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Bridge Inspector’s Reference Manual. Federal Highway Administration, 2012.

Bridge Inspection Manual. Ohio Department of Transportation 2014.

Culvert Inspection Manual. Report No. FHWA-IP-86-2, Federal Highway Administration 1986.

Evaluation Procedures for Corrugated Metal Structures (In-Situ), Report No. FHWA/OH-89/005, Bowser-Morner, Inc. 1989.

Handbook of Steel Drainage & Highway Construction Products. American Iron and Steel Institute 1994.