SALT LAKE CITY — Failure to address needed repairs in infrastructure like high hazard dams, bridges, wastewater treatment systems and even levees designed to hold back floodwaters costs the average U.S. family $3,400 in disposable income each year, according to findings by the American Society of Civil Engineers. And in extreme cases it costs lives. In a report card grading Utah's infrastructure released Wednesday, the state received a cumulative grade of C+, which is the same overall grade it received five years ago when the last assessment was released. While receiving the same marks might indicate a lack of progress by Utah, the society says that assumption shouldn't be made.