Item Th11b San Diego Gas and Electric Substation Relocation Project Chula Vista, San Diego County

Substation Relocation Project Components 1.Demolition of existing South Bay substation 2. Transmission Corridor Improvements 3. Construction of new Bay Boulevard substation

Key Coastal Act Issues Biological Resources Visual Resource

Biological Resources Impacts to vegetation and wildlife – Natural Community Conservation Plan policies – Biological monitoring – Mitigation for impacts to native vegetation Impacts to wetlands – 2.45 acres of existing wetlands will be filled – 10+ acres of restoration at the D Street fill site

Visual Impacts: South Bay Substation Demolition  Improvement to the visual landscape  Consistent with the Chula Vista Bayfront Master Plan Existing Conditions Proposed

Visual Impacts: New Bay Boulevard Substation Generally visually compatible with the character of the surrounding area Consistent with CVBMP Blocks existing views of the Bay across a currently undeveloped site Existing Conditions Proposed

230 kV Undergrounding Underground 300 OR 1000 feet of the incoming 230 kV line

Concerns with Undergrounding 230 kV line Site-specific technical/operational challenges Importance of maintaining feed line above ground Construction-related impacts could be significant Could result in significant time delays

138 kV Undergrounding Proposed Existing Conditions Proposed with Special Condition 14