Permanent Plugging of the Intake and Discharge Tunnels at the El Segundo Generating Station (Environmental Assessment No. 1196 and Coastal Development Permit 17

SCH Number: 2018051046
Lead Agency: El Segundo, City of (City of El Segundo)
Document Title: Permanent Plugging of the Intake and Discharge Tunnels at the El Segundo Generating Station (Environmental Assessment No. 1196 and Coastal Development Permit 17
Document Type: NOD - Notice of Determination
Received: 7/16/2018

Document Description: The use of ocean water for cooling the generators at the site has terminated. As a result, the applicant proposes to permanently seal the intake and discharge tunnels for Unit 3 and 4. Similar to the closure of the intake and discharge tunnels for Units 1 and 2 in 2011. Divers will enter the tunnels via the existing forebay and will install steel dowels into the existing tunnel walls and will weld a steel framework underwater to act as plugs together with an engineered marine concrete that will be used to fill the tunnels. All construction and plugging activity takes place underwater at the site.

Contact Information: Maria Baldenegro
City of El Segundo
350 Main Street
El Segundo, CA 90245
310-524-2341

(1) The project will have a significant impact on the environment: No
(2a) An Environmental Impact Report was prepared for this project pursuant to the provisions of CEQA: No
(2b) A Negative Declaration was prepared for this project pursuant to the provisions of CEQA: Yes
(3) Mitigated measures were made a condition of the approval of the project: No
(4) A Statement of Overriding Considerations was adopted for this project: No
(5) Findings were made pursuant to the provisions of CEQA: Yes