▁is ▁now ▁found ▁in ▁the ▁Dev ils ▁River . ▁ ▁The ▁Dev ils ▁River ▁is ▁part ▁of ▁the ▁West ▁T win ▁River ▁waters hed . ▁ ▁The ▁West ▁T win ▁River ▁waters hed ▁is ▁itself ▁one ▁of ▁seven ▁waters h eds ▁contrib uting ▁to ▁the ▁T win - Do or - K ew a une e ▁River ▁Bas in , ▁which ▁em pt ies ▁into ▁Lake ▁Michigan . ▁ ▁History ▁of ▁the ▁area ▁ ▁A ▁major ▁Native ▁American ▁trail ▁used ▁to ▁cross ▁the ▁Dev ils ▁River ▁near ▁Cher ney ▁Mar ib el ▁C aves ▁County ▁Park ▁in ▁Man it ow oc ▁County . ▁White ▁sett lers ▁later ▁used ▁the ▁same ▁trail ▁to ▁access ▁and ▁travel ▁across ▁the ▁country . ▁In ▁ 1 8 4 0 , ▁U . S . ▁Army ▁Captain ▁Thomas ▁Jefferson ▁C ram ▁survey ed ▁much ▁of ▁the ▁area , ▁and ▁successfully ▁proposed ▁construction ▁of ▁a ▁military ▁road ▁from ▁Fort ▁D ear born ▁( now ▁the ▁city ▁of ▁Chicago ) ▁to ▁Fort ▁Howard ▁( now ▁the ▁city ▁of ▁Green ▁Bay , ▁Wisconsin ). ▁ ▁In ▁ 1 8 4 7 , ▁invest or ▁P line y ▁Pier ce ▁built ▁Rock ▁Mill ▁on ▁the ▁Dev ils ▁River , ▁a ▁site ▁now ▁listed ▁on ▁the ▁National ▁Register ▁of ▁Historic ▁Places . ▁It ▁is ▁one ▁of ▁the ▁oldest ▁structures ▁in ▁Man it ow oc ▁County . ▁ ▁In ▁ 2 0 0 5 , ▁the ▁Central ▁Brown ▁County ▁Water ▁Author ity ▁proposed ▁removing ▁the ▁remaining ▁stone ▁ab ut ments ▁of ▁two ▁brid ges