Bridge: arched

Illustration of sideways view of Sydney Harbour Bridge, a through arch bridge

Illustration of a suspension bridge

Illustration of a raingarden, a planted depression that allows rainwater runoff from impervious urban areas the opportunity to be absorbed

Illustration of riprap used for erosion control

Illustration of a crane, symbolizing construction

Illustration of an upright water pipe

Illustration of a hydroelectric turbine

Illustration of a house with an underground septic system draining to groundwater