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In our visits to Ohio's parks and preserves we've seen many wooden, covered bridges. Since wood was a cheap and plentiful in the 19th century, it was used in the construction of bridges across the many creeks and streams of Ohio. Unfortunately, a wooden bridge exposed to the elements - sun, rain, snow, ice has a a short lifespan - perhaps as short as 10 years. By adding wood siding and a pitched roof, the bridges lifespan can be greatly extended - perhaps as long as 80 or 100 years. This was the
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