Seawalls & Revetments
Do you have ocean front property or are you thinking about purchasing some? Learn how to protect it from the ocean's pull!
Keep The Ocean Out Of Your Yard
Ocean currents cause beaches and coasts to shift and change constantly. When waves run over beaches, lots of the wave's water is absorbed into the beach. When the water receeds back into the ocean, some sand is pulled out to sea with the water. Erosion of the sand can also suck a number of other unintended things in its wake. With less material there to block the waves, erosion will escalate and more protective elements can wash away.
Being as strong as it is, the ocean can bring almost anything back with it.
There are a variety of ways that coastal land-owners can stop the sea from reaching beyond its normal high water mark and pulling sandy beaches, yards, and even homes back with it. Some methods or materials are more effective than others.
Stopping the Sea From Stealing Your Property
One of the most reliable ways to protect your property is by installing a seawall or revetment on a sloping shoreline to block potentially damaging waves.
Seawalls and revetments are coastal defense installations set into place to protect shorelines from the detrimental impact of tides and waves. They can be constructed out of rock/stone, concrete, wood or even steel. In the video below, we are installing a seawall to protect the houses along the shore of Hampton, NH.
Building An Effective & Economical Solution To Oceanic Erosion
Most frequently, a "toe protection" layer will be set at the bottom to act as a retaining foundation. Smaller stones above the toe protection slow the rush of the rising tides and enable the water to drain back down into the ocean. Larger stones set on top and form an armor layer above (or near) the high water mark to block any waves that rise above the initial layers.
Using natural stone provides an aesthetically pleasing solution and it also has the highest resistance to corrosion from the salt water. Natural stone seawalls and revetments can be built using a couple of different designs and material positions, however, the same integral elements should be in place to maximize the effectiveness.
The US Army Corps of Engineers is a great resource for more information on which option might make the most sense considering your property layout. You can find their 1995 report, Design of Coastal Revetments, Seawalls, and Bulkheads, here.
Eliminating Negative Impacts Of Seawalls and Revetments
Minimizing the negative impacts of a seawall or revetment must be considered in the design. The foundation/toe protection layer must be installed properly to prevent it from washing away and destroying the property that it was meant to protect:The seawall/revetment design engineers also need to take into account the direction of the water's deflection when it impacts the barrier. This redirected water can cause soft spots in the protective barrier that is provided by the seawall/revetment.
Let North Atlantic Excavation Help You!
If you have any questions, concerns, or are interested in having North Atlantic Excavation protect your property from the ocean's impact, please contact us. You can also visit our Facebook page to see our day-to-day projects come together. Our expert team will be happy to help answer any questions you might have.