http://www.naturalearthdata.com/downloads/10m-physical-vectors/

http://www.naturalearthdata.com/http//www.naturalearthdata.com/download/10m/physical/ne_10m_rivers_north_america.zip
http://www.naturalearthdata.com/http//www.naturalearthdata.com/download/10m/physical/ne_10m_rivers_lake_centerlines.zip

Filter out data outside CONUS range
