The Northeast Operating Rules Advisory Committee (NORAC) is a body of railroads that establish a set of operating rules for railroads in North America. The NORAC rulebook is used by full and associate member railroads, located mostly in the Northeast United States

Comite River; Dorcheat Bayou; Dugdemona River; Flat River; Houston River; Irish Bayou; Little River - tributary of the Black (Ouachita) River; Loggy Bayou; Mermentau River; Mississippi River; Natalbany River; New River; Old River (Louisiana), in Pointe Coupee and West Feliciana parishes; Old River (Sabine River tributary)