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Monday August 3rd
Stormwater Low Impact Development

Water Quality Improves Using Stormwater Low-Impact Development (LID) Approaches

Oregon City is working on stormwater low-impact development (LID) standards, designed to both reduce surface water runoff and to strip surface pollution from the runoff before it reaches our rivers and streams. LID has proven to be an effective tool which property owners and stormwater management agencies like Oregon City are using to manage rainfall runoff.

What is an LID standard for stormwater management? Here are some stormwater LID techniques approved for use by property owners who live in Oregon City:

  • Porous Pavement – Typically a walkable or drivable hard surface that looks similar to a traditional finish but allows water to infiltrate through the surface and into the underlying soil or drainage media.
  • EcoRoof – Also called a green roof; an EcoRoof is a lightweight vegetated roof system consisting of waterproofing material, a growing medium, and specially selected plants.
  • Flow through planter – A planter with an under drain system which is piped downstream. The planter holds some water but acts more like a filter.
  • Infiltration planters – Like a flow through planter minus the under drain. Infiltration planters need well drained soils.
  • Swales – Typically a long, narrow, gently sloping, landscaped depression that collects and conveys stormwater runoff. Usually swales include specially selected plants.
  • Rain gardens – Similar to a swale but larger with more specially selected plants.
  • Vegetated filter strips - Gently sloped areas designed to accept sheet (heavy water) flow. Filter strips are usually covered with grasses and groundcovers.

With the approval of these new techniques, property owners can reduce the amount of impervious surface on their property, they can retain rainwater close to where it falls, and they can mimic natural drainage (filter) systems. More property owners than ever have made it a personal priority to reduce or improve the quality of their own stormwater runoff.