| PSC | Description
|
| Y111 | Construct/office buildings |
| Y112 | Construct/conf space & fac |
| Y119 | Construct/other admin & svcs bldgs |
| Y121 | Construct/air traffic cont towers |
| Y122 | Construct/air traffic training fac |
| Y123 | Construct/radar & navigational fac |
| Y124 | Construct/airport runways |
| Y125 | Construct/airport terminals |
| Y126 | Construct/missile system facilities |
| Y127 | Construct/elct & comm system fac |
| Y129 | Construct/other airfield structures |
| Y131 | Construct/schools |
| Y139 | Construct/other educational bldgs |
| Y141 | Construct/hospitals & infirmaries |
| Y142 | Construct/laboratories & clinics |
| Y149 | Construct/other hospital bldgs |
| Y151 | Construct/ammunition facilities |
| Y152 | Construct/maint bldgs |
| Y153 | Construct/production bldgs |
| Y154 | Construct/ship constr & rep fac |
| Y155 | Construct/tank automotive fac |
| Y159 | Construct/other industrial bldgs |
| Y161 | Construct/family housing |
| Y162 | Construct/recreational bldgs |
| Y163 | Construct/troop housing |
| Y164 | Construct/dining facilities |
| Y165 | Construct/religious facilities |
| Y166 | Construct/penal facilities |
| Y169 | Construct/other residential bldgs |
| Y171 | Construct/ammunition storage bldg |
| Y172 | Construct/food/grain storage bldgs |
| Y173 | Construct/fuel storage bldgs |
| Y174 | Construct/open storage facilities |
| Y179 | Construct/other warehouse bldgs |
| Y181 | Construct/R&D - goco facilities |
| Y182 | Construct/R&D - gogo facilities |
| Y183 | Construct/R&D-goco envir labs |
| Y184 | Construct/R&D-gogo envir labs |
| Y191 | Construct/museums & exhibition bldg |
| Y192 | Construct/test & measurement bldgs |
| Y199 | Construct/misc bldgs |
| Y211 | Construct/dams |
| Y212 | Construct/canals |
| Y213 | Construct/mine fire cont |
| Y214 | Construct/mine subsidence cont |
| Y215 | Construct/surface mine reclamation |
| Y216 | Construct/dredging |
| Y219 | Construct/other conservation |
| Y221 | Construct/airport service roads |
| Y222 | Construct/highways-rds-sts-bridges |
| Y223 | Construct/tunnel & subsurf struct |
| Y224 | Construct/parking facilities |
| Y231 | Construct/epg - coal |
| Y232 | Construct/epg - gas |
| Y233 | Construct/epg - geothermal |
| Y234 | Construct/epg - hydro |
| Y235 | Construct/epg - nuclear |
| Y236 | Construct/epg - petroleum |
| Y237 | Construct/epg - solar |
| Y239 | Construct/epg - other incl transm |
| Y241 | Construct/fuel supply |
| Y242 | Construct/heating & cooling plants |
| Y243 | Construct/pollute abatement & contr |
| Y244 | Construct/sewage & waste |
| Y245 | Construct/water supply |
| Y249 | Construct/other utilities |
| Y291 | Construct/rec non-bldg structs |
| Y292 | Construct/exhibit (non-bldg) |
| Y293 | Construct/unimproved real prop |
| Y294 | Construct/waste trmt-store fac |
| Y299 | Contruct/all other non-bldg facs |
| Y300 | Construct/restoration |