Stormwater and surface-water management in Tualatin is governed by Tualatin Municipal Code Title 3, Chapter 3-05 (Surface Water Management and Water Quality), under a co-implementation partnership with Clean Water Services (CWS), the regional sanitary and surface-water utility for the Tualatin River Watershed. New development and redevelopment must meet CWS Design and Construction Standards, including erosion-prevention and water-quality requirements, and obtain a CWS Service Provider Letter through the city permit process.
Tualatin Municipal Code Title 3 (Utilities, Water and Water Quality) Chapter 3-05 establishes the city's surface-water management, water-quality, and erosion-control framework. The City of Tualatin is one of 12 Clean Water Services member cities; under an intergovernmental agreement, Clean Water Services owns the regional sanitary sewer and surface-water systems while the City operates and maintains the local collection systems and reviews development for compliance. Clean Water Services' Design and Construction (D&C) Standards describe the administrative and technical requirements for sanitary sewer, surface water management, and erosion control on all residential and commercial projects in Tualatin. Erosion control measures are governed by CWS D&C Standards Chapter 6 and the CWS Erosion Prevention and Sediment Control Manual; an Erosion Control Permit is required for ground-disturbing work. For larger projects, the developer must obtain a CWS Service Provider Letter confirming feasibility of sanitary and stormwater service before the City will issue building or site-development permits. The Low Impact Development Approaches (LIDA) Handbook, jointly published by CWS and member cities, sets the design palette for on-site stormwater treatment (rain gardens, swales, pervious surfaces). Illicit discharges of pollutants to the public storm system are prohibited under TMC Chapter 3-05's water-quality protections, consistent with the city's federal NPDES MS4 permit obligations.
Discharging pollutants to the storm system, failing to install or maintain erosion control measures, or constructing without a required Erosion Control Permit or CWS Service Provider Letter violates TMC Chapter 3-05 and the CWS Design and Construction Standards. Enforcement actions can include stop-work orders, mandatory cleanup, civil penalties under the city's civil-infraction process (TMC Title 7), and cost recovery for any pollutant cleanup performed by the City or CWS. Repeated or willful illicit discharges can also trigger federal Clean Water Act enforcement by ODEQ or EPA.
Tualatin, OR
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Tualatin, OR
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Tualatin, OR
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Tualatin, OR
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Tualatin, OR
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Tualatin, OR
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