A. Utilize the correct design.

Text Box: Use the procedure found in Minimum Standard 3.18 in the VESCH  - NOT the procedure  found the VDOT Road & Bridge Specifications and VDOT Informational Memorandum.           

B. Use an adequate depth of stone for the outlet protection.

Text Box: Provide a 2.5’ depth of stone for Class I Riprap and a 3.6’ depth for Class II.         (equates to 1.5 x the maximum stone diameter, or 1.5 x (1.5 x D50))   

C. Multiple culverts require a modified design procedure.