In this episode, Kiewit tackles the Portsmouth Uranium Refinery and the St. Lawrence Seaway, where they built locks for ocean-going vessels. Aaron also reads about the Friant Canal, which supplies water to Southern California. 

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Stay Dirty!

**UPDATE**

Dirt Talk is STOKED to announce Ariat as our first official sponsor for the year!

They make world-class footwear and workwear that we see on every job site we visit, and their folks are just as great as their products.

Dirt Talk listeners can receive 10% off their first order with Ariat by clicking here or visiting Ariat.com/dirttalk.