Register of Experts

LOSS EVENTS - Landslides

Showing 2 Provider(s) found in Landslides
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W. Charles Perry & Associates

Principal Engineer

W. Charles Perry, PE

231 W. 41st Avenue
San Mateo, CA 94403
Phone: (650) 638-9546 Email: Website:


Failure analysis and accident reconstruction of industrial accidents, automobile accidents, personal injuries, building fires, industrial fires, carbon monoxide poisoning, and industrial explosions. Design evaluations of products and buildings at the system and component level. Safety evaluation of construction sites and industrial facilities. Products evaluated include chairs, ladders, rolling-scaffolds and barricades, medical tables, water heaters, space heaters, furnaces, file cabinets windows. Vehicles evaluated include cars, forklifts, bicycle, pedestrian, golf cart and cranes. Fires & explosions include houses & commercial kitchen fires, methamphetamine lab explosion, ammonium perchlorate factory explosion, synthetic crude oil refinery fire, natural gas explosions, urban-wildland fire and print-shop fire. Construction defects & failures evaluated include structural collapse, mold infestations, EIFS failures, slab failures, pipe leaks and breaks, retaining wall failures, sub-sea level sewer tunneling failure, foundation failures, neighborhood flooding, roof and window leakage. Earthquake damage evaluation of residential, light commercial and high-rise buildings.


MS, BS, PE, (Civil Engineering, Mechanical Engineering, Structural Engineering, Materials Engineering, Fire Science & Engineering and Construction Management).

Patrick O. Shires

President/Principal Geotech. Engr./Principal Geophysicist

Cotton, Shires and Associates, Inc.

330 Village Lane
Los Gatos, CA 95030-7218
Phone: (408) 354-5542 Email: Website:


Geotechnical (soils) Engineering; Earthquake Engineering; Geology; Design & Construction Deficiencies; Landslides (earth movement); Expansive Soil. Drainage. Trials; More than 30 trials in Los Angeles area; more than 90 trials in California & Hawaii.



Formal Education

BS, Stanford University; MS, Civil Engineering, Stanford University.

Registration and Licenses

Registered Professional Engineer (CA, CO, OR, WA, ID, HI); Registered Geotechnical Engineer (CA); Registered Geophysicist (CA).

Previous/Current Position

Senior Principal Geotechnical Engineer and Geophysicist.


Industrial Research Associate, USGS; Technical Experts Panel, City of Rancho Palos Verdes.

Prof. Affiliations

American Society of Civil Engineers; Earthquake Engineering Research Institute; CA Geotechnical Engineers Association; Consulting Engineers of CA; American Society of Testing and Materials; Society of Exploration Geophysicists.


ASCE Journal of Geotechnical Engineering and conference papers.

Prior Expert

Over 47 years experience, Testimony at 90+ trials (Municipal, Superior and Federal and binding arbitrations); 230+ depositions; 300+ settlement conferences; Northern and Southern California and Hawaii.

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