Frontier occupies 2,200 hopper car spots.

Major Relationships with major railroads

- Burlington Northern Santa Fe (BNSF)

- Palmetto Railways 

- Port Terminal Railroad Association (PTRA)

- Union Pacific Railroad (UPRR)

Terminals:

Barbour's Cut Loop - 520 railcar spots

Charleston Metro - 125 railcar spots

Deer Park - 250 railcar spots

Fort Worth - 240 railcar spots

Port Crossing - 1000 railcar spots

Tiger - 65 railcar spots