
The Bogue Falaya River and Abita River converge at Covington, marking a significant late-1930s transport hub where waterborne trade met the Gulf Mobile and Northern railroad. This survey illustrates the transition from river navigation to terrestrial infrastructure, noting the Head of Navigation points while tracing an Old Grade and a new Grade Under Construction near Madisonville.
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1891 · Spanish Fort
USGS Topo · 1:62,500
1892 · Chef Menteur
USGS Topo · 1:62,500
1892 · Bonnet Carre
USGS Topo · 1:62,500
1935 · Slidell
USGS Topo · 1:62,500
1935 · Covington
USGS Topo · 1:62,500
1935 · Ponchatoula
USGS Topo · 1:62,500
1936 · South Point
USGS Topo · 1:31,680
1936 · Bonnet Carre
USGS Topo · 1:62,500
1936 · Chef Menteur
USGS Topo · 1:62,500
1936 · Spanish Fort
USGS Topo · 1:62,500