SELA :----- Back IENCs available S-57 Ver3.1 data exchange standard are: Lower Mississippi River, Mile 236-951 , Upper Mississippi River, Mile 0-866 Tennessee River, Mile 0-652 (Including Tellico, Hiwassee, Clinch and Emory Rivers) , Tennessee-Tombigbee Waterway, Mile 218-450 Black Warrior-Tombigbee Rivers, Mile 0-393 ,Allegheny River, Mile 0-7 , Arkansas River, Mile 0-444 , Atchafalaya River, Mile 0-118 , Cumberland River, Mile 0-381 , Green River, Mile 1 -108 , Illinois River, Mile 0-322 , Kanawha River, Mile 0-91 Monongahela River, Mile 0-128 , Ohio River, Mile 0-981 , Red River, Mile 0-237 IENCs currently available in Inland ENC 2.1 Data Standard are: Allegheny River, Mile 0-14 , Kaskaskia, Mile 2 to 36 , Missouri River, Mile 0-735 , Ouachita River, Mile 5 to 338 - IENCs currently under development are: Alabama River , White River USACE IENCs follow IHO Transfer Standard for Digital Hydrographic Data (S-57,Ver 3.1).S-57 charts are intended for deep-draft,ocean ships. IHO S-57/ENC-Object&Attribute Catalogue Inland ENC, 2.1 Product Specs.New IENCs follow & based on S-57 Standard,allows inland features[Fleeting Areas,Lock Walls,Casino Boats]encoded on ENC. Inland ENC Encoding Guide,Ed.n 1.3.1.-Maritime ENC Product Specs(Appendix B1)