Senior Research Scientist for Environmental Science
US Army Engineer Research Development Center
Dr. Bridges is the U.S. Army’s Senior Research Scientist for Environmental Science. He became a Senior Professional (ST) within the U.S. Army in 2006, where his responsibilities include leading research, development and environmental initiatives for the U.S. Army and U.S. Army Corps of Engineers (USACE)
His primary areas of research activity at the U.S. Army Engineer Research and Development Center concern 1) the science and engineering of sustainable infrastructure development 2) the development of risk and decision analysis methods applied to water resources infrastructure and environmental systems, and 3) assessment and management of environmental contaminants. Dr. Bridges research activities support climate change assessment, environmental modeling, and sediment management technologies. His work has been supported by programs within the USACE; the U.S. Army, Navy, and Department of Defense; the U.S. Environmental Protection Agency; and the private sector. His research activities have been recognized through receipt of several USACE and U.S. Army Research and Development Awards, the Government Service Award from the Society of Environmental Toxicology and Chemistry (2009), the Outstanding Practitioner Award from the Society for Risk Analysis (2012), the Army Engineer Association’s Bronze Order of the de Fleury Medal (2014), and the Department of the Army Meritorious Civilian Service Award (2008). In addition to his basic and applied research, Dr. Bridges is also active in providing technical support to USACE Districts, USEPA Regions and others.
Dr. Bridges is the Director of the Center for Contaminated Sediments (CCS) and the Program Manager for the Dredging Operations Environmental Research (DOER) program, one of the Corps’ largest civil works R&D programs, where he directs the execution of more than $6 million in research annually. He currently leads USACE’s Engineering with Nature (EWN) program, which includes a network of research projects, field demonstrations, and communication activities to promote sustainable, resilient infrastructure systems; the EWN program was awarded the 2013 USACE Environmental Award in Natural Resource Conservation and the 2014 USACE Sustainability Award for Green Innovation. He has chaired international working groups for the London Convention and Protocol which have developed technical guidance for assessing sediments as well as managing risks associated with CO2 sequestration operations in the world’s oceans. As U.S. representative to the Environmental Commission of the International Navigation Association (PIANC), Dr. Bridges has led efforts to develop new international standards for managing environmental risks, while promoting environmental benefits, related to navigation infrastructure. Dr. Bridges led efforts on the use of Natural and Nature-Based Features (NNBF) to support coastal resilience within the USACE’s North Atlantic Coast Comprehensive Study following Hurricane Sandy, and currently leads multiple activities related to NNBF development.
He has served on the editorial boards for the journals of Integrated Environmental Assessment and Management, Environmental Toxicology and Chemistry, and Dredging Engineering. He is a member of the Society for Risk Analysis, the Society of Environmental Toxicology and Chemistry, the Society of American Military Engineers, and the World Association for Waterborne Transport Infrastructure (PIANC).
Over the last 20 years, Dr. Bridges has published more than 60 journal articles and book chapters and numerous technical reports. He received his B.A. (1985) and M.A. (1988) in Biology/Zoology from California State University, Fresno and his Ph.D. (1992) in Biological Oceanography at North Carolina State University.
PLATFORM PRESENTER – Contaminated Sediments
Innovative Risk Management Approaches for Contaminated Sediments
Clean-up of contaminated sediments has posed a range of costly challenges within the United States and elsewhere. Removal of contaminated sediments through dredging has been the dominant approach used to pursue clean-up to-date. However, dredging has proven to be both an expensive and complicated tool. Residual levels of contamination remaining after dredging as well as problems associated with wide-spread, diffuse contamination of surface sediments have posed significant challenges to the technical and regulatory communities. In recent years, mixed or hybrid remedies that employ a combination of removal, capping, in situ treatment, and natural recovery have become more common. While mixed remedies have the potential to improve the prospects for long-term risk reduction, the high economic, social and environmental costs of sediment remediation pose serious challenges to the practically, implementability, and sustainability of sediment remediation. More innovative technologies and practices that target the use of minimal levels of in situ treatment and capping, combined with natural recovery processes, present the most efficient and effective approach to managing the risks posed by contaminated sediments.