Receiving the microtunnel boring machine on line and grade after boring 440 feet through Bay Mud in Martinez, California.
Close-up of the face of a microtunnel boring machine.
Slurry separation plant used to process the spoils from a microtunnel pipe jacking project.
Jet grouting along a set of railroad tracks in support of a MTBM project in Martinez, California.
Fusion of the bursting head to a 21-inch diameter pipeline in Santa Cruz, California.
Preparing a maxi-HDD drill rig for a river crossing project in Santa Clara, California.
Installing fiber optic conduits in front of the convention center in Santa Clara, California.
© 2012 DCM Consulting, Inc.
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Technical Publications
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Dave has authored or co-authored over 20 technical papers which have been published in academic journals and presented at various engineering conferences within the United States and abroad.
A list of these papers is presented below. If you would like to receive a copy of any of these papers, please contact DCM Consulting, Inc.
Microtunneling
Guided Boring and the Lafayette/Pleasant Hill Road Trunk Sewer |
By: |
D. Mathy, R. Lanzafame, W. Adams and S. Gallyer
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Presented at: |
NASTT 2012, North American No-Dig Conference and Exhibition, Nashville, Tennessee
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Managing Geotechnical Risks on Trenchless Projects |
By: |
D. Mathy and M. Gelinas
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Presented at: |
NASTT 2010, North American No-Dig Conference and Exhibition, Chicago, Illinois
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Differing Site Condition Claims and Trenchless Projects |
By: |
D. Mathy and M. Gelinas
Joseph Covello (The Covello Group)
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Presented at: |
NASTT 2008, North American No-Dig Conference and Exhibition, Dallas, Texas
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Microtunneling Beneath the Napa River |
By: |
R. Kahl and D. Mathy
Tim Healy (Napa Sanitation District)
Ted Whiton (Winzler & Kelly)
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Presented at: |
NASTT 2007, North American No-Dig Conference and Exhibition, San Diego, California
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Microtunneling Construction Challenges on the Alvarado Boulevard Trunk Sewer Project |
By: |
D. Mathy
R. Arbolante (Union Sanitary District)
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Presented at: |
NASTT 2005, North American No-Dig Conference & Exhibition, Orlando, Florida
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Microtunneling in Challenging Soil Conditions: The Alvarado Boulevard Trunk Sewer Project |
By: |
K. Calderwood, J. Gill and D. Mathy
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Presented at: |
NASTT 2004, North American No-Dig Conference & Exhibition, New Orleans, Louisiana
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TBM vs. MTBM: Geotechnical Considerations |
By: |
D. Mathy and R. Kahl |
Presented at: |
ASCE 2003, International Conference on Pipeline Engineering and Construction, Baltimore, Maryland
NASTT 2003, International No-Dig Conference and Exhibition, Las Vegas, Nevada
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Engineering Inspection of Microtunnel Pipe Jacking |
By: |
D. Mathy |
Presented at: |
NASTT 2001, North American No-Dig Conference and Exhibition, Nashville, Tennessee
CWEA 2000, Sacramento, California
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Geologic Research and Reconnaissance: Stepping Stones through Stumbling Blocks in Trenchless Projects |
By: |
D. Nielson, D. Mathy and M. Gelinas
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Presented at: |
2000 Annual Meeting of the Association of Engineering Geologists and the Groundwater Resources Association, Santa Clara, California.
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Martinez East Side Trunk Sewer Microtunneling Through Bay Mud Directional Drilling Through Bedrock |
By: |
D. Mathy and D. Nielson
Kent VonAspern (Central Contra Costa Sanitary District)
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Presented at: |
1999 Rapid Excavation and Tunneling Conference, Orlando, California
P.U.G. 2000, Berkeley, California
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Geotechnical Engineering Aspects of Microtunneling in Soft Ground |
By: |
D. Mathy, R. Kahl, and D. Nielson |
Presented at: |
Geo-Institute Conference 1999
Geo-Engineering for Underground Facilities
University of Illinois at Urbana-Champaign
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Geologic Reconnaissance: The First Step in Successful Trenchless Construction |
By: |
D. Mathy and D. Nielson |
Presented at: |
NASTT 1999, North American No-Dig Conference and Exhibition, Orlando, Florida
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A Tale of Two Tunnels |
By: |
T. Pilecki (Central Contra Costa Sanitary District)
K. VonAspern (Central Contra Costa Sanitary District)
D. Mathy
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Presented at: |
NASTT 1999, North American No-Dig Conference and Exhibition, Orlando, Florida
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South Orinda Sewer Improvements, The Unbuildable Project |
By: |
T. Pilecki (Central Contra Costa Sanitary District)
M. Penny (Central Contra Costa Sanitary District)
D. Mathy
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Presented at: |
P.U.G. 1999, Oakland, California
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The Influence of Geologic Setting on Microtunneling |
By: |
D. Mathy and D. Nielson |
Presented at: |
ASCE 1998, Pipelines in the Constructed Environment, San Diego, California
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Recipe for Successful Microtunneling |
By: |
J. Goodwin (Brown and Caldwell) J. Gill (Union Sanitary District) D. Mathy |
Presented at: |
CWEA 1998, Oakland, California
ASCE 1998, San Diego, California
P.U.G. 1998, Berkeley, California
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Planning and Design Considerations for Microtunneling |
By: |
D. Mathy T. Pilecki (Central Contra Costa Sanitary District) |
Presented at: |
NASTT 1997, North American No-Dig Conference and Exhibition, Seattle, Washington
P.U.G. 1997, Oakland, California
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EPBM (Earth Pressure Boring Machine) Tunneling
Tunneling the A-Line |
By: |
D. Nielson, D. Mathy, T. Kalkman and D. Bennett
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Presented at: |
NASTT 2009, International No-Dig Conference & Exhibition, Toronto, Canada
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Horizontal Directional Drilling
Designing and Interpreting Geotechnical Investigations for Horizontal Directional Drilling |
By: |
M. Gelinas and D. Mathy
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Presented at: |
ASCE 2004, International Conference on Pipeline Engineering and Construction, San Diego, California
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Horizontal Directional Drilling: Lessons Learned in Telecommunications Conduit Installations |
By: |
M. Gelinas and D. Mathy
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Presented at: |
U.I.R. 2001, International Conference on Underground Infrastructure Research, Kitchner, Ontario, Canada
NASTT 2001, North American No-Dig Conference and Exhibition, Nashville, Tennessee
P.U.G. 2001, Berkeley, California
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Wastewater Treatment Facilities
Design and Construction of the Ryder Street Storage Basin |
By: |
M. Gelinas and D. Mathy
M. Larson and R. Hoffman (Carollo Engineers)
R. Ohlemutz and R. Matheson (Vallejo Sanitary and Flood Control District)
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Presented at: |
P.U.G. 2007, Berkeley, California
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