Mark Ketchum
Vice President
email:
Telephone:
415 989 4551 x214
Registration:
Professional Engineer in California (Civil: C31075, Structural S5026)
Education:
Ph.D. - Civil Engineering, University of California, Berkeley, 1986
M.S. - Civil Engineering, University of California, Berkeley, 1977
B.S - Civil Engineering, Worcester Polytechnic Institute, 1975
Employment History:
1992-presentOPAC Consulting Engineers, Vice President and Principal Engineer
1977-1981, 1989-1992T.Y. Lin International, Engineer and Principal
1987-1989Wiss, Janney, Elstner Assoc., Senior Engineer
1975-1976Earl and Wright Engineers, Intern Engineer
1975-1977, 1981-1986University of California at Berkeley, Research and Teaching Assistant / Associate
Professional Experience
Mark Ketchum has 32 years of experience in design, rehabilitation, construction support, research, and investigation of bridges, buildings, and industrial structures. Dr. Ketchum is known for taking on unusual design challenges and technical assessments. His design approach, focusing on rational and constructible forms, has produced several notable structures. He has developed and implemented technologies for construction staging analysis, seismic evaluation, collapse analysis, and wind evaluation.
Key Qualifications
- Management of complex bridge projects.
- Production of contract documents for bridge projects.
- Development of seismic criteria for bridges.
- Design of bridges to meet high aesthetic standard.
- State-of-the-art seismic analysis of bridge structures.
- Design of bridges utilizing segmental cantilever construction method.
- Design of viaduct structures to accommodate strict urban and traffic constraint.
- Design of long span bridges.
- Preparation of bridge evaluation/design reports.
- Retrofit concept development for bridge structures.
- State-of-the art structural modeling analysis techniques.
- Design of cable-supported bridges.
- Design of high speed rail bridges.
- Wind evaluation of long span bridges.
- Design of pedestrian bridges.
- Implementation of technologies for nonlinear seismic evaluation of bridges.
- Development of technologies for time-dependent construction staging analysis of bridges.
Relevant Project Experience
Selected projects by Mark Ketchum are listed below:
Hoover Dam Bypass: Colorado River Bridge - Construction Engineering
Construction engineering for a 1,090 ft concrete arch bridge downstream of the Hoover Dam.
Nevada-Arizona. Construction completion 2010
Nanning Bridge - Design
A 300 m span steel arch bridge across the Yong River. The arch ribs are steel box sections and the deck consists of a steel box girder with an orthotropic deck.
Nanning City, China. Construction completed 2009
Third Carquinez Strait Bridge - Design
A 728 m span suspension bridge with a steel orthotropic deck. The new suspension bridge replaced a 75 year old truss bridge across the Carquinez Strait.
Sacramento River, Crockett - Vallejo, California. Construction completed 2004
Berkeley I-80 Pedestrian Overcrossing - Design
A 90 m span arch bridge for pedestrian and bicycle across the I-80 freeway in Berkeley. The steel arch ribs consist of curved inclined steel pipes in a basket handle configuration.
Berkeley, California. Construction completed 2002
Rama IX Bridge Tenth Year Inspection - 10th Year Inspection & Evaluation
Tenth year structural inspection of a 450 m span cable-stayed bridge across the Chao Phraya River in Bangkok.
Bangkok, Thailand. Evaluation completed 2001
Maysville Bridge - Design Support, Construction Support
Design and construction support of a 1,050 ft span cable-stayed bridge across the Ohio River. The 60 ft wide deck consists of steel edge girders supporting a composite precast panel deck.
Ohio River, Maysville, Kentucky - Aberdeen, Ohio. Construction completed 2000
Arroyo Cangrejillo Bridge - Design and Construction Supervision
Design and construction supervision of a 337 m span unstiffened suspension bridge across an environmentally sensitive valley in Argentina. The bridge carries a foot path and mining copper-concentrate pipeline.
Andalgala, Catamarca, Argentina. Construction completed 1998
Koror - Babeldaob Bridge - Collapse Investigation
Collapse investigation of a post-tensioned concrete box girder bridge in Micronesia built by segmental construction.
Republic of Palau, Micronesia. Investigation completed 1998
Pittsburg Coke Storage Domes - Design and Contractor Support
Design of three reinforced concrete petroleum coke storage domes at the Pittsburg Marine Terminal. Each hemispherical dome is 160 feet in diameter.
Pittsburg Marine Terminal, Pittsburg, California. Construction completed 1997
Lake Redding Bridge - Design
Design of a 5-span post-tensioned concrete arch bridge over the Sacramento River. The new bridge reflects and respects the adjacent Diestelhorst Bridge, a historic arch bridge of architectural significance.
Redding, California. Construction completed 1996
St. Johns Bridge - Seismic Susceptibility Study
Seismic susceptibility study of a historic suspension bridge across the Willamette River.
Portland, Oregon. Investigation completed 1996
San Francisco - Oakland West Bay Crossing - Seismic Evaluation
Seismic analysis of the West Bay Crossing of the San Francisco-Oakland Bay Bridge. The West Bay Crossing is a tandem suspension bridge with main spans of 704 m.
San Francisco - Oakland, California. Study completed 1994
Tacoma Narrows Bridge - Seismic Evaluation
Seismic investigation of a 2800 ft span suspension bridge.
Tacoma, Washington. Evaluation completed 1993
Golden Gate Bridge Structural Investigations - Seismic Evaluation
Seismic evaluation and retrofit studies for this world famous suspension bridge.
San Francisco, California. Evaluation completed 1991
SR-182 Columbia River Bridge - Design
A cast-in-place segmental bridge with three 450-ft center spans across the Columbia River.
Richland - Pasco, Washington. Construction completed 1985
Lewiston-Clarkston Bridge - Design
A cast-in-place prestressed concrete segmental bridge across the Snake River.
Lewiston, Idaho and Clarkston, Washington. Design completed 1979
Ruck-A-Chucky Bridge - Design
A hanging arc design across the American River.
Auburn, California. Design completed 1978