WSDOT strives to deliver effective transportation solutions while minimizing effects on the community and natural surroundings. Our environmental analysis will ensure that environmental values are integrated along with other factors in planning, design and construction phases of the SR 520 Bridge Replacement and HOV Program.
Follow the below links for detailed information for each project of the SR 520 program:
- I-5 to Medina: Bridge Replacement and HOV Project
- Medina to SR 202: Eastside Transit and HOV Project
- Pontoon Construction Project
Which environmental topics does WSDOT evaluate?
|• Air quality |
• Community effects
• Construction effects
• Environmental justice
• Geology and soils
|• Hazardous materials |
• Historical and archaeological resources
• Land use
• Navigable waterways
• Public services and utilities
|• Recreation |
• Tribal fisheries and cultural resources
• Visual quality
• Water resources
What are NEPA and SEPA?
NEPA is the National Environmental Policy Act, and it went into effect in 1970. It established a process to ensure that information on the environmental effects of a federally funded project is available to the public and decision-makers before a project is implemented. For large projects, NEPA requires the preparation of an environmental impact statement that evaluates environmental effects and identifies any reasonable alternatives that could eliminate or reduce these effects. Smaller projects, or those with fewer impacts, may be required to develop an Environmental Assesment, or qualify for a categorical exclusion.
Washington's State Environmental Policy Act legislation went into effect in 1971 and established an environmental review process consistent with NEPA for all state projects that are likely to have significant effects on the environment.