; and (B) coastal habitat restoration work, including dune enhancement, vegetative restoration, beach renourishment, coral and oyster reef restoration, and other actions to restore the function of the natural coastal ecological function and processes to provide flood risk reduction benefits. (4) Improvements to diversion, removal, and storage infrastructure to reduce risks caused by frequent and chronic coastal flooding. (5) Innovative methods to reduce risks caused by chronic flooding along street infrastructure systems, including canal streets, absorbent streets, floodable parks, bioswales, rain gardens, permeable pavement, and underground cisterns. (6) Deployment of technologies designed to mitigate power outages, continue delivery of vital electricity services, and maintain the flow of power to facilities critical to public health, safety and welfare, including distributed generation, energy storage, and microgrids. (c) Limitation on project eligibility A project shall not be eligible for funding under this section if it will have any long-term negative impact on important ecological functions and habitat or existing natural coastal protection features and functions. (d) Priority In making grants under this section the Secretary shall give priority to the following: (1) Protecting areas designated as special flood hazard areas for purposes of the national flood insurance program under the National Flood Insurance Act of 1968 ( 42 U.S.C. 4001 et seq.) and the Flood Disaster Protection Act of 1973 ( 42 U.S.C. 4001 et seq.). (2) Projects in areas designated as such special flood hazard areas that incorporate at least 2 feet of additional freeboard, or 3 feet in the case of critical infrastructure, above base flood elevation. (3) Protecting critical infrastructure, as that term is defined in Homeland Security Presidential Directive 7 as issued December 17, 2003. (4) Projects that yield flood risk reduction benefits and additional environmental, social, and economic benefits. (e) Joint application Two or more