Answer: viaduct

AnswerCrossword Clue
VIADUCT

Railroad bridge

VIADUCTRailroad bridge.
VIADUCT

Kind of bridge.

VIADUCT

Bridge.

VIADUCT
Railroad span
VIADUCT
Bridge over a valley
VIADUCTType of bridge
VIADUCTWord that led to the "Why a duck?" routine by the Marx brothers
VIADUCTSpan across a gorge, say
VIADUCTTar "... Removal"
VIADUCTBridge spanning a valley