401 - Inlet Type I 402 - Inlet Type II 404 - Miscellaneous Curb Inlet Details and Notes 407 - Parkway Culvert (Types A, B AND C) 408 - Junction Structure Type I 409 - Junction Structure Type II 410 - Junction Structure Type III 421 - RC Box Manhole 422 - Manhole Steps 423 - Manhole Frame and Cover 436 - Down Drain to Pipe Transition 454 - CSP Drop Inlet