Battery Dantzler was constructed at the northern end of the Howlett Line in May 1864 to stop Union naval forces from advancing up the James River to Richmond. Confederate forces engaged in several artillery duels with Union ironclads. Union troops tried to evade the battery by digging Dutch Gap Canal, which today serves as the main river route to Richmond. View the Confederate earthworks and see the interpretive signs, photographs and observation deck overlooking the James River. A Chesterfield County Parks site.