The City of Portland has adopted an updated version of its Stormwater Management Manual (SWMM). The manual details stormwater management requirements for all Portland development, redevelopment, and improvement projects on private and public property and in the public right-of-way. The revised manual is consistent with current regulatory requirements and policies.

The City of Portland requires development and improvement projects to manage stormwater runoff on-site. The manual shows developers and property owners a variety of methods to reduce the impact of stormwater runoff on sewer systems, groundwater, rivers and streams. Examples of approved stormwater management facilities include landscaped swales, stormwater planters, vegetative filters, and landscape or underground infiltration.

The city adopted the original Stormwater Management Manual in 1999 to reduce stormwater impacts and guide stormwater management at development and redevelopment sites. The city issued revised versions in 2002, 2004 and 2008.

Project designers have the option of using the 2008 Stormwater Management Manual or the 2014 manual until April. After April 2, 2014, designers must use the 2014 manual.

The 2014 manual, and the 2008 version, are available for download at www.portlandoregon.gov/bes/SWMM. Free compact disc versions are available at the Development Services Center,1900 SW 4th Avenue in Portland or by calling 503-823-7103.

For more information contact Linc Mann, 503-823-5328.

The Bureau of Environmental Services provides city residents with Clean River programs including, water quality protection, wastewater collection and treatment, and sewer installation.

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