Stormwater Expert Witnesses

Concord, California

Civil Engineering, Hydrology - Flooding, Sewer, Lateral, Hydraulic Modeling, Groundwater, Weir, Spillway, Culvert, Pipeline, PACP, Stormwater, Hydrogen Sulfide, Septic, Sinkhole, Water treatment, Water intrusion, Drainage, Green infrastructure, Rain garden, Infiltration

Ms. Abadie is a Civil Engineer with a background in hydrology and water resources. She provides root cause and scope of damage evaluations and expert witness services. Prior to joining EDT, Ms. Abadie worked in multiple sectors of water and wastewater: groundwater protection, drinking water treatment and distribution, wastewater collection and treatment, urban runoff control, watershed assessment, and asset management. She spent twelve years as a collection system engineer for the City and County of San Francisco where she developed San Francisco’s Combined Sewer Discharge inspection program, installed dozens of flowmeters, walked and crawled through hundreds of miles of sewers, designed two baffles, ran model simulations, investigated flooding claims, oversaw repairs of large underground concrete structures, and pulled a bicycle out of a pump station inlet. Join her for a tour of San Francisco’s most beautiful combined sewer outfall here: https://www.kqed.org/news/11782405/tunn...

Denver, Colorado

Hydrology, Civil Engineering - Water Resources, Hydraulics, Floodplain, Flood Forensics, Hydrologist, Hydraulic Modeling, Transportation Drainage, Roadway Drainage, Rainfall, Runoff, Design Storms, Sedimentation, Sediment Transport, Stormwater, Culvert, Stormsewer, Urban Hydrology, Urban Flooding, Construction

Water flows downhill, sometimes water is a resource, sometimes it is an enemy, sometimes it is both. If your case involves the impact of water, my expertise is available for your case. I am an expert in hydrology, hydraulics, the engineering of drainage systems, including culverts, transportation drainage, bridge scour, bridge hydraulics, floodplain management, transportation hydraulics, water resources, and accidental death or drowning near hydraulic structures. My work routinely produces technical evidence that is hard to dispute and easy to understand. My background and experience in consulting and teaching allows me to produce complicated information in a format that is easy to digest, such as video files, and images that explain the complicated physical interactions of hydrology and hydraulics. Some of my past litigation work produced evidence that was not disputed by opposing experts. My approach is to first understand the case, then to discuss one on one what technica...

Meridian, Idaho

Hydrology, Civil Engineering - Floodplain, Flooding, Hydrology, River Hydrualics, Levee Breach, Dam Break/Failure, Stormwater, FEMA, Advanced Modeling, Storm Recreation, Erosion, Rainfall, Flood Forensics, Bridge Hydraulics, Water Resources

Mr. Chad Ballard is a licensed Professional Engineer (P.E.) across multiple states, specializing in water resources, hydrology, and hydraulics. He possesses a deep technical background in advanced flood modeling and stormwater mitigation. Has experience working on cases involving failure of drainage infrastructure, dam/levee failures, scour and erosion, flood damages, hydroplanning, etc. His core competencies include: Stormwater and Drainage Design: Designing and analyzing systems to manage stormwater and prevent loss of life and property. Advanced Numerical Flood Modeling: Expert-level proficiency in hydraulic and hydrologic modeling tools to recreate rainfall and storm events. Flood Warning Systems: Developed modern flood warning systems for private and public clients. Forensic Engineering: Assists legal professionals across the United States and Canada. Mr. Ballard is a recognized educator and leader in his field. He has served as an adjunct faculty m...

East Lansing, Michigan

Civil Engineering, Environmental Engineering - Groundwater, Wastewater, Remediation, Bioremediation, Modeling, Stormwater, Hydrogeology, Hydrology, Geotechnical, Microbiology, Contamination, Geochemistry, Construction, Demolition, Home Inspection

Dr. TImothy Mayotte is President and CEO of Mayotte Design & Engineering, PC, a civil and environmental engineering design firm based in East Lansing, Michigan. Since 2003, MD&E has proved itself a highly responsive design, advocate and risk management partner for clients in the energy, automotive, commercial printing, textile, pharmaceutical, chemical, real estate, and legal industries. MD&E offers a variety of services, specializing in the design and engineering of treatment solutions for wastewater, groundwater, stormwater and contaminated soil, sediment and air. Dr. Mayotte has assisted clientele across globe, having completed projects in: Alabama; Arizona; California; Colorado; Connecticut; Illinois; Indiana; Iowa; Kansas, Massachusetts; Michigan; Missouri, Mississippi; Nevada; New Jersey; New York; Ohio; Oregon; Tennessee; Texas; Vermont; Virginia; West Virginia; Washington, Wisconsin; Wyoming; British Columbia; Ontario; Quebec; Brazil; China; Czech Republic; Italy; and Mex...

