Bay Area Parks & Recreation

Alcatraz Island Cliff Stabilization

OVERVIEW
The National Park Service is evaluating options for protection and preservation of cultural and natural resources at one of its most popular parks. Natural erosion of the cliff face over time is encroaching on the historically significant features of the former prison site. The Langan team performed a 3D laser scan of the cliff face at the island's southern end. The scan provides a baseline of the existing condition as well as detailed imaging and linear information used to evaluate the structure of exposed rock. Our recommendations included combinations of steel rock bolting and face treatment via high-strength steel mesh netting and shotcrete. The cliff stabilization was carried out in two phases during which we provided construction administration and quality control services.

Location
Alcatraz Island, San Francisco Bay, CA

Clients
National Park Service
Wiss, Janney, Elstner Associates

Services
Geologic Hazards
Geotechnical
Site/Civil
Terrestrial Scanning/BIM


Battery East Vista

OVERVIEW
Langan provided environmental site characterization, soil remediation, and risk assessment services for the improvement project at the historic Battery East Vista, located southeast of the Golden Gate Bridge toll plaza. The Battery East Bay Trail was expanded and a scenic overlook and landscaping was constructed over a historic landfill.
AWARDS
2016 ASCE San Francisco, Top Parks and Recreation Project

Location
San Francisco, CA

Client
Golden Gate National Parks Conservancy

Service
Environmental


Sutter’s Landing Park

OVERVIEW
Located in an urban setting, Sutter's Landing is the transformation of a former landfill into a public park. The park includes basketball and bocce ball courts, a dog park, restrooms, shade structures, and a river access trail, with pedestrian and bike pathways, along the top of the American River levee. Langan conducted a geotechnical investigation and provided testing and consultation during construction.

Location
Sacramento, CA

Client
City of Sacramento Department of Parks and Recreation

Service
Geotechnical


Campus for Wildlife Care

OVERVIEW
This project consisted of developing the Campus for Wildlife Care and Rehabilitation on an approximately 170-acre site on the northeast side of Congress Springs Road (Highway 9). Unique geotechnical challenges include an extensive quarrying history, the presence of significant amounts of undocumented fill, and multiple traces of the San Andreas fault extending through the site. Langan performed a geologic and geotechnical investigation of the site, which included geologic mapping, fault trench exploration, laboratory testing and slope stability analyses. Langan also provided observation services during construction to repair portions of the main access road throughout the property, which had been damaged by landslides.

Location
Saratoga, CA

Client
Peninsula Humane Society

Services
Geologic Hazards
Geotechnical


EcoCenter

OVERVIEW
Located at Heron's Head Park, a former landfill, this urban educational center was built using recycled materials, boasts a vegetation roof, operates 100 percent by solar power, and features its own on-site wastewater treatment system. Langan provided geotechnical and methane mitigation design services for the EcoCenter. Our recommendation for a shallow mat foundation for the structure was a cost-effective and efficient solution as opposed to the more expensive pile foundation typically found beneath structures on closed landfills.
AWARDS
2010 US Environmental Protection Agency, National Achievements in Environmental Justice Award

Location
San Francisco, CA

Clients
Literacy for Environmental Justice
The Port of San Francisco

Services
Geotechnical
Environmental

Strategic Partner
KLM Builders


Aquatic Park Promenade

OVERVIEW
The Aquatic Park Promenade underwent extensive construction to improve pedestrian safety: removing historic railroad rails, ties, walls and storm drains; resurfacing the promenade; and constructing retaining walls, handrails, and pedestrian and bicycle trails. The promenade was built in the 1930s as part of the Works Progress Administration (WPA) program and is a National Historic Landmark. For the 1,300 feet long, 20 feet wide promenade, Langan conducted geotechnical and environmental site investigations, prepared a Soil Management Plan, and provided consultation services during construction. 

Location
San Francisco, California

Clients
Wiss, Janney, Elstner Associates
AMA Diversified Construction Group

Services
Geotechnical
Environmental


Middle Harbor Shoreline Park

OVERVIEW
Park development included an open field at the center of Point Arnold, picnic and parking areas, a restroom building, a fountain, seawalls, and a terraced stairway to the beach. A promenade consists of a public beach, sheltered shoreline coves, and marshes. The park transitions to shoreline coves and marshes are part of public access to the Bay. The area for the Promenade was underwater and filled with dredged material.  Langan conducted the geotechnical investigations for the Park. Our role including evaluating the static and seismic stability of the shoreline coves and proposed building areas.

Location
Port of Oakland, California

Client
Port of Oakland

Service
Geotechnical

Strategic Partner
Olivia Chen Consultants


Union Point Park

OVERVIEW
Improvements for the 9-acre waterfront park development on the Oakland Estuary include a 20-foot-high landscaping mound, a pedestrian bridge, an over-water art structure, and other landscaping mounds and improvements. Union Point Park is owned and operated by the City of Oakland. The site was underlain by weak fill and compressible Bay Mud. As the geotechnical engineer, we recommended staged construction of the 20-foot hill to avoid bearing capacity failure of the Bay Mud; for geogrid-reinforcement of the steepened slopes on the hill; and for shallow and deep foundation design for the bridge and sculpture. Langan also managed geotechnical services during construction.

Location
Oakland, California

Client
The Unity Council

Service
Geotechnical


Casa Grande in New Almaden

OVERVIEW
Langan performed the geotechnical investigation and consultation for the renovation of the Casa Grande in the New Almaden District for expanded museum use.  The rehabilitation included construction of in-fill walls and other small structural elements, and also included installation of a braced frame to seismically strengthen the structure. The purpose of our study was to address the geotechnical and seismic hazard issues at the site and provide geotechnical recommendations for new foundations to support new structural elements.

Location
Santa Clara County, California

Client
County of Santa Clara, Parks & Recreation Department

Service
Geotechnical


Lyon Street Steps

OVERVIEW
Langan provided site/civil and geotechnical engineering services to support the ongoing reforestation efforts within the Presidio. Our team evaluated the stability of the existing Lyon Street retaining wall and the slopes behind and above the wall. The project involved a great deal of coordination among public agencies, regulatory agencies, and citizens since Lyon Street Steps is located on federal land and adjacent to private residential property.

Location
San Francisco, California

Client
The Presidio Trust

Services
Site/Civil
Geotechnical


Selected Projects