The JGRLS also has the following floodplain documents on file and available to the public:
https://msc.fema.gov/portal/search?AddressQuery=Jackson%20County%2C%20ms#searchresultsanchor
http://Mitigation of Flood and Erosion Damage to Residential Buildings in Coastal Areas, FEMA 257
Engineering Principles and Practices
Protecting Building Utility Systems From Flood Damage