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L - Walls

L - Walls. DESCRIPTION: Patented Waterfront sea walls or bulkheads Applications: Bank stabilization Retaining Wall 4 tons for a section and 4.7 tons for a corner 8’ long X 5’9” wide X 7’4” high 5,000 psi - DOT bridge grade concrete Installation Base: 2007 Number of sights 36

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L - Walls

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  1. L - Walls • DESCRIPTION: • Patented Waterfront sea walls or bulkheads • Applications: • Bank stabilization • Retaining Wall • 4 tons for a section and 4.7 tons for a corner • 8’ long X 5’9” wide X 7’4” high • 5,000 psi - DOT bridge grade concrete • Installation Base: 2007 • Number of sights36 • Cumulative feet 7,700 • First Installed 1994 Face Base Angled Splash Plate Key BEFORE AFTER Sources:(1)http://www.seament.biz/,

  2. T - Walls • DESCRIPTION: • Groins (placed perpendicular to bulkheads) • Applications: • To trap and hold sand • Low Bulkhead • Retaining wall • 1 Ton each • 10’ long X 2’6” wide X 2’9” high • Type A unit has angled cut-out to fit up against bulkhead • Type B unit is a plain rectangle • Type C unit has tapered seaward end (prevent eddies) • 5,000 psi - DOT Bridge Grade Concrete • Installation Base: 2007 • Number of Sights28 • Cumulative Feet 3500 • First installed in 1994 BEFORE AFTER Sources:(1)http://www.seament.biz/

  3. Sealogs • DESCRIPTION: • Mat of concrete logs wired together • Applications: • To form submerged end of boat ramps • To provide scour protection from waves • 160 pounds each • 8’ long X 4’ wide mat of 8 logs • 5,000 psi - DOT Bridge Grade Concrete • Installation Base: 2007 • Number of Sights6 • Cumulative Feet  84 4’x8’ mats • First installed in 1995 Sources:(1)http://www.seament.biz/

  4. Hex Box segmented breakwater unit Aug 9, 2007 Aug 14, 2007 Aug 22, 2007 May 23, 2008

  5. Hex Box Characteristics • Dimensions: 8’ long, 3’ to 7’ wide, height 4’ to 6’ • Weight varies with height, from 3.6 to 4.5 tons. • 11% porosity of wall face from 12” Dia. holes gives wave reflection coefficient of .3 with a 25 foot wave length. This is less than a 1:2 slope rock breakwater and does not consider the extra effects of the angled face on reducing reflection effects. • No steel in concrete, Synthetic structural fibers used for reinforcement of the 5000 PSI concrete. • Tongue and groove slots in ends lock each box to its neighbor as well as two concrete pins that are driven down through the floor of the box into the riverbed to hold their position.

  6. Hex Breakwater Layout The inside of a hex box fills with sand and allows recruitment of plants and animals in a sunlight, calmer environment. Hex boxes have a higher replacement habitat value than rock, while allowing animals to pass through the large holes in the box’s walls.

  7. The Seament Sill box is a 8’ long open topped box, height from 2’6” to 4’ and width of 3’ to 4’6”. It weighs from 1 to 2 tons empty and can be floated into position without damaging existing marsh or SAV. The open top box allows SAV and grass to grow inside the box and the large holes allow animals to easily move between the water and marsh. The wave reflection of the box, with the holes in the face should be equal or lower than a comparable stone sill of 2 to 1 slope.

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