131 - TREE GRATES 201 - SEWER MANHOLE BASE 208 - SEWER CLEAN-OUT 301 - INLET TYPE I - OS 302 - INLET TYPE II - OL 303 - INLET TYPE III - GOL 304 - INLET TYPE IV - GVOV 305 - MISC CURB INLET DETAILS AND NOTES 306 - MISCELLANEOUS INLET - DETAILS AND NOTES 309 - PARKWAY CULVERT TYPE 'A' 310 - PARKWAY CULVERT TYPE 'B' 311 - PARKWAY CULVERT TYPE 'C' 312 - PARKWAY CULVERT DETAILS AND NOTES 313 - JUNCTION STRUCTURE TYPE I - OUTLET DIAMETER 39 INCHES OR LESS 314 - JUNCTION STRUCTURE TYPE II - OUTLET DIA 42 INCH OR GREATER 315 - JUNCTION STRUCTURE TYPE III 318 - CONSTRUCTION DETAILS CAST-IN-PLACE CONCRETE PIPE 319 - JUNCTION STRUCTURE CAST-IN-PLACE CONCRETE PIPE 331 - DOWNDRAIN TO PIPE TRANSITION 337 - DESILTING BASIN 407 - STANDARD MANHOLE FRAMES AND COVERS 408 - PRECAST REINFORCED CONCRETE MANHOLE