This circular provides United States Army Corps of Engineers (USACE) guidance
for incorporating the direct and indirect physical effects of projected future sea-level change in
managing, planning, engineering, designing, constructing, operating, and maintaining USACE
projects and systems of projects. Recent climate research by the Intergovernmental Panel on
Climate Change (IPCC) predicts continued or accelerated global warming for the 21st Century
and possibly beyond, which will cause a continued or accelerated rise in global mean sea-level.
Impacts to coastal and estuarine zones caused by sea-level change must be considered in all
phases of Civil Works programs.