US lawFederal (United States)RegulationsTitle 49 CFR — TransportationChapter I — PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATIONPart 193 — LIQUEFIED NATURAL GAS FACILITIES: FEDERAL SAFETY STANDARDSSubpart C — Design193.216149 C.F.R. § 193.2161Dikes, general.Last amended: 2016Year: 2026Length: 34 wordsOfficial source Cite as 49 C.F.R. § 193.2161 (2026)An outer wall of a component served by an impounding system may not be used as a dike unless the outer wall is constructed of concrete. [Amdt. 193-17, 65 FR 10959, Mar. 1, 2000]Previous49 C.F.R. § 193.2155Next49 C.F.R. § 193.2167