Here in Kitsap County, we’ll hear a lot about Low Impact Development over the coming years due to new regulations that will affect construction, including residential construction projects. If you’re planning to build a new home, you’ll want to know what these regulations are.

So what exactly is Low Impact Development (LID)? Kitsap County defines LID as “a stormwater management strategy that mimics natural drainage systems at or close to the point of generation in order to limit potential contact with pollutants and enhance stormwater quality.”


Captured water goes back into the groundwater supply after being filtered.              Photo courtesy SvR Design Company.

It involves land planning and design approaches with these specific goals in mind:

  • Protect our local water quality
  • Preserve wetland and stream functions
  • Encourage aquifer recharge where appropriate
  • Provide cost-effective stormwater management solutions

Since Kitsap County receives 80 percent of its drinking water from its groundwater supply, it’s critical that our water table is protected and preserved.

Now that the economy has bounced back, we’re seeing a lot of development happening in Kitsap County. What typically occurs with new development is that native soils and vegetation, along with bird and wildlife habitats, are replaced by impervious asphalt and concrete surfaces. Just think of the wetland area that’s now home to the new Safeway in Poulsbo. Or the vegetation that was cleared for the new shopping center currently under construction in Silverdale at Greaves Way and Highway 3.

permeable paving

Permeable paving is an environmentally responsible alternative to concrete and asphalt surfaces.

Asphalt and concrete surfaces result in stormwater runoff which now must be managed through design practices that reduce, treat, and infiltrate runoff through bioretention swales. Permeable paving is another major category of LID and it’s pretty remarkable to see how effective it can be. You can see it for yourself at the YMCA in Silverdale. The entire parking lot there consists of permeable paving.

Statewide Washington LID Training Programs have begun this year, and Colby is currently enrolled in WSU’s LID Technical Workshop Series and will be certified by the end of 2014. The goal of these workshops is to give designers and builders the technical education necessary to properly design, construct and maintain LID facilities.

The workshop agendas focus on:

  • Bioretention
  • Permeable Paving
  • Green Roof, Low Impact Foundations & Rain Water Collection
  • Site Planning

We’re incredibly excited that Colby is growing his knowledge about Low Impact Development and that we as a company are keeping abreast with the latest changes in construction regulation happening here in Kitsap County.

Ultimately, these measures are in place to protect our water and natural habitats by developing new areas in an environmentally responsible manner. Water is an incredibly important resource to us, our fish and wildlife, and future generations, and now is the time to protect it.

To learn more about Low Impact Development, click here.

Thanks for reading our blog.  Northwest Construction & Landscape, LLC is a Kitsap County landscaping company that offers landscaping, decorative concrete and lawn maintenance services to homes and businesses across Kitsap and Pierce counties.