background
brown
canal
communication
conduit
construction
country
deep
development
dig
digging
dirt
ditch
drain
drainage
drip
dug
earth
earthen
earthmoving
earthwork
eco
ecology
equipment
excavating
fiber
foundation
ground
hole
house
housing
industry
irrigation
laying
line
long
mining
moat
optic
outdoor
pipe
pipeline
pipework
pit
repair
sewer
sewerage
soil
system
trench