RCP Overland Flow Model analyzes spill directions, volumes, and distances in the event of a pipeline rupture. The Flow Model automatically calculates the volume of a spill at any point on the pipeline, using a given response time and flow rate. From the spill point, the Flow Model combines elevation, soil type, drainage patterns, and stream flow data together to determine the path of the spill. If the spill intersects any unusually sensitive areas or navigable waterways, a report is generated listing the applicable intersections. If the spill intersects a waterway or drainage, the Flow Model will track the spill downstream and predict its flow path based on a given response time, spill volume, and hydrographic data. The water borne transport analysis utilizes the methodology found in 40 CFR 112 Attachment C-III. This analysis will consider transport on flowing waterways, transport on lakes or ponds, and transport on tidal influenced areas as appropriate. By using the HCA Trace function in the Spill Model, each affected area can be traced back to a specific spill point on the pipeline. The spill points will be aggregated to determine pipeline covered segments.