For half a century after the Welsh migration , the foundations of what today are the cities of Puerto Madryn at Bahía Nueva , Rawson , Gaiman , Trelew to Dolavon in the Chubut river valley and Trevelin in Valle Hermoso ( Cwm Hyfryd ) in the Andes , were laid .
Colonia Galesa-x waranq kimsaqalq patak suxta tunka phisqan ( 1865 ) maran utt ’ asi , kunapachati patak phisqa tunka Gales markat mayj mayja chaqanakat jaqinakax mä warku ( barco ) Mimosa sutinin jutantapxana , Argentina markan aynachtuqina , Chubut uma jawirjan qamañataki .