TOPOGRAPHY AND SOIL CONDITIONS City of New Orleans Ground Elevationsfrom Canal Street at the Mississippi River to Lake Pontchartrain Lake Ponchartrain
30 20
A
Floodwalls along Mississippi River
A
17.5 feet
Avg. Annual Highwater 14 ft Gentilly Ridge
0
-20 Mississippi River Bank
Hurricane Protection Levee & Floodwall
New Orleans
23 feet 18 ft Project flowline
10
-10
B
SPH Design Elevation 11.5 ft Normal Lake 1.0 ft Level
30 20
B
Canal St. at River Esplanade at St Paul St. Louis Cathedral
Derbigny at I-10
Gentilly Blvd. at Allen
Dillard University Campus
10
Lake Pontchartrain
0
-10 Wainright Dr. at L.C. Simon
St. Anthony at Wildair Dr.
-20
UNO Side of Wainright Dr.
The City of New Orleans is 51% below Sea Level with a mean elevation of 5 feet above sealevel. The section above shows New Orleans in a “bowl-like� land surface indented in water with the neighboring Lake Pontchartrain and Mississippi River protected by natural levees and man made seawalls.