Hydrology Expert Witnesses
Hydrology expert witnesses and consultants listed here may be able to form expert opinions, draft expert witness reports, provide expert witness testimony at deposition and/or trial as or serve as consulting (non-testifying) experts on hydrology. The hydrology expert witness listings on this page are typically from fields/areas of expertise such as: Civil Engineering, Construction Defects, Engineering, Environmental, Environmental Engineering, Geotechnical Engineering, Hydrology, and Structural Engineering.
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James J. Connors, Ph.D.
Expert in Environmental Contamination & Stormwater
James J. Connors & Associates, LLC
Mobile, Alabama
Hydrology, Environmental
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PFAS, AFFF, PCBs, Landfill Leachate, Groundwater Contamination, PFOS, Flooding, Stormwater Runoff, PFOA, CAFO, Erosion, Sedimentation, Above Ground Storage Tanks, Underground Storage Tanks (USTs), Mining, CERCLA, RCRA, Hydrogeology, Hydrology, Environmental Impacts
NATIONWIDE PRACTICE in surface and subsurface hydrology.
EXPERT IN ENVIRONMENTAL CONTAMINATION - Contamination of groundwater, soil, sediment, particulate, and surface-water by a variety of substances, including PFAS (PFOS, PFOA, others), PCBs, pesticides, herbicides, nutrients, radiation, metals, wood preservatives, fuels, microbes, disinfectants, oilfield brine, fracking fluids, drilling mud, BTEX, VOCs, SVOCs, solvents, and chlorinated solvents, such as trichloroethylene (TCE), tetrachloroethylene (PCE), dichloroethylene (DCE), vinyl chloride, chloroform, carbon tetrachloride, 1,1,1-trichloroethane, 1,1-dichloroethane, etc. Also, landfill leachate releases, oil and chemical spills, applications of aqueous film-forming foam (AFFF), underground and above-ground storage tank leaks, concentrated animal feeding operation (CAFO) releases, etc.
EXPERT IN STORMWATER HYDROLOGY - Runoff-related impacts such as flooding, erosion, and sediment transport and deposition.
EXPERT IN GENERAL A...
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David T Williams, PhD, PE, PH, CFM, CPESC, F.ASCE, D.WRE
DTW and Associates, Engineers, LLC
California
Civil Engineering, Hydrology
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floodplain flooding, hydrology, river hydraulics, stream bank protection, stream restoration, fluvial geomorphology, levees, erosion control, stream bank failure, erosion control plans, best management practices, FEMA floodplain studies
Dr. David Williams, PE (CO, AZ, CA, LA, MO, NM, TX, HI, MS, OR, WA) has over 45 years of experience in the water resources industry and is known for his contributions to the industry. He is also a recognized expert in sedimentation engineering and in developing innovative solutions to difficult hydraulic and hydrologic design problems in rivers and estuaries. Dr. Williams previously served as a two-time President of the International Erosion Control Association (IECA). He has served as chair of the American Society of Civil Engineers (ASCE) Technical Committees on Sedimentation, Computational Hydraulics, River Restoration, and Risk, Uncertainty and Probabilistic Approaches. He served as a committee member of ASTM A05.12 (Wire specifications) and on ASTM D18.25 (Erosion Control Products). While chair of the Federal Interagency Technical Committee on Sedimentation, he worked with hydraulic and sedimentation experts from the Federal Highway Administration, Bureau of Reclamation, U.S. ...
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Yasser M. Abdelhamid, PhD
Construction Defect/Geotechnical Expert Witness
Bryant Consultants
California
Geotechnical Engineering, Construction Defects
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Civil Engineering, Expansive Soil, Foundation Analysis and Design, Settlement, Heave, Pavement, Retaining Walls, Slope Stability, Numerical Modeling, Seepage, Drainage, Erosion, Hydrology, Seismic, Earthquake Engineering, Laboratory Testing, Structural Engineering, Construction Defects
Dr. Abdelhamid has been designated as an expert witness for many litigated cases. Dr. Abdelhamid is heavily involved in performing forensic geotechnical and geophysical investigations for several problematic foundations, pavements, retaining walls and slopes. He devises protocols for geotechnical and geophysical testing, in-situ long-term monitoring, lab testing and analysis. He is also heavily involved in preparing and reviewing proposals and expert reports for geotechnical exploration and litigated and non-litigated forensic projects. Dr. Abdelhamid is responsible for meeting clients during the proposal phase, the investigation phase and after releasing the final report to ensure client satisfaction. Dr. Abdelhamid has performed work at wide variety of forensic projects. He evaluated numerous residential buildings from single family house to a whole subdivision. Dr. Abdelhamid also evaluated many commercial, school, hospital, garage buildings. He performed stability analysis for v...
