Skip to Content

I-605/I-5 Interchange Improvement Project Process

Project Status and Environmental Process

The project is currently in the Project Approval & Environmental Document phase (PA/ED or the “environmental phase”).  Several alternatives were identified in the initial Project Study Report.  Environmental studies, technical studies, and design considerations are now being undertaken to further evaluate various project alternatives.  At the end of PA/ED, an Environmental Impact Report/Environmental Impact Statement (EIR/EIS) will be prepared and the preferred project alternative will be selected.  The EIR/EIS is a legal joint document required under the California Environmental Quality Act and the National Environmental Policy Act (CEQA/NEPA), respectively. It will include a comprehensive description of the project and proposed alternatives, evaluate the project’s effects on the environment, and inform decision-makers and the public of reasonable mitigations, if any, that could minimize or avoid adverse impacts.  A draft EIR/EIS will be publicly circulated for comment prior to completing the final environmental document.  PA/ED is anticipated to take about 48 months.

The environmental process addresses a variety of issues related to the natural environment and human community such as traffic, air quality, water quality, noise, visual, endangered species, climate change, construction, and cumulative impacts with other projects in the area.  For this Project, it is anticipated that, in addition to the standard studies, special attention will be paid to:

  • Impacts on neighboring properties, the San Gabriel River, and local recreational facilities
  • Visual aesthetics of the structures and landscaping
  • Hazardous waste
  • Cumulative impacts from the I-5 Corridor Project and local street projects
  • Temporary traffic impacts and noise levels during construction

[Insert PA/ED Graphic, Marketing has this]