16-18m is what Ive heard from several sources, including some aldermen and people in the planning dept of the city, so I'm going to assume that's in the ballpark. I think the extra costs comes from the fact that the city didnt want any supports in the river and wouldnt allow any masts or any tall supports because of the helipad, which I would assume brings on a fairly big engineering problem. Remember also than an overpass is pretty short, this bridge is I think around 130m long. Im not engineer, but it doesn't sound that unrealistic to me....especially when a road interchange is always near 100 million.
|