Section 111 of the 1968 River and Harbor Act provides authority for the Corps of Engineers to develop and construct projects for prevention or mitigation of damages caused by a Federal navigation project. This applies to both publicly and privately owned shorelines located along the coastal shorelines of the United States. Each project is limited to a Federal cost of not more than $12.5 million.  Mitigation efforts of shore damage caused by riverbank erosion or vessel-generated wave wash do not qualify under this authority. 

Sample Letter of Intent for Section 111 - Mitigation of Shoreline Erosion Damage caused by Federal Navigation Works