Buy a T-shirt here: http://practical.engineering/shop/ Support these videos on Patreon: http://patreon.com/PracticalEngineering LEARN MORE AT THE LINKS BELOW: Tetrapods - https://en.wikipedia.org/wiki/Tetrapod_(structure) Intracoastal Waterway - https://en.wikipedia.org/wiki/Intracoastal_Waterway Jetty - https://en.wikipedia.org/wiki/Jetty Corner Reflector - https://en.wikipedia.org/wiki/Corner_reflector Daylighting Streams - https://en.wikipedia.org/wiki/Daylighting_(streams) Weir - https://en.wikipedia.org/wiki/Weir Watch this video and the entire Practical Engineering catalog ad-free on Nebula: https://go.nebula.tv/practical-engineering Website: http://practical.engineering/ Music: Elexive - Valley Santa (https://www.youtube.com/watch?v=TA7Hro7OYpc)