MLT and NGVD Difference 



The differences between the mlt datum and NGVD 29 are listed in 

 Table 1, as provided by personnel of CESWG. Many of these differences 

 were determined in the 1960s and 1970s. 



Table 1 



Elevation Difference Between mlt and NGVD 29 



Water Body 



Reach 



mlt as Feet Below 

 NGVD 29 



GIWW-Main Channel 



Port Arthur - High Island 



1.1 



GIWW-Main Channel 



High Island - Bolivar 



0.5 



GIWW-Main Channel 



Galveston - Matagorda 



1.4 



GIWW-Main Channel 



Matagorda - Port Mansfield 



1.0 



GIWW-Main Channel 



Port Mansfield - Port Isabel 



0.9 



Sabine Neches Waterway 



Sabine - Orange 



0.8 



Houston Ship Channel 



Bolivar - Lynchburg 



1.4 



Houston Ship Channel 



Lynchburg - Main Street 



1.1 



Cedar Bayou 



Cedar Bayou Channel 



1.4 



Trinity River 



Trinity River Channel 



1.0 | 



Ear Creek 



Ear Creek Channel 



1.3 



Dickinson Bayou 



Dickinson Bayou Channel 



1.4 



Galveston Bay 



Galveston Harbor - Texas City Chnl. 



1.4 



Chocolate Bayou 



Chocolate Bayou Channel 



1.4 



Bastrop Bayou 



Bastrop Bayou Channel 



1.4 



Freeport Harbor 



Freeport Harbor 



1.4 



Brazos River - Colorado River 



Brazos River Floodgates - Colorado River 

 Locks 



1.4 



Palacious - La Quinta Channel 



Palacious - La Quinta 



1-0 



Brazos Island Harbor 



Brazos Island Harbor - Brownsville 



0.9 



Port Isabel 



Port Isabel 



0.9 



Chapter 3 Present Networks Along the Texas Coast 



27 



