JB Plain, between Dinner Plain and Mt Hotham, is named after a pioneering stockmen, Jim Brown, who carved his initials in a tree on this plain. He, along with John Wells, were stockmen for George Gray of the Pelican Lagoon, near Wangaratta. Brown and Wells were sent to find greener pastures following several years of drought. They crossed the Alps and found the Cobungra region, taking Gray's cattle there in 1851. What was known as JB Plain Hut Number One was reputedly built in 1934 by Cobungra Station stockmen when the station was leased by Edward Naughton. It was used during their annual musters. The site of this early hut is reputedly about 300m to the south of the existing hut. The present hut is thought to have been was moved here in the 1960s or 70s, when the area was leased by Don Richardson, for cattle mustering by Cobungra Station & local Scouts and Venturers. It was apparently an unused SEC hut from Swifts Creek, plus extra materials from a second hut at Ensay. Once fitted out it provided comfortable accommodation for musters, and later skiers and walkers. The Kosciuszko Huts Association website states that it was built in 1978. The remains of the orginal now dilapidated hut were removed in 1989. Old cattleyards, made from the timber of fallen snow gums, are an indication of the long history of summer cattle grazing in the area. The building is about 9m square with unusual vertical weather boards with the guttering under the eaves, so that the snow won't pull them off.

Being in a harsh environment, the hut needs quite a lot of maintenance. It is maintained by VHCHA volunteers in cooperation with Parks Victoria.

We ask, as with all the huts, that if you visit and use this hut, you respect the work put in by our volunteers. Leave it clean and tidy, be careful with fires, and close all doors and windows when departing.