The LaFarge test site is a little 'moon on earth'. It is undistinguished as a vast stockpile of a slag byproduct from steel-making. It is unique because LaFarge management supports our experimentation with heavy equipment, access and finely ground materials
that simulate regolith. Site terrain varies from trivial to profoundly difficult. LeFarge is a worldwide supplier of construction materials and aggregates. We are blessed by LaFarge's generosity.

From AstroboticBlogPhotos