English Heritage seem particularly undecided on the date of this one, saying probably post-Roman through to possibly as late as 7th century but on the other hand maybe Iron Age or even Bronze Age. So could be anything really.
I wonder if there is a clue in where the northeastern end of the earthwork leads to. As I was driving north away from the site I noticed some strange bumps and small hills to the east just after the two roads join and assumed they were quarry spoil heaps. Checking the maps and internet later I found out these are a natural feature known as Canyards Hills and that Natural England calls them "the most impressive example of 'tumbled ground' in England and Wales" Is it significant that Bar Dyke leads to, or from these hills?
I can't work out any use for this site. What could it possibly be for. The right hand side (from the north) is used as a car-port by Netherlanders (no offence intended but it was today). It would have been a formidable defence against attackers from the south
An earthwork of an unknown date.
The section of the dyke sandwiched between the roads is the most impressive part.
There is an area called Smallfield 200m or so Southeast; a Bronze age/Romano-British Field system.
The whole has been badly disturbed by roads and walls, there is a rubble ring of a possible robbed cairn (Bar Dyke Ring )but it's hard to pick out amongst the heather and a fence and track cut through it.
Worth a look if your between Ash Cabin and the circle at Ewden Beck.
"Bar-dike, which is now the boundary between Broomhead-moor and Smallfield-common, Mr. [Reverand John] Watson conceived to be a British work. It is an immense trench. He further conceived that here the Britons may have made a stand against a body of forces coming from the side of Bradfield, and that their chief being slain in the encounter was buried under that vast carnedde on that part of Broomhead-moor which is known by the name of Roman Slack, and which is by the common people called the 'The apron full of stones.' The name of Roman Slack in Mr. Watson's opinion points out who were the party against whom the Britons were contending, though in what particular expedition he pretends not to say."
from 'Hallamshire', Hunter, J., 1819 ('Hunter's Hallamshire')
This Bronze Age field system/settlement is worth a look if you're in the area.
Covering around 900 square metres there is plenty to see in the form of field boundaries, cairns and an enclosure containing some kinda 3/4 stone alignment.
March 2004 when I visited the remains were pretty clear of heather and moorland grass; wouldn't know if that's the case now.
Follow the track to the SE from the Bar Dyke, SK246946, for about a quarter of a mile until you are directly above the Agden Side Road.
I had a root round for this one but there's not much to see (assuming that the site is accurately marked on the OS 1:25000 map) There does seem to be a semi-circular feature to the west of the fence that it evident by the growth of heather more than anything else and a slight change in the vegetation to the north and south where the track beside the fence passes through the cairn. Might be worth a look for the bank in winter.