Pennsylvania Code
Title 25 - ENVIRONMENTAL PROTECTION
Part I - Department of Environmental Protection
Subpart C - Protection of Natural Resources
Article II - Water Resources
Chapter 105 - DAM SAFETY AND WATERWAY MANAGEMENT
Subchapter C - CULVERTS AND BRIDGES
DESIGN CRITERIA FOR CONSTRUCTION OR MODIFICATION
Section 105.164 - Bridge abutments

(a) Bridge abutments shall be set well into the banks in such manner as to assure minimal increase in flood elevations.

(b) Bridge abutments shall be aligned with the flow of the stream. The Department may require, in its discretion, the construction of wing walls at the upstream side of the bridge to assist in directing flood flows through the bridge opening.