Built in the early 1980's by the NZFS. The only existing roadman huts were at Blowfly Flats, another by 'Slippery Face' (Robinson Creek) & another on the Waita Flats. Edit Hut
Following the weathered "track" sign down from the hut takes you along a permolat marked track to Lake Law. The track keeps going past here but I didn't follow it further.