John Booth, the Principal Consultant and Practice Director of Sylvanus Arboricultural Consultants Ltd., is a Chartered Aboricuturalist and Chartered Environmentalist and one of the UK’s most widely qualified Arboricultural Consultants. He has over 25 years experience in both the private and public sectors and has written numerous articles and papers for respected publications including the International Journal of Urban Forestry for which he is also a referee.
Mr. Booth and Sylvanus Ltd. are regularly instructed by both developers and Local Planning Authorities (LPA’s) who are keen to ensure a satisfactory outcome from the planning process, (i.e. an appropriate balance between tree retention and realizing a site's development potential). All such work is carried out in accordance with the guiding principles of British Standard 5837 ‘Trees in Relation to Construction – Recommendations.’
Mr. Booth is a Bond Solon/Cardiff University trained Expert Witness and a member of the Expert Witness Institute. He has many years experience in both courtroom and planning enquiries.
Tree Inspection & Survey - Single Tree, Large Population, Mortgage Lending, Safety and Subsidence Issues
Tree Preservation Orders (TPO's) and Conservation Areas - Detailed Specifications for Tree Work Applications for Trees with Statutory Protection
Trees and Development - Tree Surveys for Submission with Planning Applications Tree Constraints Plans (TCP’s) Tree Protection Plans (TPP’s) Arboricultural Impact Assessments (AIA) Arboricultural Method Statements (AMS)
Stephen George has over 40 years of Landscape Design and Construction Defect experience. Mr. George has owned and operated Landscapes West since 1980, and is still providing design / build and maintenance services to his clients. His projects have included commercial, apartments, condominiums, and residential landscapes.
Mr. George is a member of the California Landscape Contractors Association (CLCA), the Forensic Expert Witness Association (FEWA), the Irrigation Association (IA), the International Society of Arboriculture (ISA), the National Concrete Masonry Association (NCMA), and the Interlocking Concrete Paver Institute (ICPI).
Litigation Support - Stephen George is an Industry Expert for C-27 Landscape Construction. He provides litigation and consulting services to attorneys representing both Plaintiff and Defendant. His expertise has been called upon throughout the state of California, Nevada, and New York. Mr. George's services include inspection and cost of repair and replacement, review of project drawings, photography / forensic imaging and construction documentation, aboriculture analysis, and landscape construction defects and failures.
John A. Harris, Principal of Landscape Economics, LLC, and President of Earth Advisors, Inc., is a LANDSCAPE ECONOMIST who has worked in the Arboriculture, Forestry, landscape and horticultural fields for over 20 years. Mr. Harris has provided reputable consulting, education and project management services for a wide variety of projects across the United States and internationally, in both temperate and tropical ecosystems.
Areas of Expertise:
Expert Witness for Arboricultural, Landscape, Nursery Values and Conditions
The number of storms in recent years increases the need for better tree and landscape decisions for property owners. Research regarding landscape damages for different storm intensities, what plants get knocked down by winds more often, and priorities for landscape restoration have been intensified by many southern state universities' forestry and horticultural departments.
Trees and landscapes have been valued since humans were given gardens for food and enjoyment. Once people determined how to harvest seeds, how to plant gardens and landscapes, and how to relocate trees and plants, then decisions about what to use and what not to use began to set values for plants. It is this author's opinion that these practices logically date back to the beginning of history.
The value of a tree can only be determined if we agree. Any value given, whether by a layperson or a professional, is real when another person involved in the process agrees to that value. The value used in the final decision can also be a different value from the one determined by the experts who worked on it (especially when the experts worked on different sides of a valuation case).
Julian Forbes-Laird is a Chartered Arboriculturist, Arboricultural Association Registered Consultant, experienced Expert Witness and Principal Consultant of Forbes-Laird Arboricultural Consultancy Ltd. Mr. Forbes-Laird has a professional practice working throughout the UK and overseas. He covers all aspects of arboriculture, specializing in planning, tree safety and litigation related matters.
