The Startup Lifting Cities out of Flood Zones | Laurence Allen of Terraform episode artwork

EPISODE · Jun 17, 2026 · 1H 3M

The Startup Lifting Cities out of Flood Zones | Laurence Allen of Terraform

from Rational Optimist Podcast

Laurence Allen, founder and CEO of Terranova, explains why flooding and land subsidence are unsolvable with seawalls alone — and how his company is using underground robotics and woodchip injection to physically lift sinking land back up.  We explore the scale of the global subsidence crisis, why cities from Jakarta to Miami to San Francisco are running out of options, and what it would take to deploy this technology at city scale. If you're interested in climate resilience, infrastructure, real estate, defense technology, or the future of human engineering, this episode maps out a solution most people assumed was impossible. In this episode: Why seawalls fail against permanent sea level rise — and the coastal cities most at risk How Terranova's robots inject woodchip slurry 60 feet underground to lift an acre of land by a foot in a single day Why woodchips are cheaper than dirt and available at massive scale in flood-prone regions How AI and machine learning are being used to map underground soil conditions and predict injection outcomes The permitting landscape, groundwater safety, and why regulators have been surprisingly supportive Terranova's current deployments, customer pipeline, and path to lifting entire cities Defense applications: levee reinforcement, military base preservation, and the Army Corps of Engineers Why this technology could unlock billions in stranded coastal real estate and solve California's water infrastructure crisis  

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The Startup Lifting Cities out of Flood Zones | Laurence Allen of Terraform

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