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Approved for public release; distribution is unlimited. ERDC TN-DOER-R21 September 2013 Implementing Engineering With Nature within the Corps: A Workshop by Cynthia J. Banks, Thomas J. Fredette, Burton C. Suedel, and Todd S. Bridges PURPOSE: This document summarizes the major findings of a workshop entitled “Engineering With Nature: Designing Navigation Infrastructure for Greater Environmental Sustainability”1 held September 7-8, 2011, in Charleston, South Carolina. The goal of the workshop was to identify opportunities to advance science, engineering, and operational practice leading to expanded environmental benefits from navigation infrastructure and operations within the US Army Corps of Engineers (USACE). This was accomplished through in-depth discussions of relevant experiences, issues, and lessons learned. The workshop was sponsored by the Dredging Operations Environmental Research (DOER) Program and served as a conduit for sharing technical presentations, networking, and generating outcomes that will support the DOER program. BACKGROUND AND PROBLEM: The USACE Navigation Mission is to provide safe, reliable, efficient, effective, and environmentally sustainable waterborne transportation systems for movement of commerce, national security needs, and recreation. The challenge for the USACE is to provide an efficient, cost-effective way to achieve its missions, while simultaneously producing environmental and social benefits. USACE infrastructure and operations are currently viewed as often in conflict with environmental and social interests. The concept of Engineering With Nature (EWN) bridges two existing concepts: Working with Nature and Building with Nature. The concepts, principles, and practices associated with Working with Nature (as developed by the International Navigation Association, PIANC) and Building with Nature (as developed through a partnership between government and private sector interests in The Netherlands) support the development of navigat