THe lake I fish is around 13 feet give or take, but the bridge is around 15 or 20 feet deep. When and how should I fish It? ;D

I would try a drop shot and maybe a jerkbait, thats what they did at the Classic anyhow.

try draging a tube jig along the bottom

try a jig

I'd fish it when the sun is high and real bright.The shade line around the bridge creates sort of a boundary for the fish.

On the upper side of the bridge pilings you should have brush,logs and lots of cover built up.When the fish are looking for a meal,they will usually go to the front end and hide in the brush.

On the backside,there may be a little brush but the attraction for the fish on lower side will be the current break.They can hang out back there in the slack water and wait on bait to float by with minimal effort.

If the water is only 15 ft under the bridge,you should have no problem catching fish.If there is a definite current present,cast upstream with a carolina rig.Casting upstream in current assures your bait of staying in contact with the bottom.

If you cant get bit on the bottom,this means the fish are possibly suspended.In this case,a crankbait or jerkbait are great choices.