The American Society of Civil Engineers has given America’s infrastructure an overall grade point average of D+ across sixteen categories — up slightly from the D in its last report in 2009 and the first improvement since the group started its report card in 1998.

“Since 1998, the grades have been near failing, averaging only Ds, due to delayed maintenance and under-investment across most categories,” the ASCE said in its 2013 report card , released Tuesday.

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