Graphical Glitch (Black Gap) in Broken Bridge

I came across this odd glitch in The Broken Bridge, the landscape is scaled upwards, but there isn't an incline, only a direct level upwards with a large black gap between layers. You're able to walk on the higher ground, no issue there, just a small graphical glitch.



I use Windows 7 64 bit, 4gb ram, and an amd radeon hd 6800 series GPU.