Services
Geotechnical Reports and Evaluations
Alta prepares all types of geotechnical reports and evaluations including due diligences, preliminary geotechnical investigations, Alquist-Priolo fault investigations, and grading plan reviews. Topics typically included in these reports are site descriptions, geologic conditions, seismic evaluations, engineering characteristics, geotechnical recommendations, foundation design recommendations, and slope stability evaluations. These reports are suitable for use in cost estimates, bid documents, and submittal to governing agencies.
Site Investigations
Our principals and staff are highly experienced in performing site investigations in various geologic conditions. Equipment regularly utilized during our subsurface investigations include hollow-stem, bucket auger, air-track, CPT, and flight auger drill rigs, backhoes, excavators, and seismic refraction surveys. Specialized investigations that can be performed by Alta include fault investigations, and liquefaction, rippability, and slope evaluations.
Foundation Design Recommendations
Alta’s staff works with the project structural engineer to develop cost effective foundation designs. Recommendations are prepared in accordance with the current building codes based on the onsite geotechnical conditions.
Pavement Design Recommendations
Pavement design recommendations are prepared in accordance with Caltrans and local governing agency requirements.
Observation and Testing of Grading
Alta employs highly experienced technicians to observe and test mass grading operations. Our project managers and principals take an active part in grading operations and are available for onsite consultations. Both our offices are fully equipped to handle mass grading operations.
Laboratory Testing
Our laboratory in Corona is equipped to support Alta’s site investigations and field operations.
Observation and Testing of Onsite Construction
Our technicians are also experienced in observing onsite construction operations, including utility trench and retaining wall backfill, street and sidewalk construction, footing excavation inspections, and subgrade pre-saturation.
Concrete "Special Deputy Inspection" and Testing
Alta employs field technicians that possess ICC "Special Deputy Inspection" certifications for concrete, reinforced concrete, structural masonry and pre-stressed concrete.