Final answer:
The Talmadge Bridge was rebuilt in 1987 to allow larger boats to navigate through the Port of Savannah, enhancing trade and transport.
Step-by-step explanation:
The Talmadge Bridge over the Savannah River was rebuilt in 1987 primarily to allow bigger boats to travel through the Port of Savannah. This construction was a part of efforts similar to those around the country to improve transportation routes which support progress and economic development.
For instance, historical efforts to improve transportation included significant works like the public works construction of the Bonneville Dam and the reconstruction bridges such as the Golden Gate Bridge. Improving navigation for larger vessels contributes to an area's economic growth by enhancing its capacity for trade and transport.