Cleveland, Ohio

Engineering, Land Surveying - stormwater, infrastructure, water, asphalt, riparian, construction, pavement, erosion, water quality, environment, site development, sewer, drainage, concrete, condominium, underground, accident, pump, airport, boundary

Mr. Zwick is an experienced licensed Professional Engineer and Professional Land Surveyor in Ohio regarding expert testimony, reports and consultation. He holds the degrees of Master of Science cum laude, and Bachelor of Science, from Case Western Reserve University in Systems Engineering, and in Civil Engineering, respectively. He now serves as the Chief Deputy Engineer of the Office of the Lorain County Engineer. He has also served as an expert witness for claims involving storm water management, underground infrastructure, site development, construction of pavements, land surveying and highway accidents. Mr. Zwick has practiced engineering and land surveying in both the public and private sectors throughout Ohio, and his experience has served the: construction industry, various levels of government, libraries, museums, schools and universities, insurance companies, architects, and other professionals including the legal community. He has programmed, engineered and supervised ...

Monroeville, Pennsylvania

Civil Engineering, Geotechnical Engineering - Stormwater, Erosion and Sediment Control, Hydrology, Landslides and Slope Stability, Foundations, Settlement, Retaining Walls, Geohazards, Pavement Evaluation and Remediation, Earthwork, Construction and Materials Testing, Americans with Disabilities Act (ADA) Accessibility

Mr. Sheleheda specializes in geotechnical and civil engineering. His experience includes providing geotechnical engineering design/expertise for all aspects of land development and construction. Projects have included establishing procedures for subsurface explorations, boring layout, soil sampling, and laboratory testing programs. Michael has authored geotechnical reports regarding deep, shallow, and specialty foundation construction for projects in the real estate, natural gas, manufacturing, mining and public client sectors. Also, he has investigated and provided remedial recommendations for landslides, carbonaceous (expansive) shale, retaining walls, karst, geohazards, and mine grouting/subsidence. His responsibilities have included preparing bid packages, authoring specifications, and construction level drawings, as well as preparing expert reports for the legal and insurance industries. In addition, Michael has experience in the preparation of erosion and sediment control pla...

Center , Pennsylvania

Geology, Environmental - Groundwater, Hydrogeology, Geology, Geo-Hazards, Mining, Stormwater, Oil & Gas, Bedrock Aquifer, Groundwater Contamination, Environmental Forensics, Environmental Evaluation, Environment, Water Resources, Water Supply, Karst, Karst Geology, Karst Hydrogeology, Sinkholes

Expertise in hydrogeology, geology and environmental forensics with a specialization in groundwater flow and contaminant transport in fractured bedrock aquifers. Mr. Gillespie's technical expertise is complemented by an industry insider’s savvy of corporate needs and operations and the regulatory acumen of a former agency reviewer and bureau official. He is a published researcher in hydrostructural geology and karst hydrogeology, an adjunct university professor of geology and a frequent provider of continuing professional education courses. Mr. Gillespie is routinely invited to speak on matters of earth, environment and energy to government committees, national business organizations and educational institutions. He developed and leads a geoResource Risk Reduction practice, specializing in strategic representation in regulatory and legal venues. Mr. Gillespie has provided litigation support, testifying expert services, expert regulatory negotiation support and public representa...

Lancaster, Pennsylvania

Environmental, Hydrology - sinkhole, groundwater, landslide, drilling, hydrogeology, rockfall, karst, vibration, blast, earthquake, contamination, pipeline, fracking, water, erosion, construction, stormwater, physics, leak, cave

Dr. Bechtel is geophysicist/geologist, and a world-renowned expert on sinkholes. But not just sinkholes; bedrock conditions, caves, water pollution, and all issues related to karst terranes. Dr. Bechtel has 25+ years of experience in the engineering/environmental industry, as well as faculty positions at Franklin & Marshall College, the University of Memphis and the University of Pennsylvania, and is an appointed member of the International Karst Commission. Dr. Bechtel has been an expert in dozens of sinkole or karst-related cases - often related to causes of sinkholes and/or water problems. Dr. Bechtel also has expertise and courtroom experience in Unconventional Oil & Gas, hydraulic fracturing (fracking), and fracking-industry-related earthquakes, horizontal directional drilling (HDD), as well as all fields of seismology, seismic hazards, vibration monitoring and analysis, subsidence, soil creep, landslides, rockfalls, non-destructive evaluation of earthen dams and levees, subsu...

Texas

Hydrology, Civil Engineering - Water Resources, Hydraulics, Floodplain, Flood Forensics, Hydrologist, Hydraulic Modeling, Transportation Drainage, Roadway Drainage, Rainfall, Runoff, Design Storms, Sedimentation, Sediment Transport, Stormwater, Culvert, Stormsewer, Urban Hydrology, Urban Flooding, Construction

Water flows downhill, sometimes water is a resource, sometimes it is an enemy, sometimes it is both. If your case involves the impact of water, my expertise is available for your case. I am an expert in hydrology, hydraulics, the engineering of drainage systems, including culverts, transportation drainage, bridge scour, bridge hydraulics, floodplain management, transportation hydraulics, water resources, and accidental death or drowning near hydraulic structures. My work routinely produces technical evidence that is hard to dispute and easy to understand. My background and experience in consulting and teaching allows me to produce complicated information in a format that is easy to digest, such as video files, and images that explain the complicated physical interactions of hydrology and hydraulics. Some of my past litigation work produced evidence that was not disputed by opposing experts. My approach is to first understand the case, then to discuss one on one what technica...