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GeoConSol
Geotechnical & Tunnel Consultants

A consultant is a universal observer who can look at a problem outside the environment in which the problem came to be, thereby creating a solution that was never possible before.  Fernando Flores

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EXPERT / FORENSIC SERVICES
DIFFERING SITE CONDITIONS
-->DSC Technical Principles
-->DSC Standards for Entitlement
-->DSC Independent Review
-->DSC Case Histories
-->Case History of a Bogus Expert
GEOTECHNICAL / CONSTRUCTION
-->Rock Testing/Boreability
-->Impact Hammer Feasibility
ARTICLES / PUBLICATIONS
TUNNELS / TUNNELING
-->Tunnel Boring
-->Excavation Improvement
-->Microtunneling/Pipe-Jacking
-->Selection of TBMs & MTBMs
-->Forensic Investigations
-->Safety
-->Detection of Covert Tunnels
CLIENTS
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Peter J. Tarkoy
geoconsol, testimonials
  • Testimonials

  • "Dr. Peter Tarkoy is an excellent geological/tunnel consultant. Results are the true test of one's ability to perform. Dr. Tarkoy has provided years of excellent results for his clients. I endorse and highly recommend Dr. Tarkoy.  Great Results, Expert, High Integrity" (KK-Contractor)
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  • "Peter is an excellent forensic geologist and engineer that knows not only the technical matter needed for geotechnical and tunnel engineering, but he is a great problem solver that knows how to extract the pertinent information and focus on the key issues efficiently." (MB-Engineer) 
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  • " Based upon my experience in this field and comparing Dr. Tarkoy's work with that of other experts in the same field, I highly respect Dr. Tarkoy. I worked with Dr. Tarkoy for approximately 3 years. During that time period, Dr. Tarkoy consistently demonstrated an extensive knowledge of the construction process, particularly microtunneling work, as well as a thorough understanding of the claims and litigation process. I found him to be extremely responsive, motivated, and able to meet all deadlines and requirements. From the outset and continuing until the matter was resolved, he consistently provided a thorough objective assessment of the owner's and contractor's positions and the opinions that he expressed (and supported) were based upon his assessment. His role and assistance were critical and ultimately proved to be essential to a successful resolution of the case.  For these reasons, I highly recommend Dr. Tarkoy."  (Attorney for the owner)

  • I had hired Dr. Tarkoy as a tunnel expert to help us in the development of an innovative underground project. Peter provided a wealth of insight, experience, and energy to your efforts. Peter also made introductions to vendors and other experts to extend our understanding of our undertaking. Peter is an outstanding geologic and tunnelling expert. He was adaptive, open-minded, and very constructive. We found his business practice to be of the highest integrity and highly reliable. ( GM)
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  • "You have managed to condense many years of hard experience....... and to present the information in an even-handed manner.  Both contractors and owners can benefit..........." (Attorney / Arbitrator)
  • "Peter is a highly intelligent fellow who sees clearly complex issues concerning geology and the mechanics of tunneling. A sophisticated analyst and eventual forensic expert who can bring the light on the difficulties and contingencies of the tunneling business to achieve balanced and equitable conclusions. One of a kind." (GT-Supplier)

    "Peter, It is not important if we win or lose the case.  The most important is to have known a man at this time 'honest'.  Thanks for all."
    (MTF-Contractor)

  • "I have commissioned Peter Tarkoy on numerous occasions to write geotechnical articles for World Tunnelling, a global publication sent to professionals in over 80 countries worldwide. His writing is usually precise, concise and authoritative, displaying the hallmarks of someone with many years' experience and at the top of their profession. His work has been a great bonus to the magazine and it is hoped we will be able to feature more of his work." (GD-Editor)

    "Peter Tarkoy is probably the single most important part of any project potentially or currently having problems in underground construction. The 20+ years I have known Peter he has shown a keen insight for getting to the core issues and presenting them in an un-refutable "forensic" style only rivaled by Perry Mason. I give Dr. Tarkoy my highest recomendation."
    (TC-Supplier of everything Microtunneling)

    "I have known Peter Tarkoy for around 15 years , first he acted as an expert witness for me and from there we developed a professional and personnel relationship. On many occasions Peter has provided advice on tunneling issues relating to claims. Peter has worked for both contractors and owners and at all times maintains a high level of integrity and honesty in the work acting professionally at all times. I have no hesitation in recommending Peter for work in underground construction." (PN-Microtunneling & Tunneling Expert)


  • "I have known Peter for over 20 years. He is a tireless professional in the tunneling market. His geotechnical skills are amazing. His data in addressing a tunneling issue is so factual there is no doubt in what he provides. Peter is well-regarded around the world in the tunneling industry. He has spoken at many industry conferences and his work is frequently published. He has strong opinions backed by accurate facts."
    (BK-Equipment Supplier & Publisher)


    "Informative and helpful in the presentation and analysis of differing site condition claims.  Recommended for all construction people." 
    (FR-Owner)

  • "We just got the decision on the arbitration for the ___________ job.  We were awarded $1.2 million.  We are very pleased with the final verdict.  Obviously they lost on all counts.  This is encouraging.  We got our money last Friday Peter.  What an ordeal. Thanks for your help." (MWBRB-Contractor)

    "Your report 'looks good and very factual and professional , especially compared to ....................'
    (ASNRC-Contractor)
  • "As the employee of an owner, I found new insights into the claims process, and especially appreciated your description of the techniques for evaluating changed conditions claims.  Your graphical presentations are very helpful and convincing."  (RET-Owner)

  • "Although we are extremely pleased with .... the contents.... and the services provided.... (we) would prefer to remain an anonymous fan."  (DC-Attorney for the Owner)

  • "Informative and helpful in the presentation and analysis of differing site condition claims.  Recommended for all construction people."  (FR-Owner)


  • "Dr. Tarkoy, Thank you once again for your invaluable assistance regarding the differing site condition on our dredging project. After receipt of your analysis, the owner's intransigence quickly gave way to a full and complete satisfaction of that aspect of our claim. Your inter-disciplinary expertise has the added benefit of reducing claim costs while still providing the same level of professionalism." (KM-Attorney)

  • "....will do a lot towards reducing the number of disputes, arising from differing site condition claims.  A thorough understanding by both sides of Dr. Tarkoy's six commandments, while not necessarily effect the number of differing site condition claims, will certainly result in better understanding of the claims and promote expeditious and equitable settlement of same."  (PMS-Contractor)

  • "We were properly impressed with his economical and incisive presentation, and with his 3-D colored graphics which interpreted data at a glance and carried tremendous visual impact."  (HTY-Contractor)

    "As the lead attorney for a municipality defending against multimillion dollar differing site condition claims, I retained Dr. Tarkoy as an expert for consultation and testimonial purposes. The dispute involved a project that entailed the installation of several miles of interceptor sewer at a depth of approximately 40 feet and for pipe sizes of 24" to 48" (ID). Dr. Tarkoy was retained to provide consulting and litigation services including testimony and the preparation of an expert report."
    (GET-Attorney for Owner)

  • "I have known Peter for over 20 years. He is a tireless professional in the tunneling market. His geotechnical skills are amazing. His data in addressing a tunneling issue is so factual there is no doubt in what he provides. Peter is well-regarded around the world in the tunneling industry. He has spoken at many industry conferences and his work is frequently published. He has strong opinions backed by accurate facts." (BK-Executive)

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