4280 Redwood Hwy, Suite 10 San Rafael, CA 94903 (415)472-4244


MDA  has been qualified as an A class engineering contractor since 1990. Our extensive experience in all types of hillside construction methods allows our team to provide the most cost effective approach to the construction of your project. We have all the heavy equipment required to perform construction of hillside foundations including drilled pier and grade beam systems. We also have expertise in single side access shot-crete systems which save time and money. We specialize in landslide dewatering and repair. We provide a wide range of services including:
  • Site work and drainage

  • Tight access excavation

  • Hillside stabilization and repair

  • Portable drilling

  • Demolition

  • Marine construction

  • Horizontal tie-backs

  • Foundations

  • Rock anchors

  • Retaining Walls

  • Track-rig drilling

  • Seismic retrofit

  • Architectural concrete