Ralph Hawkins, a former resident of Covington, now oversees the "HawkinsRails.net" train photo scrapbook, with hundreds of pictures of trains, locomotives, specialty cars, and railroad information, including maps.
Here's a link to his page on the history of the New Orleans Great Northern Railroad, which was called "The Ozone Route" because it passed through portions of St. Tammany Parish.
Click on the link below:
https://hawkinsrails.net/steam/nogn/nogn_steam.htm
Many of the photographs on the Hawkinsrails.net website were contributed by Matt Hardey of Covington, who has quite a collection of railroad pictures of his own.
See also: