​  237110 – Reservoir construction

​  237210 – Land subdividing and utility installation (electric, water and sewer)

​  237310 – Grading, highway, road, street and airport runway

​  237990 – Retaining walls, anchored, construction

​  484220 – Dump trucking (gravel, sand, top soil)

​  562119 – Dump trucking of rubble or brush with collection or disposal