Observed arrival · 2026-09-05
Grown Wall: A Calculator for Limestone Seawalls
An engineering calculator explores whether seawater, electricity, steel strips, and growing limestone could form a porous coastal wall.
Field notes
The calculator treats a seawall as a coupled materials-and-operations problem: steel geometry, anchor spacing, limestone growth, electricity, and maintenance all affect the result. Its example compares a proposed one-mile wall with a $7.5 million installed rock mound, while noting that barge work, divers, permits, and other installation costs are excluded. The page also distinguishes measured or published benchmarks from unresolved questions about limestone tensile strength, bonding, and wave resistance.
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Editorial observations of this landing page, not a rating.
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