Standard Catch Basins Standard 2'-2" X 3' Catch Basin 3' X 3' reduced to 2'-2" X 3' Catch Basin 4' X 4' reduced to 2'-2" X 3' Catch Basin 5' X 5' reduced to 2'-2" X 3' Catch Basin Standard 2'-8" X 5' Catch Basin Covered 5' X 5' reduced to 2'-8" X 5' Catch Basin Covered   NC DOT Catch Basins DOT 2'-2" X 3' Catch Basin DOT 3' X 3' reduced to 2'-2" X 3' Catch Basin DOT 4' X 4' reduced to 2'-2" X 3' Catch Basin DOT 5' X 5' reduced to 2'-2" X 3' Catch Basin DOT 2'-8" X 5' Catch Basin Covered DOT 5' X 5' reduced to 2'-8" X 5' Catch Basin Covered   Standard Drop Inlets Standard 2'-2" X 3' Drop Inlet Standard 3' X 3' Drop Inlet 3' X 3' reduced to 2'-2" X 3' Drop Inlet 4' X 4' reduced to 2'-2" X 3' Drop Inlet 5' X 5' reduced to 2'-2" X 3' Drop Inlet   NC DOT Drop Inlets DOT 2' X 10" Narrow Drop Inlet DOT 2'-2" X 3' Drop Inlet DOT 3' X 3' reduced to 2'-2" X 3' Drop Inlet DOT 4' X 4' reduced to 2'-2" X 3' Drop Inlet DOT 5' X 5' reduced to 2'-2" X 3' Drop Inlet   Standard Median Inlets Standard 2' X 3'-10" Median Inlet 4' X 4' reduced to 2' X 3'-10" Median Inlet 5' X 5' reduced to 2' X 3'-10" Median Inlet   NC DOT Median Inlets DOT 2' X 3'-10" Median Inlet DOT 4' X 4' reduced to 2' X 3'-10" Median Inlet DOT 5' X 5' reduced to 2' X 3'-10" Median Inlet   Standard Junction Boxes Standard 2' X 2' Junction Box Standard 2'-2" X 3' Junction Box Standard 3' X 3' Junction Box Standard 4' X 4' Junction Box Standard 5' X 5' Junction Box   NC DOT Junction Boxes DOT 2' X 2' Junction Box DOT 2'-2" X 3' Junction Box DOT 3' X 3' Junction Box DOT 4' X 4' Junction Box DOT 5' X 5' Junction Box   Knock-Out Boxes 2' X 2' Box with 2'-6" Knockout 2' X 3'-10" Box with 2'-9" Knockout 2'-8" X 5' Box with 4'-6" Knockout 3' X 3' Box with 3'-6" Knockout 4' X 4' Box with 4'-6" Knockout 2'-2" X 3' Catch Basin with 2'-9" Knockout 2'-2" X 3' Catch Basin with 4' Knockout 2'-2" X 3' Drop Inlet with 2'-9" Knockout 2'-2" X 3' Drop Inlet with 4' Knockout   DOT End Walls and Pipe Ends DOT Pipe End DOT Under Drain Pipe Splash DOT End Wall   City Specification Structures Raleigh 2'-8" X 5' Curb Inlet Greensboro 2'-5" X 4'-10" Curb Inlet Greensboro 2'-5" X 6'-4" Curb Inlet Greensboro 2' X 2' Drop Inlet Greensboro 3' X 3' Yard Inlet Charlotte/Mecklenburg 2'-4" X 3' Drop Inlet Wilmington 3' X 4' Curb Inlet