City of portland stormwater manual

Environmental Services provides City of Portland residents with Clean River programs, including water quality protection, wastewater collection and treatment, and sewer installation. What We Do Office of the Director Environmental Policy Division Proposed Stormwater Management Manual Proposed Stormwater Management Manual. Learn. Portland is known for the rain -- we receive 37 inches of rain in an average year. In a natural environment, soil and plants would absorb most of that. But in the city, streets, buildings and parking lots cover the ground. Rain washes over these hard surfaces and becomes stormwater. SW 5th Ave, Suite Portland, OR More Contact Info. Bureau Home. What We Do. Customer Services. Programs. Library. Library Manuals and CADD Support Stormwater Management Manual Stormwater Management Manual.

Portland is known for the rain -- we receive 37 inches of rain in an average year. In a natural environment, soil and plants would absorb most of that. But in the city, streets, buildings and parking lots cover the ground. Rain washes over these hard surfaces and becomes stormwater. SW 5th Ave, Suite Portland, OR More Contact Info. Bureau Home. What We Do. Customer Services. Programs. Library. Library Manuals and CADD Support Stormwater Management Manual Stormwater Management Manual. The Stormwater Management Manual (SWMM) provides policy and design requirements for stormwater management throughout the City of Portland. 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 right-of-way. Environmental Services revises the Stormwater Management Manual to meet current regulatory requirements and to provide current technical standards.

Dec The Stormwater Management Manual (SWMM) became effective Dec, The manual sets City policy and design requirements for. The City of Portland's Maintenance Inspection Program will perform an inspection of all stormwater management facilities constructed after not located. and year storm events to pre-development conditions, as defined in the City of Portland Stormwater Management Manual, and in the City Municipal Code.