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Photo 1-4. Tunnel A Utility Vault (UV) - 2 (A-1433)
Shows drip from vertical riser at UV-2 depositing calcium shown in previous picture (P1-3). |
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Photo 1-4. Tunnel A Utility Vault (UV) - 2 (A-1433)
Shows drip from vertical riser at UV-2 depositing calcium shown in previous picture (P1-3). |
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