; (B) by redesignating paragraphs (3) through (5) as paragraphs (4) through (6), respectively; and (C) by inserting after paragraph (2) the following: (3) Protective features (A) In general The cost of an improvement that is part of a project under this section shall be an eligible expense under this section if the improvement is a protective feature that is economically justified to mitigate the risk of recurring damage or the cost of future repair from extreme weather, flooding, and other natural disasters. (B) Protective features described A protective feature referred to in subparagraph (A) may include— (i) raising roadway grades; (ii) relocating roadways in a floodplain to higher ground above projected flood elevation levels or away from slide prone areas; (iii) stabilizing slide areas; (iv) stabilizing slopes; (v) installing riprap; (vi) lengthening or raising bridges to increase waterway openings; (vii) deepening channels to prevent flooding; (viii) increasing the size or number of drainage structures; (ix) replacing culverts with bridges or upsizing culverts; (x) repairing or maintaining tide gates; (xi) installing seismic retrofits on bridges; (xii) adding scour protection at bridges; (xiii) adding spur dikes; (xiv) the use of natural infrastructure to mitigate the risk of recurring damage or the cost of future repair from extreme weather, flooding, and other natural disasters; and (xv) any other features that mitigate the risk of recurring damage or the cost of future repair as a result of extreme weather, flooding, and other natural disasters, as determined by the Secretary. .