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Drainage

Uncontrolled runoff from home sites can trigger small but damaging landslides. Development can cause water quantity and water quality problems. Development effects can be minimized through some thoughtful actions on your part. Remember, more water means more problems with saturated soils and possible gullies.

 

To Limit Runoff:

  • During construction, minimize clearing of trees, shrubs and plants and replant wherever possible.
  • Keep much of your land undeveloped. Even lightly forested areas can absorb tremendous amounts of water during storms and help to reduce runoff.
  • Whenever possible, use porous surfaces ­ such as bricks, flagstone, sand or gravel for driveways, patios, walkways or paths ­ that will allow some absorption.
  • Collect drainage from downspouts and pipe it directly to the base of the bank. Inspect and maintain your drainage systems annually.
  • Don't overwater your lawn. Most lawns need about 1½ inches per week and can only absorb about 3/10 inch of water per hour ­ any more than that and you're wasting water and money and increasing the potential for shoreline damage.

Related Links

Managing Drainage On Coastal Bluffs, Department Of Ecology Careful management of site drainage is the most cost-effective approach to minimizing bluff hazards.

Controlling Erosion Using Vegetation, Department of Ecology. An online guide to controlling erosion on slopes and bluffs using vegetation.  

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Comments? E-mail: Shellyne Grisham