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Old Westbound Viaduct Quickly Becoming Memory

Taking down the original westbound Nalley Valley Viaduct

The original westbound viaduct's tetrapods, those unique support piers that are splayed at a 30-degree angle, are starting to come down.  Each pair of four-legged tetrapods support both the old eastbound and westbound viaducts, so demolishing them takes some preplanning.  Crews will leave six of the eight legs intact on most of the tetrapod pairs until the old eastbound viaduct is no longer needed in about a year.  Temporary supports (the brown pipe-like structures seen in the foreground on right and next to the equipment on left) are also part of the demolition process.