When did xiushui county Liangtang Bridge begin to be built?

According to relevant public information, xiushui county Liangtang Bridge started construction in September 2009. A bridge whose total length (the distance between the front and rear edges of two abutments) is greater than or equal to 100m and less than 1000m, or whose calculated span (the distance between two branches of the bridge structure) is greater than or equal to 40m and less than 150m is called a bridge.