allegheny
arch
architecture
baseball
beam
bridge
built
cars
city
city of bridges
connection
constructed
cross
design
diamond
engineering
field
game
infield
innings
landmark
northeast
ohio
outfield
park
pathway
pedestrian
pennsylvania
pirates
pittsburgh
pnc
pnc park
river
river bridge
roadway
seats
stadium
steel
structure
suspension
team
three sisters
traffic
transportation
truss
vehicles