Big Bertha: How a Massive Tunnel Boring Machine Dug a Highway under Seattle by Amanda Abler

Big Bertha: How a Massive Tunnel Boring Machine Dug a Highway under Seattle

Amanda Abler

48 pages

1 edition

nonfiction
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This incredible story about Bertha, the massive tunnel boring machine that successfully constructed the longest and widest road tunnel in the contiguous United States, under the city of Seattle, brought to life in vibrant and engaging illustration...

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