Barn? Mill? Gin?

Somewhere between Black Tower and Grier, New Mexico

Tin Shack

I think this was part of the cotton gin in Causey, New Mexico.

Cotton

Cotton gin, Causey, New Mexico

People unfamiliar with the region may be surprised to find cotton growing in Eastern New Mexico and West Texas/Panhandle, but it's been a serious crop here for close to a century.
Less thirsty varieties have been developed over the years and much of the cotton produced here is done in the dryland method. Of course, drought resistant isn't drought proof and cotton suffers, just like every other crop, without water.

Parmer County Cotton Gin

Needmore Gin

Earth Gin: Earth, Texas

Tam Anne Cotton Gin