text: yes contact the army corps of engineers, they will give you all the information you will need and dates of tours. i have been on several tours at the nimrod lake dam, its about 16 miles north of perryville on hwy 60, and is also used for a fallout shelter for area residents incase of a meltdown at nuclear one in dardenelle. it was built in 1946 on the fourche lefave river for flood control on the arkansas river. pretty cool tour.....oh yes....its free!!!!