Bonhomie and Hattiesburg Southern

If any of you had /have the LP Steam Railroading under Thundering skies you will probably remember the one track of a Loco switching cars in the yard on the Bonhomie and Hattiesburg Southern in Mississippi. the recording is so clear you can hear the rain and accompaning thunder as if you are trackside (no added sound effects here), I have found information on the Locos but can find nothing with regards track plans etc .

DCSnr