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Pilot cliff stabilizers showing early gains; reef balls and dune projects advance in schematic phase
Summary
The town reported early success from March cliff‑stabilizer pilot installations at Madaket and Dionys Beach (about 1 foot elevation gain in one plot, and dune‑grass plots accreting ~5 in. vs a 2 in. control). Town staff also described Francis Street dune/boardwalk designs and Sacagawea Pond reef‑ball modeling, which showed a ~90% reduction in wave energy in modeled scenarios.
Leah, the town’s coastal resilience coordinator, told the Nov. 17 NPDC meeting that two pilot 'cliff stabilizer' systems installed in March are producing encouraging short‑term results. At the Madaket installation, Leah said the stabilized area increased in elevation by about a foot a few weeks after installation; a dune‑grass treatment plot accreted roughly five inches while an untreated control accumulated about two inches.
"They're temporary devices," Leah said of the honeycomb‑style stabilizers; the devices are screwed into the coastal bank, planted with dune grass and left until vegetation…
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