He roofed and sided the bridge at the suggestion of an individual whose estate bordered the river. These bridges were soon common throughout the Americas. They lasted until the 19th century when iron and steel gradually replaced timber as the building material for bridges. Slightly more than 1,000 remain. Pennsylvania has close to 300 with Vermont, Ohio, Indiana, Oregon, Georgia, New York, and New Hampshire among the 20 to 25 other states with covered wooden bridges remaining.
Activities Let's Uncover the facts.
Using maps, find the covered bridge capital of the world. Locate sites that will provide information explaining why covered bridges were needed and how they effected the economy. List several items used in the construction of covered bridges that are in short supply today. Using net links in the bibliography, locate a list of Vermont's covered bridges. Draw a picture of a covered bridge demonstrating perspective .