Douglas Rudenko, P.G.

Vice President & Northeast Regional Manager

Doug has worked for 29 years in the field of engineering seismology, specializing in the analysis of seismic effects from blasting, pile driving, dynamic compaction, seismic operations, traffic, and industrial vibrations. He has observed, recorded, and analyzed the effects of vibrations on various types of structures throughout the United States and abroad. Doug also completed many damage claim investigations regarding alleged damage to commercial and residential structures from various vibration sources as well as alleged damage to residential wells and aquifers resulting from blasting. He has provided expert testimony for environmental hearing boards, zoning boards, state and local regulatory agencies and various courts in the fields of blasting, geophysics, geology, and seismology with particular emphasis on blasting, and vibration standards, the effects of vibration on structures and construction materials, and the effects of vibration on commercial and domestic water supplies.

Doug has also been invited by MSHA, ISEE, Fire Marshalls Association, NSSGA, and commercial explosive companies to lecture blasters, engineers, and regulators on fundamental seismology, proper field practices for seismograph use, the effects of ground vibration and air overpressure on structures, and vibration control through blast design. He is also a member of the International Society of Explosive Engineers – Standards Committee. One of the tasks of this committee is to develop and update uniform and technically appropriate standards for blasting seismographs.

Some examples of hallmark projects that Mr. Rudenko has managed include:

  • Determining appropriate vibration criteria for frescos in the U.S. Capitol building utilizing ultra-sonic measurements and frequency response function techniques
  • Developing vibration criteria and implementing a monitoring plan for the historic lobby in the Alfred E. Smith Building such that demolition activity that included jack hammering of the upper floors in the structure could safely be completed
  • Developing vibration criteria and implementing a monitoring plan for the historic Davidson County Courthouse in Nashville, TN such that blasting activity for an underground parking garage located within 60 feet of the structure could safely be completed


B.S. – Geophysics, Pennsylvania State University, 1984

Continuing Education:

  • Short Course in Shallow Seismic Reflection Methods, EG & G Geometrics, Sunnyvale, CA; (June 1988)
  • Short Course in Ground Penetrating Radar, SoftEarth Associates, Inc., Downers Grove, IL; (September, 1990)
  • Research Workshop – Geophysical Characteristics of Contaminants in the Subsurface, Society of Exploration Geophysicists Annual Meeting, Houston, TX; (November, 1991)
  • Short Course – Introduction to Engineering & Environmental Geophysics, Bell West Geoservices, Inc., Hazleton, PA; (July, 1992)
  • Short Course – Controlled Blasting for Rock Slopes, Blast Dynamics, Inc. Reno, NV; (October, 1999)
  • Certification Program – Practical Blasting Fundamentals, International Society of Explosive Engineers, Allentown, PA; (April, 2000)
  • Short Course – Geotechnical Instrumentation for Field Measurements, University of Florida, Cocoa Beach, FL; (March, 2001)
  • Short Course – Air Quality Dispersion Modeling, NSSGA Environmental Health & Safety Forum, Phoenix, AZ (September, 2003)
  • Short Course – Structural Vibration Analysis, ASCE, St. Louis, MO; (October, 2004)
  • Applied Mechanics: Statics & Strength of Materials, Penn State University; (April – May, 2006)
  • Geotechnical Instrumentation and Monitoring Bootcamp, ASCE, Cincinnati, OH; (Feb., 2010)
  • Structural Condition Assessment of Existing Structures, ASCE, Orlando, FL (Feb., 2011)
  • 5th Soil Dynamics Short Course, Missouri University of Science & Technology, Wheeling, IL (Apr., 2013)

Professional Registration:

  • Certified Professional Geologist, American Institute of Professional Geologist, CPG-8690
  • Registered Geologist, Commonwealth of Pennsylvania, PG-730-G
  • Registered Geologist, Commonwealth of Kentucky, PG-856
  • Registered Geologist, State of Missouri, RG-0540
  • Registered Geologist, State of Illinois, 196-000198
  • Registered Geoscientist, State of Texas, 3744
  • Licensed Blaster, Commonwealth of Pennsylvania, BL-0338
  • OSHA 29 CFR 1910.120, 40 Hr. Hazardous Waste Training

Professional Memberships:

  • American Institute of Professional Geologists
  • American Society of Civil Engineers
  • Society of Exploration Geophysicists (Member of the Executive Committee, Engineering and Groundwater 1988-1992; Member of the Near-Surface Geophysical Committee, 1993-2004)
  • Environmental and Engineering Geophysical Society (Founding Member)
  • Pennsylvania Council of Professional Geologists
  • International Society of Explosive Engineers (Member of the Blast Vibration and Seismograph Section; Member of the Standards Committee)
  • Association of Engineering Geologists
  • National Fire Protection Association (Member of the Technical Committee on Explosives)
  • Society of Mining Engineers

Professional Experience:

Doug is currently Vice President & Northeast Regional Manager for Vibra-Tech Engineers, Inc. He is responsible for the direction and supervision of Vibra-Tech’s professional staff in six offices located in the Northeastern United States.

Doug is also a Senior Geophysicist and Manager of the Technical Services Group at the corporate headquarters of Vibra-Tech Engineers, Inc. in Hazleton, Pennsylvania. As manager of this group, Doug directly oversees four full-time employees. His responsibilities include the management and planning of all geophysical investigations, including budgetary monitoring and major technical decisions, scheduling, and staff management. He is also responsible for reviewing technical calculations, drawings, figures, maps, and draft and final reports.

