Subdivisions
Subdivisions
Hillcrest Heights - El Sobrante, CA
Geotechnical Investigation (1995)
Construction Observation and Testing Services (1996-1999)
Slope Movement Monitoring (2001-2003)
A 65-unit subdivision was proposed in a section of the East Bay hills known to contain landslides. AKA studies revealed three major landslide complexes crossing the site and deep remedial grading services were recommended to stabilize this area. Monitoring of the complex grading during construction was performed to provide stable street and building pad areas for future development. In some locations, fill depths reached approximately 50 feet. A tie-back shoring wall was installed and monitored during construction along the upslope boundary of the new subdivision to minimize movement into the site from a non-repaired landslide existing under apartment buildings on the uphill property.
Old Blackhawk Road Subdivision - Danville, CA
Geotechnical Investigation (2007)
Construction Observation and Testing Services (2007-present)
AKA recently completed a geotechnical investigation of the site of a new six-lot custom home subdivision in Danville, California. The subdivision developer is the well known luxury custom home builder, Mark Becker Homes. The project involves home sites adjacent to and on both sides of Sycamore Creek. Construction of a new bridge crossing along with access roads and utility infrastructure are a part of this project. Geotechnical challenges associated with the site include potential for liquefaction of the relatively young creek sediments, as well as creek bank stability issues. The bridge was installed in the fall of 2007 and the remaining infrastructure and homes are scheduled for construction in summer of 2008.
Montebello Terrace - Oakland, CA
Geotechnical Investigation
Construction Observation and Testing Services (1999)
An early 1900s iron pyrite mine area was to be reclaimed for a major housing project. Grading began but financial difficulties stopped the project. Several years later, AKA was asked to re-evaluate the site, including locations of past mine activity as well as previous grading, to develop recommendations for new city streets and 70 detached individual houses. Recommendations for both building foundations and numerous retaining walls to contain the cut and fill slopes on the site were developed. The rock cuts at the site were monitored for long-term stability. Monitoring was performed during construction. One lot was subsequently deleted from consideration for construction when an adit to the mineshaft was discovered and sealed.