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David T Williams, PhD, PE, PH, CFM, CPESC, F.ASCE, D.WRE
DTW and Associates, Engineers, LLC
Commerce City, Colorado
Civil Engineering, Hydrology
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floodplain flooding, hydrology, river hydraulics, stream bank protection, stream restoration, fluvial geomorphology, levees, erosion control, stream bank failure, erosion control plans, best management practices, FEMA floodplain studies
Dr. David Williams, PE (CO, AZ, CA, LA, MO, NM, TX, HI, MS, OR, WA) has over 45 years of experience in the water resources industry and is known for his contributions to the industry. He is also a recognized expert in sedimentation engineering and in developing innovative solutions to difficult hydraulic and hydrologic design problems in rivers and estuaries. Dr. Williams previously served as a two-time President of the International Erosion Control Association (IECA). He has served as chair of the American Society of Civil Engineers (ASCE) Technical Committees on Sedimentation, Computational Hydraulics, River Restoration, and Risk, Uncertainty and Probabilistic Approaches. He served as a committee member of ASTM A05.12 (Wire specifications) and on ASTM D18.25 (Erosion Control Products). While chair of the Federal Interagency Technical Committee on Sedimentation, he worked with hydraulic and sedimentation experts from the Federal Highway Administration, Bureau of Reclamation, U.S. ...
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Chad Ballard, PE, CFM
Surface Water and Flood Expert (Nationwide)
High Water Mark
Meridian, Idaho
Hydrology, Civil Engineering
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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...
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Christopher R Hanstad, P.E., CFM
Flood and Drainage Expert Witness
Hanstad Engineering Services
Champaign, Illinois
Civil Engineering
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Floodway Violations, Floodplain Modeling, Flood Damage and Loss Assessment, Hydrology, Hydraulics, FEMA Floodplain Revisions, Drainage
Chris Hanstad is a Licensed Professional Engineer (IL, IN, KY, WI) and Certified Floodplain Manager with over 15 years of expertise in floodplain analysis and regulatory compliance with the National Flood Insurance Program (NFIP). Since 2018, he has served as an expert witness in flooding and drainage-related litigation, providing written reports, discovery deposition, and trial testimony.
As the lead of Illinois’ Letter of Map Revision (LOMR) program since its inception, Mr. Hanstad has overseen the evaluation and determination of hundreds of LOMR applications, ensuring compliance with rigorous floodplain modeling standards and NFIP regulations. His work directly informs revisions to FEMA floodplain maps.
Mr. Hanstad specializes in assessing the flood risk impact of projects within floodplains, particularly their effects on adjacent properties. He has identified and reported seven floodway violations to FEMA and has provided litigation support in cases involving such violations. ...
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John Hlinka, PE, M. ASCE
Benton, Kentucky
Structural Engineering, Civil Engineering
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civil, railroad, accident, cranes, failures, foundations, structures, drainage, culverts, washouts, hydrology, concrete pump trucks, corrosion, chemical, industrial, building codes, inspections, construction, OSHA Compliance, swimming pools
Mr. Hlinka has worked over 40 years in the Engineering, Procurement and Construction Management market with experience in numerous industries: Chemical, Oil Refinery, Pulp & Paper, Adhesives, Nuclear Power Generation, Nuclear Feed Stock, and Steel. His work has overlapped with residential and commercial industries. Throughout his career he has engineered and managed a myriad of projects in these industries and has provided leadership to the various companies in the capacities of: Site Manager, Design Manager, Project Manager, Construction Supervisor, and currently as President. Design engineering, analysis, and inspection experience includes structural steel, reinforced concrete, stone, masonry, wood, and stormwater drainage.
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Timothy J. Mayotte, Ph.D., CPG, P.E.
