Geotechnical and Trenchless Engineering     











Compaction grouting used to densify liquefiable sands adjoining Grayson Creek in Pleasant Hill, California.




© 2012 DCM Consulting, Inc.

Client Base



Since 1984, Dave Mathy has provided geotechnical and trenchless engineering services to the following valued clients:

Public Sector Clients - Owners:
  • Alameda County Water District
  • Castro Valley Sanitary District
  • Central Contra Costa Sanitary District
  • City of Antioch
  • City of Brentwood
  • City of Brisbane
  • City of Burlingame
  • City of Healdsburg
  • City of Livermore
  • City of Monterey
  • City of Oakley
  • City of Palo Alto
  • City of Petaluma
  • City of Pleasanton
  • City of Redding
  • City of Rohnert Park
  • City of San Leandro
  • City of San Mateo
  • City of South San Francisco
  • Contra Costa Water District
  • County of Alameda
  • County of Solano
  • Delta Diablo Sanitary District
  • Dublin San Ramon Services District
  • EBMUD
  • Fairfield-Suisun Sanitary District
  • Iron House Sanitary District
  • Livermore Amador Valley Water Management Authority
  • Livermore Area Recreation and Park District
  • Marina Coast Water District
  • Napa Sanitation District
  • North Marin Water District
  • Oro Loma Sanitary District
  • Sanitary District No. 1 of Marin County
  • Santa Cruz County Sanitation District
  • Sonoma County Water Agency
  • South Bayside System Authority
  • Union Sanitary District
  • Vallejo Sanitation and Flood Control District
  • West Valley Sanitation District
Public Sector Clients - Design Firms:
  • Brown & Caldwell
  • Carollo Engineers
  • CDM
  • Covello Group
  • GHD
  • Harris Associates
  • HDR Engineering
  • Kimley-Horn
  • Montgomery Watson Harza
  • Parsons Engineering Science
  • Psomas
  • RBF Consultants
  • RMC Water and Environment
  • Sverdrup Civil
  • Tetra Tech
  • V & A Engineers
  • Water Works Engineers
  • West Yost & Associates
  • Whitley, Burchett & Associates
  • Winzler & Kelly (GHD)
Private Sector Clients:
  • Cardoza Properties
  • De La Salle Institute
  • Kelly-Moore Paint Co.
  • Level (3)
  • Metromedia Fiber Network
  • Northview Pacific Laboratories
  • Oliver and Company
  • Stanford Restaurants
  • SPI Management
  • University of the Pacific