Coast Boulevard Emergency Sea Cave Stabilization

The City of San Diego’s Coast Boulevard Sea Cave Emergency Stabilization project addressed an eroding sea cave and improved the storm drain system, roadway, and sidewalks impacted by construction. Dudek provided storm drain system design, aerial surveying and mapping, water pollution control planning, and construction monitoring.

Project Facts

City of San Diego

La Jolla, CA

Completed within three months

Multi-award winner locally, regionally, and nationwide

Mouth of the sea cave at the site of the Coast Boulevard Emergency Sea Cave Stabilization project

The Challenge

A portion of Coast Boulevard near La Jolla Cove was closed due to ongoing cave erosion underneath the roadway. The cave and road needed to be stabilized quickly to ensure public safety and minimize the impacts of the closed road on local businesses and residents during peak tourist season. The three-month construction schedule would also require extensive coordination between the City and construction, design, and environmental monitoring teams.

Pipeline under construction at the site of the Coast Boulevard Emergency Sea Cave Stabilization project

The Solution

Dudek’s engineers designed the storm drain system improvements, including implementation of a Green Street Best Management Practice (BMP), roadway improvements, and the construction BMP plans. The storm drain design included replacing two existing storm drain systems and outlets with one new storm drain system and a new single outlet to the ocean.

The roadway design included removing substandard base materials and recreating the historic concrete pattern along portions of the roadway, enabling it to tie seamlessly with future planned improvements. We also conducted aerial surveying and mapping, prepared a water pollution control plan, and conducted construction inspections.

Construction workers lay roadway at the site of the Coast Boulevard Emergency Sea Cave Stabilization project

The Impact

The project was recognized by several organizations in 2020, receiving awards including:

  • Project of the Year: American Public Works Association (APWA)
  • Disaster/Emergency Project of the Year: APWA San Diego and Imperial Counties Chapter
  • Small Project (under $10M) Award of Merit: US Best of the Best List, Engineering News-Record (ENR)
  • Small Project (under $10M) Award of Merit: Best Regional Project List, ENR
  • Outstanding Geotechnical Project: American Society of Civil Engineers

Stabilizing the Cove and Roadway

See how this award-winning emergency project was accomplished, with an overview of Dudek's role from our engineering project managers.

What We Did

Our multidisciplinary specialties allow us to provide efficiencies that maintain project momentum.
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