1 Min Read Share This!FacebookXPinterestLinkedInEmailLevees – Preview1 Min Read Hymelia CrevasseHymelia CrevasseThe Hymelia Crevasse of 1912. 1912, Hahnville Killona area. (Photo courtesy of the George Lorio family) Spillway OperationSpillway OperationIt works! The spillway opens in 1937. Share This!FacebookXPinterestLinkedInEmail