Ocean Beach Erosion Protection Measures - Immediate Action Plan
The San Francisco Public Utilities Commission (SFPUC) has been working to develop short and long-term coastal protection measures and a management strategy that protects critical wastewater infrastructure and promotes environmental stewardship for chronic erosion problems at the south end of Ocean Beach. These short and long-term measures would be implemented as a two-phased approach.
Phase 1 (short-term) is a continuation of sand management activities conducted in cooperation with The National Park Service (NPS). Work will begin Tuesday, February 16, 2016. These efforts area a repeat of the successful short-term actions taken in past years in which excess sand in front of the O'Shaughnessy Seawall (north Ocean Beach) was transported to the erosion hotspot south of Sloat Boulevard (south Ocean Beach.)
Work will occur weekdays from 6am - 5pm through April, 2016. Southbound traffic on the Great Highway will be detoured to Sunset Boulevard between Lincoln Way and Sloat Boulevard); northbound traffic and Muni bus stops will remain unaffected. To protect public safety, signs will be posted limiting access to the beach to designated stairwells along the O'Shaughnessy Seawall during work hours. Parking areas at the south end of the O'Shaughnessy Seawall and south of the Sloat parking lot will not be available during construction. The Sloat parking lot will remain open to parking.
The placement of excess sand at the south of Sloat Boulevard is an important action to protect the Lake Merced Transport Tunnel, a critical piece of infrastructure under the Great Highway that transports wastewater flows from the west side of the city to the Oceanside Wastewater Treatment Plant. Placing sand in this erosion hotspot also avoids the use of hard engineered structures such as rock revetments.
This year's project includes the following components:
>Sand Backpass - Approximately 25,000 cubic yards of sand will be excavated from north Ocean Beach along the O'Shaughnessy Seawall and placed south of Sloat Boulevard
>Wind-Erosion Control Measures - Natural brush fencing or other measures may be installed to reduce windblown sand from being transported onto the parking lots and Great Highway south of Sloat Boulevard.
>Sandbag Filling and Storage - The SFPUC will procure, fill and store 750 sandbags at the San Francisco Zoo property to allow quick placement in order to protect critical wastewater infrastructure in the event an erosion hot spot develops.
Phase II (long-term; anticipated in 2021) would address public access, environmental protection and infrastructure needs in the context of erosion and climate-related sea level rise. The work would involve the implementation of coastal management strategies that include managed retreat, beach nourishment, and structural protection through adaptive management. The long-term plan proposes removal of existing coastal armoring and installation of a subsurface, low-profile structure that would protect vulnerable segments of critical wastewater infrastructure south of Sloat Boulevard. The design, environmental review, and permitting of Phase II are expected to take approximately 5 years to complete.
This project is part of an interim solution for the erosion issues at Ocean Beach. In support of a comprehensive solution to the erosion problem, the SFPUC and NPS actively participated in the development of the 2012 Ocean Beach Master Plan (OBMP). The OBMP, led by SPUR, was an interagency effort to develop a sustainable long-term vision for Ocean Beach, addressing public access, environmental protection and infrastructure needs in the context of erosion and climate-related sea level rise.
For more information on the Ocean Beach Master Plan, please visit:
NPS Project Manager - Steve Ortega