STATE OF CALIFORNIA, STATE PARKS - Provided geotechnical engineering services in connection with the repair of landslides and associated roadway stabilization, including the Perles Beach and Kayak Beach landslides on Angel Island, the Ridgecrest Road landslide on Mt. Tamalpais, and the Dipsea Trail/Muir Woods Road landslide near Muir Woods. Portions of projects subject to emergency federal funding.
CITY OF NOVATO, PLANNING AND ENGINEERING DIVISIONS, Novato, CA - Provided geotechnical consultation and peer review for numerous projects, including Novato Community Hospital, Marin Country Club Development, Black Point Golf Links, Atherton Ranch, Woodside Development, Olive Ridge, Hamilton Hangers, the Buck Center Housing Development, Inspiration at Chapel Hill, Oleander Lane Subdivision, Olive Court, Brookside Meadows, Marin Business Center and Woodview, and others.
REDWOOD CREEK RESTORATION PROJECT, Muir Beach, CA - Geotechnical investigation and construction observation for a new pedestrian bridge and creek restoration work. Project included an evaluation of liquefaction induced lateral spreading and settlements in accordance with updated California Division of Mines and Geology guidelines, and of developing recommendations for torque-down piles for support of several foot long pedestrian bridge.
IMIGRATION STATION HOSPITAL, Angel Island, CA - Performed geotechnical investigation and provided recommendations for proposed renovations and foundation upgrades to the existing historic structure.
MARIN MUNICIPAL WATER DISTRICT, Marin County, CA Performed geotechnical investigations and provided services during construction and retrofit of numerous large water tanks and pipeline projects. Projects have included Summit Trail Tank Replacement, Vernal Avenue Water Tank, Tiburon First Lift Tank, Lapachet Tank Replacement, Manzanita Tank Replacement, Terra Linda Tank, Bret Harte Tank, Marinwood Tank, Scott Tanks #1 and #2, Concrete Pipe Road Pipe Replacement Project, Rafael Highlands Tank, Phoenix Lake Access Road Stabilization, Oak Springs Drive Landslide/Pipeline Realignment, Sky Oaks Road Stabilization, and others.
TOWN OF CORTE MADERA, Corte Madera, CA - Provided geotechnical engineering services for remedial and capital improvement projects for the Town of Corte Madera, including Fire Station #13 Replacement, Montecito Drive Retaining Wall, Sewer Replacements (Oakdale Avenue, Manzanita Avenue, Alta Way), Storm Drain Replacements (Meadowsweet Drive, Corte Madera Avenue), Shorebird Pump Station, District No. 1 Main Replacements, Alta Way Roadway Stabilization, Redwood Avenue Retaining Wall, Bayside Trail/San Clemente Park, Corte Madera Skate Park and others.
SAN JOSE REGIONAL LANDSLIDE STUDY, San Jose, CA - Detailed evaluation of the stability of numerous active, deep-seated landslides in the San Jose East Foothills, including the over 300-foot-deep Penitencia Creek Landslide. Study included reviewing hundreds of geotechnical and geologic reports prepared in the Special Geologic Hazard Area, compiling and evaluating existing laboratory test data and analysis procedures, analyzing earthquake site response, slope stability and earthquake induced deformations of existing slopes, and developing recommended geotechnical guidelines and procedures for use by the City of San Jose for investigation and analysis of deep-seated landslides.
GREEN GULCH RANCH, Muir Beach, CA - Performed geotechnical and provided recommendations for the remediation of existing embankment dams in connection with proposed stream restoration.
MILL VALLEY COMMUNITY CENTER, Mill Valley, CA - Geotechnical investigation for two-story, pile-supported community center building and out-of-ground swimming pool on former landfill site. Project included settlement and stability analyses of proposed fills over soft Bay Mud deposits, development of site-specific earthquake response spectra and providing geotechnical design criteria for deep foundations.
FAIRFAX STREETS, Fairfax, CA - Geotechnical investigation and design recommendations for stabilizing numerous streets in connection with Measure K roadway improvements. Also performed investigation and construction observation during emergency repairs of Town Streets.
MILL VALLEY STREETS, Mill Valley, CA - Geotechnical reconnaissance and consultation for entire 50 miles of Mill Valley 's hillside streets. Geotechnical investigations for remediation of several roadway sites to correct landslide conditions.