Mr. Forbes-Laird is supported by a team of regionally based consultants, giving him national and international reach. He sets the standard for client service, works throughout the UK and abroad, provides commercially realistic strategic advice, prepares sensitive yet practical management plans, works within project design teams to evolve arboriculturally defensible layouts, wins planning appeals, and handles an enormous amount of work under pressing deadlines helping clients' achieve the best outcome.
Mr. Forbes-Laird is widely recognised as an authority on legal issues pertaining to trees and is an experienced Expert Witness. His expert services include Pre-Action Case Evaluation, TPO Prosecutions, Forensic Accident Investigation and Tree Root Damage to Buildings. Other Services Include:
Siegfried Guggenmoos, B.Sc.(Agr.), P.Ag., Principal of Ecological Solutions, Inc. is a Professional Agrologist, with over 30 years of experience in the electric/gas utility corridor vegetation management business.
Mr. Guggenmoos has designed, implemented and provides assessments of utility vegetation management programs. In evaluating the prudence of vegetation management programs Mr. Guggenmoos has developed methodologies to assess their efficacy by predicting the impact of vegetation management program as practiced, on the future costs and reliability of electric systems.
Areas of Consultation:
Storm hardening electric transmission and distribution systems to quantitatively manage tree-caused service interruptions
Advise and develop protocols for assessments of power line tree exposure and mitigation
Advise on least cost vegetation management by synchronizing economics and ecology
Advise on impacts of vegetation management program alternatives, modifications
Provide context for vegetation management, greenhouse gas mitigation measures in a competitive energy market
Facilitate for management, staff, contractors and stake holders an actionable understanding of ecological principles and their impacts on vegetation management needs and costs
Provide project management; expert review of programs and proposals
Develop and advise on quantification, monitoring and verification of biotic greenhouse gas mitigation measures
Abstract — Severe weather events such as ice and tropical storms routinely cause extensive damage to electrical distribution systems. Much of the damage and service loss can be attributed to trees. Events where service restoration spans days or weeks are generally closely examined through regulator directed hearings. Even when no specific actions are subsequently
Abstract - For power transmission systems compliant with safety codes and reliability standards there remains a risk of tree-caused interruptions from the in-fall of trees from outside the right-of-way. This paper reports on the quantification of tree exposure outside National Grid’s transmission corridors and examines the variables impacting the risk of a line contact by trees
David D. Hunter is a Registered Consulting Arborist with ASCA, USFS Trained Tree Risk Assessor, ISA Certified Arborist. ISA Tree Risk Assessor Qualified Professional Plan Appraiser and Professional Forester. Providing both Expert Witness and Consulting Services. David D. Hunter has been called upon to testify in court and has helped his clients reach resolution prior to trial. His services include: Expert Witness in Arboriculture and Forestry, professional plant appraisals of landscapes, trees and timber trespass, Tree Forensics as to why a tree or tree part failed causing injury or death, tree health and hazard/ risk assessments, and insurance claims relating to damage to tree, or people/property damaged by trees. David D. Hunter has over 40 years of experience from working in forestry, wildland fire and the field of arboriculture. David D. Hunter has been a consultant and expert witness in these fields for over 25 years. David D. Hunter services the western United States but is available nationwide.
Areas of Expertise:
Arboricultural and Timber Trespass Issues
Tree Surveys and Tree Protection Plans
Tree Preservation Plans and Construction Sequences
Hazard Tree Evaluations and Reports
Appraisal of Loss Reports regarding Landscape Value Loss
Training & Certifications:
Certified as an Arborist PN-1068A, by the International Society of Arboriculture (ISA) - 1997-Present
Graduate American Society of Consulting Arborists (ASCA), Arboriculture Consulting Academy
Tree Failure Training Conference, Certified as Evaluator Portland, OR
Registered Consulting Arborist membership in ASCA, RCA #408 (2003)
US Forest Service Hazard Tree Risk Assessor Trained since 1979
Certified Tree Risk Assessor (CTRA) by PNW ISA # PN-0150 (2006)ISA Tree Risk Assessor Qualified (2017)