Molly...the "old train trestle" can be seen all year around, just more of it visible in the winter with the low water. This year the water is even lower because of the drought this year. This picture is from October 2010. I've been in this area 26 yrs and the water is the lowest I've seen it. The funny thing is in May we had a 500 yr flood..16 inches of rain in two days, then a drought.
Haven't been to kentucky lake..... yet, But fish reservoir lakes often. Judging by the bare trees... the bridge trestle in the "now" picture could be exposed because of the winter draw down.( performed in anticipation of heavy spring rains so the reservoir doesn't overfill or for conservation management ) And yes, it would be otherwise submerged when the lake is at regular pool. I'll have to look for that submerged bridge when my husband and I go there in the fall. I'm sure there's lots of crappies there, maybe a monster bass or two :-)
There isn't even that much of the bridge showing. The whole town was flooded in 1945 (including this bridge area). There is no longer any part of the bridge showing above water.