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The Cheapest Way to Beat the Ocean Is to Stop Fighting It
Terranova is pitching a counterintuitive answer to coastal flooding: instead of walling the water out, raise the ground up. Its $92 million quote to lift an entire low-lying district four feet above the floodplain undercuts the $500-900 million price tag of a conventional concrete seawall by roughly an order of magnitude. This story breaks down the math behind that claim, tests it against the only city that ever actually did it at scale — Galveston, Texas, which jacked up 2,146 buildings after the 1900 hurricane for the inflation-adjusted equivalent of about $94 million — and weighs the hidden costs, disruption, and engineering risk that a sticker price alone never shows.
Terranova
Terranova is a Berkeley-born climate-tech and robotics startup building car-sized autonomous robots that inject a wood-waste slurry deep underground to lift flood-prone land out of harm's way - no seawalls, no surface disruption. A single 'mothership' coordinating three injection rovers can raise about one acre by one foot per day, while the buried biomass becomes a durable carbon sink that can be sold as carbon credits. Founded by UC Berkeley mechanical engineer Laurence Allen to save his hometown of San Rafael, California, the company raised a $7M seed round in November 2025 and plans its first San Rafael pilots in 2026.
Laurence Allen
Laurence Allen, co-founder and CEO of Terranova, explains how his startup lifts land out of flood zones by injecting slurries of waste wood chips deep underground, an inexpensive, scalable alternative to seawalls, levees, and demolition. Drawing on a 1970s Venice mudjacking experiment and powered by autonomous robots and AI geology modeling, Terranova aims to be 'the anti-subsidence,' protecting whole communities and critical infrastructure. Allen also reflects on his formative internship at SpaceX, his maker upbringing, the intensity of deep-tech founding, and his vision for licensing the technology to contractors worldwide.