Abstract: The purpose of this report is to recommend a framework for developing a comprehensive database of US Army Corps of Engineers’ (USACE) natural infrastructure (NI) projects. Natural infrastructure is defined as an area or system that is naturally occurring, naturalized, or constructed to mimic naturally occurring features and then intentionally managed to enhance ecosystem value and provide social and economic benefits. Examples include river floodplains, setback levees, forested water supply watersheds, freshwater and coastal wetlands, living shorelines, dune and beach systems, living breakwaters, and reefs. NI is dynamic, with landscape-level interactions occurring among different features as well as in tandem with conventional infrastructure. Specifically, we identify the Engineering With Nature (EWN) ProMap database is identified as an attractive candidate for expansion. We also develop a tool for collecting project data that will improve data quality by standardizing information across projects, adopting an ecosystem services approach to cataloging project benefits, and incorporating social benefits metrics.