▁using ▁ke el bo ats ▁similar ▁to ▁those ▁used ▁by ▁Lewis ▁and ▁Clark ▁a ▁few ▁years ▁earlier , ▁which ▁were ▁power ed ▁mainly ▁by ▁men ▁row ing , ▁pol ing ▁or ▁to wing ▁up river ▁with ▁ro pes . ▁ ▁Aut umn ▁ 1 8 1 9 ▁The ▁expedition ▁left ▁the ▁mouth ▁of ▁the ▁Kansas ▁River ▁on ▁August ▁ 1 3 , ▁ 1 8 1 9 ▁and ▁arrived ▁at ▁the ▁mouth ▁of ▁the ▁Grand ▁Nem aha ▁River ▁two ▁weeks ▁later . ▁On ▁September ▁ 1 7 , ▁the ▁steam bo at ▁Western ▁Engine er ▁arrived ▁at ▁Fort ▁Lisa , ▁a ▁trad ing ▁post ▁belonging ▁to ▁William ▁Clark ' s ▁Missouri ▁Fur ▁Company . ▁This ▁was ▁on ▁the ▁west ▁side ▁of ▁the ▁river , ▁about ▁ 2 0 ▁miles ▁north ▁of ▁today ' s ▁Council ▁Bl uff s , ▁Iowa . ▁" The ▁Council ▁Bl uff s " ▁was ▁at ▁that ▁time ▁the ▁generic ▁name ▁for ▁the ▁land ▁on ▁both ▁sides ▁of ▁the ▁Missouri ▁River ▁up stream ▁of ▁the ▁mouth ▁of ▁the ▁Pl atte ▁River , ▁and ▁Fort ▁Lisa ▁was ▁located ▁" at ▁a ▁point ▁between ▁five ▁and ▁six ▁miles ▁below ▁the ▁original ▁Council ▁Bl uff ▁- ▁where ▁Lewis ▁and ▁Clark ▁had ▁a ▁council ▁with ▁the ▁Missouri ▁and ▁O to e ▁Indians , ▁August ▁ 3 , ▁ 1 8 0 4 , ▁and ▁now ▁the ▁site ▁of ▁the ▁town ▁of ▁Fort ▁Cal h oun ... ". ▁ ▁At kin son ' s ▁troops ▁arrived ▁several ▁days ▁later , ▁on ▁September ▁ 2