SJ8698 : Roving bridge at Lock No.7 (1)
taken 11 years ago, near to Droylsden, Tameside, England
The Ashton Canal runs eastwards from Manchester to Ashton under Lyne. It links the Huddersfield Narrow Canal and Peak Forest Canal with the Rochdale Canal and Bridgewater Canal and forms part of the "Cheshire Ring".
The original scheme was completed in 1796, running from a large basin behind what is now Piccadilly Station in Manchester, climbing gradually eastwards via 18 locks to Fairfield, Droylsden. From there one level section continued eastward to Whitelands Basin, Ashton under Lyne, while another arm headed north through what is now Daisy Nook, climbing another eight locks to Hollinwood, with a branch running east from Daisy Nook towards Park Bridge. A short arm from Portland Basin crossed the River Tame to Dukinfield. A year later an additional branch from Clayton to Stockport was opened.
The short link between Ashton Canal Basin at Piccadilly and the Rochdale Canal was not opened until 1800, when disputes about canal tolls and responsibility for paving the streets around the basins were resolved.
The Peak Forest Canal, opened in 1800, joined the Ashton Canal by way of the Dukinfield spur across the aqueduct over the Tame at Portland Basin.
The Hollinwood Branch Canal closed in sections between 1932 and 1961. The Stockport Branch Canal was closed in 1962.
History: Link
Listed buildings and structures are officially designated as being of special architectural, historical or cultural significance. There are over half a million listed structures in the United Kingdom, covered by around 375,000 listings.
Listed status is more commonly associated with buildings or groups of buildings, however it can cover many other structures, including bridges, headstones, steps, ponds, monuments, walls, phone boxes, wrecks, parks, and heritage sites, and in more recent times a road crossing (Abbey Road) and graffiti art (Banksy 'Spy-booth') have been included.
In England and Wales there are three main listing designations;
Grade I (2.5%) - exceptional interest, sometimes considered to be internationally important.
Grade II* (5.5%) - particularly important buildings of more than special interest.
Grade II (92%) - nationally important and of special interest.
There are also locally listed structures (at the discretion of local authorities) using A, B and C designations.
In Scotland three classifications are also used but the criteria are different. There are around 47,500 Listed buildings.
Category A (8%)- generally equivalent to Grade I and II* in England and Wales
Category B (51%)- this appears generally to cover the ground of Grade II, recognising national importance.
Category C (41%)- buildings of local importance, probably with some overlap with English Grade II.
In Northern Ireland the criteria are similar to Scotland, but the classifications are:
Grade A (2.3%)
Grade B+ (4.7%)
Grade B (93%)
Read more at Wikipedia Link