Shoreline management solutions at work."L" Walls
Each L Wall bulkhead section is a four ton
piece of steel reinforced concrete that is 8 feet long, 7 feet 4 inches
high and 5 feet 9 inches wide. The sections are attached to their
neighboring pieces with four steel channel bars as well as tongue and
groove joints at either end. The concrete is minimum 5000 psi Department
of Transportation bridge grade concrete mix with rebar placed every foot
horizontally and vertically. There are four 3 inch diameter weep holes in
the face of the wall to allow for water to drain out from behind the wall
backed with filter cloth to hold the soil in place. The buried base of the
"L" of the wall stops the wall from tipping forward into the water,
replacing the "tie back or deadman" that other bulkheads use, which often
fail, letting the walls fall over to seaward. 
The buried 1 foot 8 inch deep key at the bottom of
the wall keeps the wall from being pushed out by ground and water pressure
building up behind it. The angled splash plate protruding in front of the
wall deflects breaking waves upward which otherwise would scour out the
sand at the foot of the wall during a storm.
The left and right corner walls are used at the ends of a bulkhead or
to make 90 degree turns in the wall. They have also been used to make a
gap in the wall for a stream to flow out into a river or for boatramps. 
The design is simply a standard L wall with
an extra four foot wall section precast along the edge of the form to make
the corner. They are the heaviest pieces used, with a weight of 4.7 tons.
The bulkhead can also be curved around existing waterfront features using a standard L wall with a 7 degree angle cut out along one side of the form to allow the wall to follow shoreline contours.