605 Underdrainage 300
605.10 Pipe-Aggregate Pavement Edge Drain 300
605.20 Geocomposite Pavement Edge Drain 302
605.30 Pipe-Aggregate Pavement Cross Drain 302
605.40 Structural Underdrain 303
605.50 French Underdrain 303
605.60 Outlet Pipes and Splash Pads 304
605.70 Aggregate Drains 305
Source: Missouri Standard Specifications for Highway Construction, 2023 Edition. Pages 795–795 of 797.