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founder:
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CoinsAndPins
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date created:
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09/03/2007
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no. of members:
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23
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description/mission statement:
Bridges which use an arch to support its load are for this category. This type of bridge design is one of the oldest and longest lasting kinds. Several stone arch bridges made over 1000 years ago are still standing today, even without the use of mortar. Arch bridges can span up to roughly about 1700 feet.
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open enrollment: ON
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This group manages the following:
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