Geosynthetics June/July 2022 - 44

FINAL INSPECTION
The Triton marine mattresses' limestone filling
provides the substrate for growing oysters,
helping repopulate the oyster reef systems
surrounding Staten Island, N.Y. Photograph
courtesy of Tensar International Corp.
PROJECT HIGHLIGHTS
MARINE MATTRESSES FOR
SHORELINE PROTECTION
OWNER
State of New York
LOCATION
Tottenville Beach, Staten Island, N.Y.
GENERAL CONTRACTOR
Weeks Marine Inc.
ENGINEERS
COWI A/S
WSP Global Inc.
GEOSYNTHETIC PRODUCTS
Triton Marine Mattress System
Separation geotextile
GEOSYNTHETIC MANUFACTURERS
Tensar International Corp.
TenCate Geosynthetics Americas
44
Geosynthetics | June July 2022
'Living breakwaters' protect Staten
Island's shoreline
C
oastal erosion in the United States costs roughly $500 million in property damage
annually. Proposed solutions focused on building higher, thicker, wider protective
structures-such as seawalls-are expensive and exacerbate erosion. Engineers
developed a resilient system of " living breakwaters " with geosynthetics that effectively
and sustainably reduces storm damage while enhancing plant and marine habitat in
the waters surrounding Staten Island, N.Y. The project broke ground on Sept. 21, 2021.
Engineers create living breakwaters using the Tensar International Corp. Triton
Marine Mattress System of strong, flexible geogrids filled with limestone. The company
fabricated the mattresses to address geotechnical issues at the site, like irregular
land contours, variable subgrades, continuous scour and generally harsh conditions.
" The uniformity, strength, ease of installation, stability and porosity of the Triton
Marine Mattress System makes them a fit for this project, " says Steve Williams, industry
manager, marine and ports, at Tensar. " The strength of the mattress system makes
it ideal for use on a subgrade like the seabed around Staten Island. The mattresses
address toe scour protection, differential settlement, bearing capacity and global
stability of the structure. "
In addition to dampening wave energy, the living breakwaters serve-just like
their nature-made counterparts-as habitat for oysters, lobsters and juvenile fish.
Triton marine mattresses are key to successful oyster restoration, as their filling provides
the substrate for oyster growth. Oyster spat (larvae) incubated in repurposed,
disinfected oyster shells from New York restaurants, are transported to and placed
on the structure. There, they attach and grow to maturity. G

Geosynthetics June/July 2022

Table of Contents for the Digital Edition of Geosynthetics June/July 2022

Geosynthetics June/July 2022 - Cover1
Geosynthetics June/July 2022 - Cover2
Geosynthetics June/July 2022 - 1
Geosynthetics June/July 2022 - 2
Geosynthetics June/July 2022 - 3
Geosynthetics June/July 2022 - 4
Geosynthetics June/July 2022 - 5
Geosynthetics June/July 2022 - 6
Geosynthetics June/July 2022 - 7
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Geosynthetics June/July 2022 - 9
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Geosynthetics June/July 2022 - 12
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Geosynthetics June/July 2022 - 14
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Geosynthetics June/July 2022 - 29
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Geosynthetics June/July 2022 - 31
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Geosynthetics June/July 2022 - 33
Geosynthetics June/July 2022 - 34
Geosynthetics June/July 2022 - 35
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Geosynthetics June/July 2022 - 37
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Geosynthetics June/July 2022 - 40
Geosynthetics June/July 2022 - 41
Geosynthetics June/July 2022 - 42
Geosynthetics June/July 2022 - 43
Geosynthetics June/July 2022 - 44
Geosynthetics June/July 2022 - Cover3
Geosynthetics June/July 2022 - Cover4
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