Updated 2008. This is a full-color, waterproof and tear resistant map with GPS Grid. This map combines both Lock and Dam #4 and #5. Red River Lock and Dam #4 is located on the Red River between Shreveport, LA and Natchtoches, TX. Navigation markers 168 to 197. Dam #5 is Navigation Mile Marker 197 to Shreveport. It's excellent for Big Mouth Bass. Our map has up-to-date navigation markers, road systems, access points and public areas. They locate the area's goods and services with full-color photographs and information on popular Resorts, Marinas, Motels, Bait and Tackle Stores, restaurants and other businesses in the area as shown on the facilities links.