2008 city of portland stormwater management manual

All properties with impervious surfaces generate stormwater runoff. Our stormwater regulations protect people, property, and the environment from damage caused by stormwater runoff. In general, greater amounts of impervious surfaces result in greater volumes of stormwater and more potential pollutants. The organic mulch layer prevents soil bed erosion and retains moisture for plant roots. Portland s stormwater management manual is an example of a thorough document with policy and design requirements developed for a municipality west of the cascades. Stormwater regulations and permits the city of portland. Portland s investments in stormwater projects and programs are in response to these regulations as well as our local goals. The city of south portland must comply with state and federal regulations to reduce the harmful effects of stormwater runoff. The city of tacoma regularly updates its stormwater management manual previously called the surface water management manual to comply with the most recent national pollutant discharge elimination system npdes permit, to clarify information and to incorporate updated policies. City stormwater management manual updated daily journal. Planycs water quality goal is to improve public access to our.

Source control measures source control principles source control measures are designed to prevent pollutants from contacting site runoff, leaving the. Environmental services provides city of portland residents with clean river programs, including water quality protection, wastewater collection and treatment, and sewer installation. Portland manages stormwater as a valuable resource through green infrastructure, along with pipes, sumps and. Rain washes over these hard surfaces and becomes stormwater. The stormwater management manual swmm allows the city of portland to protect both watershed resources and infrastructure investments with every development or improvement. Official website for the city of sandy, oregon stormwater. The swmps and any departmentapproved amendments thereto, are hereby incorporated into the permit by reference. Portland is known for the rain we receive 37 inches of rain in an average year. Stormwater manual table of contents minnesota welcome to the minnesota stormwater manual website. Update to the stormwater management manual city green. Posts about stormwater written by city of portland, tn. City of portland stormwater management manual august 2016 c1 appendix c. Our stormwater codes also satisfy the city s obligation to comply with our municipal stormwater discharge national pollutant discharge elimination system.

Examples of approved stormwater management facilities include landscaped swales, stormwater planters, vegetative filters, and landscape or underground infiltration. The city has adopted the 2008 city of portland stormwater management manual as the design manual of bmp design. Eugenes stormwater management manual july 2008 was adopted concurrent with the ordinance for stormwater development standards for designing, operating and maintaining approved stormwater facilities. From january 2, 2014 project designers had the option of using the 2008. New york state stormwater management design manual references cerrelli, g. Eugenes stormwater management manual is a modified version of portlands stormwater management manual. The city of portland adopted the revised swmm on january 2, 2014. The requirements in the manual apply to all development, redevelopment, and improvement projects within the city of portland on private and public property and in the public rightofway. Beginning on april 2, 2014, project designers must use the 2014 swmm. Stormwater facility science the surface area of a typical stormwater facility allows runoff to pond and evaporate while sediments settle into a layer of mulch. Urban stormwater management rebecca leonardson rui teles brooke ray smith. Sand filters, like planter boxes, are structural reservoirs that filter pollutants from stormwater and slow water runoff. The portland manual is the result of significant investment, research, and field testing and is a valuable resource for other communities and agencies in the state.

Stormwater management is a toolbox of methods used to improve water quality and reduce the quantity and rate of stormwater runoff to protect streams, aquatic life and human health. Resources and references this appendix provides references for city program and regulations relating to the design, construction, permitting and maintenance of stormwater management and conveyance facilities. The city requires all new developments to treat and detain stormwater from the 2, 5, 10 and 25 year storm events to predevelopment conditions, as defined in the city of portland stormwater management manual. But in the city, streets, buildings and parking lots cover the ground. Examples of green stormwater management permeable paving for infiltration. Page 1 of 3 updated 2122016 property owner responsibilities for stormwater management facilities in the city of portland did you know that since 1999 the city of portland has required the building and maintenance of. Infiltration sand filters allow water to infiltrate through the sand and into the ground.

Stormwater management the city of portland, oregon. Environmental services revises the stormwater management manual to. From city of portland 2004 stormwater management manual. City of south portland stormwater management program. We were originally richland station, named for the railroad depot erected here for the thennew louisville and nashville railroad, with its first scheduled stop in the small settlement on october 31, 1859. See the portland stormwater management manual for a more comprehensive list of appropriate plants. Property owner responsibilities for stormwater management. Stormwater quality design manual for the sacramento region july 2018 page 41 chapter 4. Stormwater is rain or snow melt that runs over impervious surfaces such as streets, parking lots, driveways, and roof tops. Project designers have the option of using the 2008 stormwater management manual or the 2014 manual until april. As each project meets the requirements of this manual, it will contribute to achieving these important citywide goals. In response to these regulations, the city established stormwater management performance standards in april 2009 and more recently was awarded funding from casco bay estuary partnership develop a webbased stormwater management manual. A soakage trench is a shallow trench in permeable soil that is backfilled with sand and coarse stone, and lined with filter fabric. The 2016 stormwater code and manual became effective on january 1, 2016.

The federal clean water act, safe drinking water act, and endangered species act require the city to manage stormwater runoff to protect water quality in rivers and streams, protect watershed health, and protect groundwater as a drinking water resource. Environmental services completed revising the stormwater management manual in 20 to meet current regulatory requirements and recently adopted policies. Stormwater and grading design standards city of oregon city. The 2018 swmm updates and consolidates stormwater management requirements previously located. The city of portland offers several ways to pay your bill. In a natural environment, soil and plants would absorb most of that. Environmental services manages the city s stormwater system and works with residents, businesses and property owners to reduce stormwater pollution, promote private stormwater management and protect our rivers, streams and groundwater. Environmental services revises the stormwater management manual to meet current regulatory requirements and to provide current technical standards. Water from rooftops is diverted into the trench, where pollutants are filtered from the water and groundwater is recharged through infiltration. The portland manual is the result of significant investment, research.

Soakage trenches official website for the city of sandy. Use this pdf to track your time and work pdf document, 2kb category. There is a direct link between stormwater runoff and the city s surface and ground water quality and quantity. Overview on october 3, 2016, the city of portland board of mayor and alderman passed ordinance no. The swmp is the proposed swmp submitted with the npdes permit reapplication and amendment received by the department on august. Inka bajandas in architecture and engineering january 16, 2014 12. This manual of stormwater best management practices supports the city and borough of juneaus cbjs building regulations excavation and grading code 19. This sustainable stormwater management plan is a key initiative of planyc, the city s plan for a greener, greater new york. As design standards for stormwater quality, the city engineer will accept stormwater quality facilities designed pursuant to the policies and procedures of the city of portland bureau of environmental services bes i n its stormwater management manual.

In january 2014, the city released an updated version of the swmm. As of january 2, 2014 project designers have the option of using the 2008 stormwater management manual or the 2014 swmm. Official website for the city of sandy, oregon sand filters. Stormwater management manual the city of portland, oregon. Stormwater division objective oregon city provides a safe and reliable stormwater system and implements watershed protection and restoration actions that consistently promote surface water quality and stream health.