Doug has used a wide variety of geophysical techniques on various environmental and geotechnical projects throughout the Northeast. Projects he has managed include the use of geophysical techniques in dam site investigations; foundation studies for power plant facilities; subsurface investigations for highway and utility alignments; geophysical and geological investigations for mining, quarrying, and dredging operations; investigations of subsurface conditions related to new and existing landfill facilities; delineation of contamination plumes; detection of buried waste; and the use of geophysical techniques in mine subsidence, sinkhole, and tunnel investigations.

Doug is also responsible for the development and planning of all Iso-Seismic and Vibra-Map surveys performed by Vibra-Tech. The Iso-Seismic system is an array of 170 digital seismometers deployed around a quarry site to measure blast vibrations. The data is used to pinpoint chronic vibration areas around the quarry that may be related to the geology. Vibra-Map calculations are then employed to determine the proper firing time to use for a production blast in order to produce a vibration signal that minimizes structural response. Doug oversees the planning of these surveys, budgetary monitoring, scheduling and staff management, and review of final reports.

Other projects Doug has been responsible for include the development of a recording system, procedures, and analysis for several environmental impact studies involving the measurement and prediction of traffic vibrations on structures adjacent to proposed highway alignments.

Doug has also been involved in two different research projects sponsored by the U.S. Bureau of Mines. In 1985 he assisted with the collection and reduction of geophysical data for a mining research contract entitled “Geologic Factors Affecting Vibration from Surface Mine Blasting.” The aim of this study was to determine the effect of local geology on ground vibration and test methods of choosing the proper delay interval such that blast vibrations would destructively interfere.

In 1987, Doug was responsible for the acquisition and reduction of all geophysical data collected for a three-year research contract entitled “Design and Implementation of a Monitoring System to Detect Imminent Subsidence in the Anthracite Region of North Eastern Pennsylvania.” The goal of this study was to develop a geophysical method that could assess the condition of the subsurface prior to a subsidence event and use this relationship to understand the reaction of the subsurface preceding the subsidence. Seismic techniques were judged to be the most insensitive due to the urban nature of the sites and most closely related to the physical and material properties of the subsurface.


  • “Monitoring and Advanced Evaluation Techniques for Aggregate Mining in Urban Settings” with Jeffery Straw, Proceedings of the 2011 Society of Mining Engineers Annual Meeting, Denver, CO (2011).
  • “Particulate Matter as an Air Pollutant, Past, Present, and Future” with Jonathan Ferdinand, Proceedings of the 5th Biennial Blasting Vibration Technology Conference, Key West, FL (2004).
  • “The Court of Public Opinion: Winning Through Science” with Philip Berger, Jr., AggMan, Pages 47-49, February 2002.
  • “Blasting Near Domestic Water Supplies – Facts and Myths”, Proceedings of the 4th Biennial Blasting Vibration Technology Conference, Key West, FL (2002).
  • “Airblast – An Often Overlooked Cause of Structural Response”, Proceedings of the 10th Hi-Tech Seminar on Blasting Technology, Instrumentation and Explosives Applications, Nashville, TN (2001).
  • “Diagnosing and Solving Blasting Problems”, Aggregates Manager, Pages 25-30, July 2000.
  • “An Analytical Approach for Diagnosing and Solving Blasting Complaints” Proceedings of the 9th Hi-Tech Seminar on Blasting Technology, Instrumentation and Explosives Applications, Orlando, FL (2001).
  • “Structural Response – The Primary Cause of Blasting Complaints”, Proceedings of the 3rd Biennial Blasting Vibration Technology Conference, Key West, FL (2000).
  • “Understanding Blast Vibrations – A Key to Gaining Control”, Proceedings of the 2nd Annual Blasting Vibration Technology Conference, Key West, FL (1998).
  • “Blast Vibrations – Planning for the Future”, Proceedings of the 2nd Annual Blasting Vibration Technology Conference, Key West, FL (1998).
  • “Engineering Geophysics for the Mining and Construction Industries”, Proceedings of 8th Hi-Tech Seminar on Blasting Technology, Instrumentation and Explosives Applications, Nashville, TN (1998).
  • “Optimizing Seismic Characterization of Longwall Coal Mine Overburden Using CAD and Computer-Enhanced Techniques: Case Study from Longwall Mining Operations, Western Maryland, USA” with K. Kluger Cohen and M.A. Trevits, Proceedings from the Third Canadian Conference on Computer Applications in the Mineral Industry, Montreal, Canada (1995).
  • “Concepts of Seismic Refraction Processing”, Special Compilation for Bobby Timmons used in ”Prospecting for Natural Aggregates: An Update; Rock Products, Pages 32-33, January, 1995.
  • “Seismic Refraction Technique Applied to Highway Design in a Strip Mined Area of Southwestern Pennsylvania” with W.M. Lorence, H.D. Ackermann, Proceedings of the 42nd Annual Highway Geology Symposium, Albany, NY (1991).
  • “P-wave and S-wave Velocity Measurements Related to Subsidence Over a Longwall Mine” with J.S. Walker, A.M. Richardson, H.D. Ackermann, and J.W. Reil, Proceedings of the 59th Annual Meeting of the Society of Exploration Geophysicists, Dallas, TX (1989).
  • “Use of Geophysical Methods in a Geotechnical Investigation” with K.H. Early, Proceedings of the 2nd International Conference on Case Histories in Geotechnical Engineering, St. Louis, MO (1988).