DECATUR- Drive on the Rt. 51 bridge over Lake Decatur, and you can see why the state is moving forward with replacing the bridge decks. They're taking bids in mid-September, with work that could begin late this year. During construction, there will be one lane of traffic each way over the dam. But while the state is doing the bridge work, the city would like to take all the drainage off the bridge areas and put it into a closed drainage system that discharges into the river below the dam.City manager Ryan McCrady says doing this would be the cheapest and most efficient solution.