The U.S. Army Corps of Engineers Louisville District has installed automated fee machines at many of the recreation areas in the Green River Area, which includes Rough, Nolin, Barren, and Green River Lakes in Kentucky. Starting April 1, 2021, these areas will no longer accept cash as payment. The automated fee machines accept payments for day-use passes and/or annual passes by credit card only. These automated machines will not be installed in any areas where fees were not previously collected—only the method of collecting fees is changing.