The rugged geography, dense population, and arid nature of Southern California has ... great examples of mountain tunnel architecture. The Boring Company’s Hawthorne R&D Test Tunnel was never ...

The rugged geography, dense population, and arid nature of Southern California has ... and the upper tunnel completed in 1954, is approximately 250 feet. These tunnels are still in use, and the ...

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Credit: Bria Woods / San Antonio Report It’s been three years since a Bexar County agency gave the nod for an underground tunnel between the airport and downtown San Antonio. It now appears those ...

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