asphalt

base

block

build

building

cavity

concrete

construction

contractor

cork

dig

digging

dirt

dirty

engineering

excavate

excavated

excavation

ground

group

heap

heating

heavy

industrial

industry

lied

main

massive

middle

passersby

person

piece

pipe

progress

red

road

safety

scoop

sidewalk

stripped

system

tape

tightened

trench

under

vehicle

walk

warning

white

work