![[Walnut Lane Bridge Over Wissahickon Creek, Philadelphia]](/images/walnut_lane_bridge_over_wissahickon_creek_asce_426_small.jpg "Walnut Lane Bridge Over Wissahickon Creek, Philadelphia")
Description: Illustration of Walnut Lane Bridge over Wissahickon Creek, Philadelphia.
Source: George S. Webster and Henry H. Quimby, "Walnut Lane Bridge, Philadelphia" (Transactions of the American Society of Civil Engineers, December 1909, vol. LXV, plate XIV, opposite page 426).