A Survey of Stormwater Infiltration Basins in the Puget Sound Region

by Karin Hilding, (A.M.ASCE), Univ of Washington, Seattle, United States,
Rich Horner, (M.ASCE), Univ of Washington, Seattle, United States,



Document Type: Proceeding Paper

Part of: Water Policy and Management: Solving the Problems

Abstract:

A survey of 23 infiltration basins in the Puget Sound area was conducted to gain information on the performance of these systems and the degree of compliance with state agency guidelines. The purpose of this study was to collect information about the types of systems that exist in the Puget Sound region and to evaluate the performance and maintenance of these systems. This survey was undertaken because there has been little information on the performance of infiltration basins in the Puget Sound region, even though the Washington State Department of Ecology has listed infiltration systems as the preferred method for managing stormwater. Information from the pond survey was compiled to find the proportion of those surveyed with various operating problems. Information on county maintenance procedures was also collected and the maintenance programs were compared. Compliance of pond designs was checked with Washington State Department of Ecology guidelines for four site characteristics: infiltration rate, soil texture, time for the basin to drain, and presence of pretreatment.

Subject Headings: Recharge basins | Stormwater management | Retention basins | Maintenance and operation | Drainage basins | Surveys (non-geomatic) | Soil properties

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