
It is everywhere. Indiana DNR street tree data put silver maple at roughly 18% of the state's street tree population — a level extension foresters flag as dangerous over-representation given that maples overall run about a third of the inventory — and central Indiana's older ring suburbs are dominated by them.
Silver maple is the most over-planted large tree in Indiana's street tree population — roughly 18% statewide and about 14% of Indianapolis street trees — because it was the default fast shade tree in subdivisions built from the 1950s through the 1970s. Those trees are now 50-70 years old and hitting the age where the codominant unions they grew fail, which is why silver maple lands on more central Indiana storm quotes than any other species.