From El Dorado, AR take hwy 63 north. Go 6.4 miles and turn left on Armer Road at the intersections of hwy 63 & 129.
Go1 mile and turn right on Crain City Road. Travel 4.9 miles and turn right on New Lock 8 Road.
Go 1.4 miles and turn right near the Lock office then travel .9 miles to the recreation area.

H. K. Thatcher Lock & Dam, also known as Calion Lock And Dam is a gravity dam on the Ouachita River in Union County, Arkansas
│ H.K.Thatcher Lock and Dam │ Felsenthal Lock and DamIn 1984 H.K. Thatcher Lock and Dam replaced the original lock built in 1916.
Columbia
Lock & Dam │
Jonesville Lock & Dam
│
Ouachita and Black Rivers Navigation Project
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