The city of Gadsden, Alabama (where Noah’s parents live)
is considering replacing one of the bridges that cross the Coosa
River that runs through town. The primary benefits of replacing the
current bridge are reductions in commute time, traffic, and better
foot traffic safety for people walking across the bridge. The
expected cost of the bridge is $8 million. The expected benefits
from primary sources over the coming years are $4 million
immediately, and $1 million each year over the...