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Document Designation and Title Year Select Item(s) C4 Standard Specification for Clay Drain Tile and Perforated Clay Drain Tile 04e1 C4 Standard Specification for Clay Drain Tile and Perforated Clay Drain Tile 04 C4 Standard Specification for Clay Drain Tile and Perforated Clay Drain Tile 03 C4 Standard Specification for Clay Drain Tile and Perforated Clay Drain Tile 02 C4 Standard Specification for Clay Drain Tile and Perforated Clay Drain Tile 00 C4 Standard Specifications For Clay Drain Tile 62