[FireBeyond]

I would expect that these runways are not high volume. Temporary/shifting/special needs.

[chowells]

This is about McMurdo. I'd be surprised if they ever had multiple flights landing at once.

[FireBeyond]

Exactly. I could see a 'convoy' of aircraft for a resupply, but I also expect even that might be just a few a day (because of weather and such, to avoid excessive aborts or returns due to weather or unloading delays).