Waterfront Erosion Control

   Waterfront
Erosion Control

Certain
parts of the Puget Sound shoreline are subject to high rates of
erosion. Areas with high banks, areas adjacent to open water,
and areas subject to prevailing winds can erode over 10 feet in
a single year. Such areas are often important feeders of sediment
for our beaches. We can inadvertently accelerate this erosion
by clearing shorefront areas, altering marshes, building close
to the shoreline, and by boating.

Shoreline
and streambank erosion control share many of the same techniques.
Structural solutions to shoreline erosion control, such as rock
bulkheads, can be expensive, work with varying success, and can
cause erosion along other parts of the shoreline. Vegetative planting
is less expensive and, in many situations, can be just as effective
as structural solutions. Vegetation cannot provide protection
in severe exposure and requires more maintenance and protection
from human disturbance. In your planning, again recognize that
erosion is a natural process with some real benefits. Your goal
should be to stop excessive erosion.

  • the shoreline
    is adjacent to less than three miles of open water,

  • there
    is more than four hours of sunlight daily,

  • there
    is a minimum distance of ten feet between the toe of the bank
    and the high tide line, and

  • the soil
    is sandy.

  •  

    If
    the shorefront meets these conditions, vegetative planting may
    be a feasible alternative to structural erosion control. Only
    a few tolerant plants will grow in this shoreline zone. Each plant
    has its natural place in the shoreline environment. Get expert
    technical advice before attempting to plant along the shoreline
    in your area
    .

  • Contact
    the Department of Fisheries Volunteer Fisheries Resource Program
    at (206) 586-3944 for information about incubating salmon eggs
    in your local classrooms and about other stream enhancement
    projects.



  • Ask your
    local government these questions – “Is it possible to use less
    asphalt, more pervious surfaces?”- -“Why not let that roadside
    vegetation grow to reduce runoff rates and filter pollutants
    rather than cut it down?”



  • Financial
    assistance for farmers wishing to reduce water pollution is
    available from the Department of Ecology, call (206) 459-6067
    for information.