Macgill

Dug a 130cm pit and did a column test. Small collapse at 10cm on 4tap. Then another small one on 6 at 25cm. No other reactions till I prayed the column off it came off as a block down 120cm. Air temp was -10 in the sun surface snow -8. 6cm down it was -6 Noticed isolated areas of large 2+cm frost on the surface.