Beaver Valley (formerly known as Chandler’s Hollow) straddles the Pennsylvania and Delaware border in Delaware County, PA and New Castle County, DE. An unincorporated place name, it is traversed by several streams which drain to Beaver Run which itself empties into the Brandywine River. It is approximately bounded by US Route 202 to the east, The Brandywine River to the west, Thompsons Bridge Road to the south, and Smithbridge Road to the north, with Beaver Valley Road encircling a large portion of the valley. The majority of the lands in Beaver Valley have been owned for decades by The Woodlawn Trustees, which designated in the early 1970s all of its Brandywine Hundred and Delaware County holdings in Beaver Valley and elsewhere as a Wildlife Refuge.