Go here and see compatability for your 587...NAVIONICS: The Leader in Electronic Charts

Unless I'm reading it wrong..it looks like the Navionics "Hotmaps" or the "Premium" chip would work in your unit..

Then here to see the your area lake...in the "Premium" chip..NAVIONICS: The Leader in Electronic Charts

Then here to see your area lake ...in the "Hotmaps"....NAVIONICS: The Leader in Electronic Charts

It also looks like KY and Barkley are "High Definition" maps in these lists...

Your gonna need the "E" (East) region chip in either the "Hotmaps" or the "Premium"..

I use that same "Premium East" chip in my 1197 and I love it...depth contours to 1 ft increments....

I fish KY and Barkley lakes exclusively.....