GMU Geotechnical

Over 50 Years of Engineering Excellence.

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      • Over 50 Years of Engineering Excellence
        949.888.6513
        23241 Arroyo Vista
        Rancho Santa Margarita
        CA 92688
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      • Over 50 Years of Engineering Excellence
        949.888.6513
        23241 Arroyo Vista
        Rancho Santa Margarita
        CA 92688
        • GMU Difference
        • History
        • Key Staff
        • Client List
        • Culture
        • Geotechnical Engineering & Engineering Geology
        • Pavement Engineering
        • Structural Engineering and Civil Engineering
        • Forensic Engineering and Expert Witness
        • Soils, Materials Testing and Inspection
        • Construction Management and Monitoring
        • News
        • Publications
        • Awards
        • Featured Projects
        • Drilled Displacement Columns at Emerald Bay
        • Contact
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  • In The News
      • Over 50 Years of Engineering Excellence
        949.888.6513
        23241 Arroyo Vista
        Rancho Santa Margarita
        CA 92688
        • GMU Difference
        • History
        • Key Staff
        • Client List
        • Culture
        • Geotechnical Engineering & Engineering Geology
        • Pavement Engineering
        • Structural Engineering and Civil Engineering
        • Forensic Engineering and Expert Witness
        • Soils, Materials Testing and Inspection
        • Construction Management and Monitoring
        • News
        • Publications
        • Awards
        • Featured Projects
        • Drilled Displacement Columns at Emerald Bay
        • Contact
        • Careers
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      • Over 50 Years of Engineering Excellence
        949.888.6513
        23241 Arroyo Vista
        Rancho Santa Margarita
        CA 92688
        • GMU Difference
        • History
        • Key Staff
        • Client List
        • Culture
        • Geotechnical Engineering & Engineering Geology
        • Pavement Engineering
        • Structural Engineering and Civil Engineering
        • Forensic Engineering and Expert Witness
        • Soils, Materials Testing and Inspection
        • Construction Management and Monitoring
        • News
        • Publications
        • Awards
        • Featured Projects
        • Drilled Displacement Columns at Emerald Bay
        • Contact
        • Careers

City of Irvine Public Works – Jeffrey Road Rehabilitation

September 15, 2014 by

GMU provided pavement engineering services, consisting of a pavement evaluation and materials report pertaining to the rehabilitation of Jeffrey Road from Walnut Avenue to Trabuco Road in the City of Irvine. Our engineering services included a visual pavement condition survey, in-place falling weight deflectometer (FWD) testing, asphalt coring and sampling, laboratory testing, and engineering analysis with a report. Since the subject pavement within the project limits exhibited some further degradation, GMU was subsequently requested to address rehabilitation changes due to further pavement degradation observed since our reference report was issued.

Westar Associates – Mercantile East and West Retail Centers

September 15, 2014 by

GMU provided geotechnical engineering and construction observation and testing services for the new construction of these two large retail centers, containing major parking lot areas, in Ladera Ranch. Conventional structural design for drive and parking bay asphalt pavement, along with concrete interlocking paver design were performed. Observation and testing of the subgrade, aggregate base, and asphalt concrete for the pavement was performed under the supervision of the County of Orange Grading Department.

La Paz Road Rehabilitation

September 15, 2014 by

GMU provided both pavement engineering along with construction observation and testing services for the La Paz Road Pavement Rehabilitation project, from Kings Road to Aliso Creek Road, located in the City of Laguna Niguel. Our engineering services included a visual pavement condition survey, in-place falling weight deflectometer (FWD) testing, asphalt coring and sampling, laboratory testing, and engineering analysis with a report. The construction of the project consisted of cold planning the existing pavement along gutter and median curb, grinding out and replacing variable width conventional 3/4–inch AC to a depth of 12-inches, placing variable depth conventional 3/8-inch AC leveling course, and placing a rubberized asphalt concrete 2-inch-thick overlay on the entire width of the subject portion of La Paz Road.

County of Orange Public Works – La Pata Gap Closure

September 15, 2014 by

GMU worked on the geotechnical investigation and design of the County’s La Pata Gap Closure project intermittently since the initial feasibility studies in 2003. GMU’s investigation and design services address large-scale landslides, complex slope stability analysis, extensive grading, deep fill settlement, bridge foundation design, and pavement design. Pavement engineering services involved asphalt coring and sampling, laboratory testing, and engineering analysis. The pavement design incorporated the use of warm mix asphalt, rubberized asphalt, and pavement interlayer mat for asphalt overlay.

Ocean Ranch at Bear Brand – 2012 and 2013 Street Rehabilitation Projects

September 15, 2014 by

GMU provided pavement engineering, construction observation and testing, and construction management services for these projects. Our engineering services included a visual pavement condition survey, in-place falling weight deflectometer (FWD) testing, asphalt coring and sampling, laboratory testing, and engineering analysis with a report. The numerous private street areas (13) involved in the subject pavement rehabilitation projects utilized both deep lift AC repair and full depth reclamation (FDR) methods for the repair of the distress existing in portions of the street areas. The FDR procedure consisted of 1) cold milling the subject street areas a minimum of 3 inches, 2) pulverization of the remaining AC into the upper 15 inches of the subgrade soil materials, mixing in Portland cement and moisture conditioning subgrade, and compacting, 3), curing of FDR base layer, 4) micro-cracking of FDR base layer, and 5) placement of AC materials.

Related Services

  • Geotechnical Engineering & Engineering Geology
  • Pavement Engineering
  • Structural Engineering and Civil Engineering
  • Forensic Engineering and Expert Witness
  • Soils, Materials Testing and Inspection
  • Construction Management and Monitoring
  • Additional Services
  • Stormwater QSP
  • Geotechnical Instrumentation
  • Construction Vibration/ Blast Consulting
  • Laboratory Testing
  • Special Inspection
  • Grading Support

General Contact

GMU Geotechnical, Inc.
23241 Arroyo Vista
Rancho Santa Margarita, CA 92688
P:949.888.6513
F:949.888.1380

People Contacts

Principals
Greg Silver | M.S., PE, GE
President/Principal Engineer
949.633.0617

Gary Urban | PE, GE
CEO/Principal Engineer
949.633.0613

Mike Moscrop | M.S., PE, GE
Vice President/Principal Engineer
949.463.4296

Aron Taylor | M.S., PG, CEG
Vice President/Principal Geologist
949.510.7503

Directors
Bob Mutchnick
Director of Engineering Seismological Services
949.289.6817


Ali Bastani
Director of Geotechnical Engineering
949.232.8984


Roger Schlierkamp
Director of Pavement Engineering
949.300.2158


Dave Atkinson
Director of Commercial Development
949.633.0618

Senior Staff
Lisa Bates
Associate Engineering Geologist
714.329.3746


Dave Hansen
Senior Geotechnical Engineer
949.433.8850


Katie Farrington
Project Geologist
949.235.6723


Ryan Douglas
Staff Engineer
949.394.5641


Matt Farrington
Staff Engineer
951.551.1556


Rob Howell
Staff Engineer
949.289.3158


Jessy Meza
Design Engineer/CAD
626.614.4063


John Villarraga
Laboratory Manager
Norm Biehn
Special Inspection Manager/Senior Special Inspector
951.741.2937


Administration
Jenni Neff
Office Manager

Marianne Brown
Accounting Manager

Cynthia Balo
Human Resource Manager

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23241 Arroyo Vista | Rancho Santa Margarita CA 92688 | USA | 949.888.6513