After 18 years of product testing at more than 20 sites on the Chesapeake Bay and its tributary rivers, Beach Prisms™ is now available nationwide for sale and installation. Beach Prisms ™ either slow the rate of erosion, stop erosion or reverse erosion by replenishing sand in front of and behind the Prisms.
Beach Prisms™ is a permeable, precast concrete product that works by reducing the amount of energy in incoming waves before the waves reach the shoreline. Waves pass through the specially designed slots in the triangular 3 - 4 foot tall by 10 foot long Beach Prisms™.
1st picture: Bennett's Point, Queenstown, MD
Installed: June 5, 1986
Note the amount of sand in rear of the Beach Prisms™ and the height of the tire above the sand.
2nd picture: Bennett's Point, Queenstown, MD
Photo: June 12, 1986, 7 days after installation
Note how much sand has accreted in the rear of the Beach Prisms™ compared with the photo taken 7 days earlier. Also note how much more of the tire has been covered by sand.
3rd picture: Bennett's Point, Queenstown, MD
Photo: June 17, 1986, 12 days after installation
Note the amount of sand in rear of the Beach Prisms™ compared to the first two photos. The tire is now completely covered by sand.
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