NAPA VALLEY COLLEGE, Napa California - Geotechnical investigation, geologic hazards evaluation and construction observation for a new Vintners Teaching Winery building. Project included an evaluation of liquefaction induced settlements in accordance with updated California Division of Mines and Geology guidelines, and of developing recommendations for lime treatment of weak and expansive soils.
MARIN COUNTY CORRECTIONAL FACILITY, San Rafael, CA - Provided geotechnical services during construction of new jail building adjacent to existing Frank Lloyd Wright Civic Center . Project included monitoring of blasting, performing kinematic and stability analyses for extensive rock cutslopes, and providing recommendations for permanent tieback anchors to shore 35-foot high slopes adjacent to the Civic Center .
SANTA ROSA JUNIOR COLLEGE, Santa Rosa, CA - Geotechnical investigation and construction observation for a new Health Sciences Building . Project included an evaluation of liquefaction induced settlements in accordance with updated California Division of Mines and Geology guidelines, and of developing recommendations for foundation support on weak and expansive soils.
SKYWALKER RANCH, Lucas Valley, CA - Geotechnical investigations for construction of technical building, day care center and guest apartments with underground parking at George Lucas' large film production complex. Projects included stability evaluations, providing design recommendations for tiedback shoring in weak colluvial soils, and developing design criteria for conventional spread footings, drilled piers and driven piles.
KENT LAKE STREAM RELEASE REPLACEMENT, Kent Lake, CA - Performed geotechnical investigation for new siltation basin at the base of existing large dam. Project included stability analysis of deep cuts within old fill deposits, and recommendations for soil nail and braced shoring systems.
OAK SPRINGS WATER LINE REPLACEMENT, San Anselmo, CA - Performed geotechnical investigation and construction observation during replacement of water line damaged by landsliding. Project consisted of deepening water line below the zone of sliding and active creep.
GEORGE LUCAS PROPERTY, San Anselmo, CA - Geotechnical investigation for planned residential structure and court on steep hillside. Project involved design of numerous tiered reinforced earth walls ranging up to approximately 30 feet high, developing tiedback shoring recommendations for planned 40 foot cut in sheared and faulted Franciscan Melange, and providing geotechnical recommendations for roadway stabilization, extensive site grading, structural support of improvements and the construction of a bridge.
BENMORE VALLEY DAM, Lake County, CA - Performed seismic stability evaluation of existing earth dam including rapid drawdown analyses and liquefaction analyses, and provided conclusions and recommendations concerning construction or a downstream filter system to prevent piping erosion through the dam. Project included detailed site response evaluation and post-liquefaction seismic deformation analyses.
GOLDEN GATE BRIDGE - SOUTH TOWER, San Francisco, CA - Performed an evaluation of potential backfill materials suitable for placement between the existing bridge pier and surrounding coffer dam to absorb the impact of large super tankers.
REDWOOD LANDFILL EXPANSION, Novato, CA - Provided technical review services in connection with the proposed vertical expansion of the existing landfill facility. Performed static and dynamic stability and deformation analyses to evaluate the sequenced staged loading of 165 foot high refuse slopes to be placed over soft bay mud foundation.
TIBURON FIRE DEPARTMENT, Tiburon, CA - Performed settlement analyses of conventional and lightweight fill over soft bay mud and provided design alternatives to mitigate settlement impact on adjacent structures.
CORTE MADERA FIRE STATION # 13, Corte Madera, CA - Performed settlement and stability analyses, and developed mitigation measures to address seismic lurching of fill banks over soft bay mud.
SUTRO TOWER, San Francisco, CA, Performed geotechnical investigation and construction observation in connection with a new generator pad facilities at base of tower.
GEOTECHNICAL PEER REVIEW SERVICES, Larkspur, Mill Valley, Ross, Sausalito, San Anselmo, Novato, Marin County, CA - Provided review of geotechnical planning and building permit-level submittals to evaluate conformance with local ordinances and geotechnical standards of practice.
STAFFORD LANDSLIDE, Stafford, CA - Performed geotechnical investigation and provided design recommendations for the construction of a large debris deflection/catchment basin in connection with a massive debris flow landslide.