Mayotte Design & Engineering
East Lansing, Michigan
Civil Engineering, Environmental Engineering
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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...
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John E Skidmore, PE, BSCE
Forensic Civil Engineer (Multi-state)
Owosso, Michigan
Civil Engineering, Hydrology
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Building science, Hydrology, Water leaks, Auto impact assessment, Moisture Intrusions, Drainage, On-site sewage disposal, Construction defects, Flooding, Roofing, Foundations, Geotechnical, Storm damage assessment
Forensic engineer with experience in a wide variety of activities within the civil engineering discipline, including land planning, surveying, hydrology and hydraulics, geotechnical and foundations and on-site sewage disposal facilities. Licensed Professional Engineer in Alabama, Florida, Illinois, Indiana, Iowa, Louisiana, Michigan, Ohio, Pennsylvania, Texas, West Virginia, Wisconsin. Testified as an expert at arbitrations, depositions, and trials. Subjects included drainage and flooding, water intrusions, pipe leaks and structural damage to buildings from vehicle impacts, tree impacts and storms.
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Chuck Dutill, PE, DFE
Hydrology and Environmental Engineering Expertise
Heritage Technical Services, Inc.
Philadelphia Area, Pennsylvania
Environmental, Engineering
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Hydrology, Stormwater Management, Sewers, Sewer Systems, Wastewater, Sanitary Sewage, Water, Septic Systems, Flooding, Groundwater, Hydrogeology, Drainage, Mold, Wells, Runoff, Backups, Wastewater Treatment, Utility, Construction, Maintenance
Nationwide experience as hydrologist, environmental engineer, and civil engineer, including for design, contamination, pollution, FOG/grease trap, sinkhole, grading, hydraulics, pumping, water quality, storm sewer, drinking water, water distribution, water treatment, dam, regulations, Standard of Care, waste management, erosion, soil, air quality, water main, detention, hazardous waste, spill, sedimentation, wetland, floodplain, toxicity, remediation, health and safety, modeling, odor, combined sewer, overflow, aquifer, hydraulic fracturing, hydroplaning, and metering.
Forensic cases for Mr. Dutill have comprised state and federal courts. As indicated in feedback from attorneys on expert witness cases, some of the strengths of Mr. Dutill include understandable guidance, responsiveness, timeliness, communication, effective report writing, strong testimony (including on cross), efficiency, organization, and assistance with framing case issues.
Approximately 45% of his cases have be...
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Michael Sheleheda, P.E.
Civil & Environmental Consultants, Inc.
Monroeville, Pennsylvania
Civil Engineering, Geotechnical Engineering
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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...
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Jens Figlus, PhD
Bryant Consultants
Carrollton, Texas
Civil Engineering, Engineering
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Wave modeling, subsidence, scour, vessel wakes and propeller wash, Environmental fluid mechanics, Fluid-sediment-structure interactions, Coastal processes, Field measurements, Hydraulic engineering, Coastal protection, Hydrology, Sedimentation, Coastal Erosion
Jens Figlus is a coastal engineering expert with 12 years of experience. He works with Bryant on expert witness cases and projects related to sediment erosion, coastal flooding, water waves, fluid-soil-structure interactions, and issues related to ship-induced hydrodynamics, such as vessel wakes and propeller wash. His background is in applied coastal research and engineering, hydraulic engineering, and environmental fluid mechanics.
Dr. Figlus is an Associate Professor in the Ocean Engineering Department at Texas A&M University. He heads the Coastal Engineering Laboratory (CEL) on A&M’s Galveston Campus and is a distinguished partner with the A&M Institute for a Disaster Resilient Texas (IDRT).
His expertise includes field and laboratory measurements (piezo-electric, acoustic Doppler, sediment tracer, optical backscatter, laser anemometry, remote sensing) as well as process-based numerical modeling (CShore, XBeach, Delft3D, Funwave) related to nearshore and estuarine hydrodynamic...
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Kenneth R Dees, P.E.
