State Bridge No. 424, Wiggins Mill Road (Road 446) spanning Wiggins Mill Pond Outlet, Townsend, New Castle County, DE

Significance: Bridge No. 424 is a rare surviving representative of the Warren pony-truss bridge type, a form of metal truss that was commonly employed for small-scale rural crossings in Delaware during the late nineteenth century. It is one of just six metal truss bridges still in service in the state. The bridge was built in 1884 by the Edge Moor Bridge Works of Wilmington, Delaware, a nationally prominent manufacturer of iron bridges during the period 1873-circa 1900.
Survey number: HAER DE-48
Building/structure dates: 1884 Initial Construction