mechackiham? is today known as The City of Gretna, the parish seat of jefferson Parish. It was incorporated into gretna in 1913. the City of gretna is made up of several small villages,Mechinacham, Gretna, Brooklyn Pasture, Mcdonoghville. You may also find It listed as New Mech. and an old mech. there is a very good book written by Dr. Mary Grace Curry about the history of Gretna and the villages that make up Gretna today it can be purchased at the Gretna museum complex on Lafayette st. in Gretna.