That's more or less an outdated .grf, (i.e. I don't use it myself anymore), and it should really be removed. But apparently some people still use it...
Anyway, took a closer look at the .grf, and the only thing I can find that may cause this issue to appear is that there seems to be some missing sprites - or at least sprites that aren't filled with something. Sprites 67, 76 and 79 are empty, but I also took a closer look at the sprites provided with the TTDPBase.grf, (for TTDP), and those particular sprites are empty as well. Not sure why that is. And probably I also used any of them as model for my own replacement of foundations, resulting in that INFRA-Landscape.grf.
As far as I can tell there is one sprite missing, one of the two below actually that I just created quickly, (which one of them to be used I'm not sure of);
Attachment:
INFRA191.png [ 3.17 KiB | Viewed 6018 times ]
I don't have time to look into this any deeper, but as I've created a possible solution above, you may have the time to explore on your own?
Let me know how it goes...