(Portland, OR) -- A civil engineering and business expert who represents opponents of the Interstate Bridge Project says tolls could reach 20 dollars a crossing, because of rising costs. Bob Ortblad, a retired civil engineer, says the project that's currently estimated to cost six-and-a-half-billion-dollars could reach nine-point-four-billion-dollars. He doesn't think the project will qualify for a one-billion-dollar Federal Transit Administration grant, because of low light rail ridership expectations. The group Neighbors for a Better Crossing want a tunnel instead of a bridge.