3.1 Corrugated Metal, Aluminized Culvert Pipe and Pipe Bands (Round) ▪ Contractor shall comply with all standard specifications as detailed in AASHTO M-274 as may be amended. See TDOT standard drawing D-PB-2 (Attachment C). 3.2 Corrugated Metal Aluminized Culvert Pipe and Pipe Bands (Arch) ▪ Contractor shall comply with all standard specifications as detailed in AASHTO M-274. See TDOT standard drawing D-PB-2 (Attachment C). 3.3 Concrete Drainage Pipe ▪ This pipe shall meet the requirements of subsection 914.02 of the 2021 TDOT Standard Specifications for Road and Bridge construction. See TDOT standard drawing D-PB-1 (Attachment D). o The 2021 TDOT Standard Specifications for Road and Bridge Construction can be found at the following URL: o https://www.tn.gov/content/dam/tn/tdot/construction/2021-standardspecifications/January_1_2021_Standard_Specifications.pdf 3.4 Concrete, Box Culverts and Catch Basins ▪ These materials shall meet the requirements of subsection 914.08 of the 2021 TDOT Standard Specifications for Road and Bridge Construction.