Thunder Mountain Enterprises, Inc. is a unique professional organization offering expertise in soil & water management. Thunder Mountain principals have almost 40 years general engineering construction experience, with 20 years of focus on environmentally sensitive projects. TME is the only California company to integrate a wide range of field construction services with consulting and design under the same roof. Our customers include public agencies & private industry. 


Dave Smiley, president of TMEDave Smiley, CPESC, CPSWQ

Dave Smiley became a licensed general engineering contractor in 1974, and accumulated additional licenses and technical certifications while RME for Phillips 66 Field Services during the 1980’s. Dave became well known in the US for his expertise in geosynthetics employed in general engineering, environmental, and paving applications during the 1980’s and 1990’s. Dave served on the board of Cal APA (California Asphalt Paving Association) for over a decade, and was president of the AIA (Asphalt Interlayer Association) for 5 years. In 1990 Dave was elected to serve on the board of ECTC (Erosion Control Technology Council), then in 1992 was certified as CPESC #808 (Certified Professional in Erosion & Sediment Control), and later earned the CPSWQ (Certified Professional in Storm Water Quality).

In 1999, while Executive Vice President & General Manager of Reed & Graham, Inc. Dave, with his partner Aldo Branch launched Thunder Mountain with the vision of providing industry expertise and field technical services to support Reed & Graham’s line of environmental and engineered products.

Beth Smiley, CPESC, CPSWQ, QSP & QSD #50, Trainer of Record

Beth Smiley was asked to join Thunder Mountain in 2000 to grow the Storm Water business, and has done just that. Beth is well known in the construction industry as a top flight consultant and teacher. She is highly respected among regulatory communities as well, including SWRCB, RWQCB, Department of Fish & Game, COE, and USACE. As Director of Storm Water Services Beth leads Thunder Mountain’s Storm Water Consulting and Design activities and frequently teaches classes for QSP, QSD and QISP, as a Trainer of Record for both Construction & Industrial under the California Storm Water Permit for the last 18 years. Beth is a familiar face on Northern California’s high profile projects such as 5th Street Bridge Yuba City, Folsom Dam, Hazel Ave Bridge, and Sacramento International Airport.

Licenses, Certifications, Services at Thunder Mountain

  • Class A – General Engineering
  • C-32 Highway & Parking Improvement
  • C-27 Landscape Construction
  • QAL – Qualified Applicator’s License
  • Small Business Certified #30493
  • HAZ – Hazardous Substances Removal
  • CPESC – Certified Professional in Erosion & Sediment Control
  • CPSWQ – Certified Professional in Storm Water Quality
  • QSD – Qualified SWPPP Developer
  • QSP – Qualified SWPPP Practicioner
  • CASQA Qualified Trainer of Record
  • 24 hr Caltrans Certified SWPPP
  • Biologist
  • NICET Level 3 Laboratory Technician
  • Geotechnical Engineer (PE)
  • Licensed Surveyor