Storm Water Engineering Senior Technical Authority
CM2E
Fort Worth, Texas
Civil Engineering, Hydrology
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floodplain, detention pond, drainage failures, downstream impact, flooding claims, FEMA, hydrology, hydraulics, diversion of storm waters, rivers, creeks, bridges, culverts, site plans, subdivision development, stormwater design, site development, flooding claims, regulatory compliance, forensice engineering
Kenneth Dees, P.E. CFM has over 40 years of experience in the water resources industry and is a senior technical authority regarding storm water, drainage and floodplain engineering. A graduate of Southern Methodist University (1984), he is a business owner, project manager and civil engineer who has been involved in some of the largest projects in the history of the State of Texas. He has considerable expertise pertaining to topics related to storm water engineering of all types.
After graduation from SMU, Mr. Dees began his career at MCI Telecommunications where he was responsible for tracking all construction projects on a nationwide scale and reporting to the chief engineer for this multi-billion dollar company. During this time, he made a discovery of how to connect maps to data which greatly expanded the capability to manage infrastructure of all types. This discovery lead to creation of a software company a short three years after college, which would morph into Chalk Mo...
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David T Williams, PhD, PE, PH, CFM, CPESC, F.ASCE, D.WRE
DTW and Associates, Engineers, LLC
Texas
Civil Engineering, Hydrology
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floodplain flooding, hydrology, river hydraulics, stream bank protection, stream restoration, fluvial geomorphology, levees, erosion control, stream bank failure, erosion control plans, best management practices, FEMA floodplain studies
Dr. David Williams, PE (CO, AZ, CA, LA, MO, NM, TX, HI, MS, OR, WA) has over 45 years of experience in the water resources industry and is known for his contributions to the industry. He is also a recognized expert in sedimentation engineering and in developing innovative solutions to difficult hydraulic and hydrologic design problems in rivers and estuaries. Dr. Williams previously served as a two-time President of the International Erosion Control Association (IECA). He has served as chair of the American Society of Civil Engineers (ASCE) Technical Committees on Sedimentation, Computational Hydraulics, River Restoration, and Risk, Uncertainty and Probabilistic Approaches. He served as a committee member of ASTM A05.12 (Wire specifications) and on ASTM D18.25 (Erosion Control Products). While chair of the Federal Interagency Technical Committee on Sedimentation, he worked with hydraulic and sedimentation experts from the Federal Highway Administration, Bureau of Reclamation, U.S. ...
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Yasser M. Abdelhamid, PhD
Construction Defect/Geotechnical Expert Witness
Bryant Consultants
Carrollton, Texas
Geotechnical Engineering, Construction Defects
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Civil Engineering, Expansive Soil, Foundation Analysis and Design, Settlement, Heave, Pavement, Retaining Walls, Slope Stability, Numerical Modeling, Seepage, Drainage, Erosion, Hydrology, Seismic, Earthquake Engineering, Laboratory Testing, Structural Engineering, Construction Defects
Dr. Abdelhamid has been designated as an expert witness for many litigated cases. Dr. Abdelhamid is heavily involved in performing forensic geotechnical and geophysical investigations for several problematic foundations, pavements, retaining walls and slopes. He devises protocols for geotechnical and geophysical testing, in-situ long-term monitoring, lab testing and analysis. He is also heavily involved in preparing and reviewing proposals and expert reports for geotechnical exploration and litigated and non-litigated forensic projects. Dr. Abdelhamid is responsible for meeting clients during the proposal phase, the investigation phase and after releasing the final report to ensure client satisfaction. Dr. Abdelhamid has performed work at wide variety of forensic projects. He evaluated numerous residential buildings from single family house to a whole subdivision. Dr. Abdelhamid also evaluated many commercial, school, hospital, garage buildings. He performed stability analysis for v...
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Michael F Myers, PE
Storm Drainage Expert
30 Scale, LLC
Palmyra, Virginia
Civil Engineering, Hydrology
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Drainage, Hydrology, Hydraulics, Storm Sewer, Stormwater Management, Flooding, Storm Drainage, Grading, Erosion and Sediment Control, Runoff
Michael Myers, P.E. brings over 30 years of civil engineering experience serving as engineer-of-record on a wide range of land development projects involving stormwater management and design. A licensed Virginia Professional Engineer since 1999, Mr. Myers is well-versed in storm drainage, erosion and sediment control, and the investigation of complex stormwater management issues. He has authored detailed technical expert reports in support of legal proceedings and offers clear, grounded analyses as part of his expert witness services. Resume provided on request.
