canaljunky Posted March 3, 2017 Report Share Posted March 3, 2017 Thought you might like to see this short vid of us passing under a roving bridge - gives a good idea of how a roving bridge works. This is Milford Bridge - Bridge 105 on the Staffs & Worcs. ("Mind your head, woman!!") Link to comment Share on other sites More sharing options...
8 Hairy Feet Posted March 3, 2017 Report Share Posted March 3, 2017 Oh I call it a changeline bridge i didn't know it had another name Link to comment Share on other sites More sharing options...
Martin Megson Posted March 3, 2017 Report Share Posted March 3, 2017 They're slso know as a turnover bridge. Link to comment Share on other sites More sharing options...
larryjc Posted March 3, 2017 Report Share Posted March 3, 2017 I thought they wre 'snake' bridges - lots on the Macclesfield. Link to comment Share on other sites More sharing options...
canaljunky Posted March 3, 2017 Author Report Share Posted March 3, 2017 You are all correct - roving bridges are also known as changeline bridges and turnover bridges and snake bridges. Link to comment Share on other sites More sharing options...
BEngo Posted March 3, 2017 Report Share Posted March 3, 2017 (edited) But not all roving bridges are turnover brideges ( think junctions) nor are all turnover bridges snake bridges (the Southern GU frinstance). The OP bridge is all three though. PS. A snake bridge can't be a changeline bridge either because they were built that way so there was no need to do anything with the line N Edited March 3, 2017 by BEngo add PS Link to comment Share on other sites More sharing options...
Debby Posted March 3, 2017 Report Share Posted March 3, 2017 (edited) 1 hour ago, canaljunky said: You are all correct - roving bridges are also known as changeline bridges and turnover bridges and snake bridges. We call them twirly bridges. Edited March 3, 2017 by DaveandDebby Link to comment Share on other sites More sharing options...
mross Posted March 3, 2017 Report Share Posted March 3, 2017 Where's the oss? 1 Link to comment Share on other sites More sharing options...
rusty69 Posted March 3, 2017 Report Share Posted March 3, 2017 (edited) 15 minutes ago, mross said: Where's the oss? Just after the mr Edited March 3, 2017 by rusty69 2 Link to comment Share on other sites More sharing options...
Pluto Posted March 3, 2017 Report Share Posted March 3, 2017 As canals are often/usually built along a hillside, the towpath is usually on the 'lower' side of a canal, looking in cross section. So that when crossing the watershed, the towpath will usually change from one side of the canal to the other, and changeline/turnover bridges often mark where a canal is crossing a watershed. Between East Marton and Barrowford, the L&LC crosses from the Aire into the Ribble, then back into the Aire and then back again into the Ribble watershed, so there are two changeline bridges, below Greenberfield and at Barnoldswick, with Foulridge Tunnel acting as the third. Link to comment Share on other sites More sharing options...
Machpoint005 Posted March 3, 2017 Report Share Posted March 3, 2017 Doesn't apply to the snake bridges on the Macc, as the cut doesn't cross a summit! The northern half of it is the summit level. Link to comment Share on other sites More sharing options...
8 Hairy Feet Posted March 3, 2017 Report Share Posted March 3, 2017 39 minutes ago, Pluto said: As canals are often/usually built along a hillside, the towpath is usually on the 'lower' side of a canal, looking in cross section. So that when crossing the watershed, the towpath will usually change from one side of the canal to the other, and changeline/turnover bridges often mark where a canal is crossing a watershed. Between East Marton and Barrowford, the L&LC crosses from the Aire into the Ribble, then back into the Aire and then back again into the Ribble watershed, so there are two changeline bridges, below Greenberfield and at Barnoldswick, with Foulridge Tunnel acting as the third. That's really interesting,thank you . Link to comment Share on other sites More sharing options...
ditchcrawler Posted March 3, 2017 Report Share Posted March 3, 2017 3 hours ago, canaljunky said: Thought you might like to see this short vid of us passing under a roving bridge - gives a good idea of how a roving bridge works. This is Milford Bridge - Bridge 105 on the Staffs & Worcs. ("Mind your head, woman!!") I was expecting to see a horse drawn boat with the horse going first uner the bridge and then crossing the canal. Link to comment Share on other sites More sharing options...
cuthound Posted March 3, 2017 Report Share Posted March 3, 2017 1 hour ago, ditchcrawler said: I was expecting to see a horse drawn boat with the horse going first uner the bridge and then crossing the canal. Perhaps it was moving so fast that you missed it? Link to comment Share on other sites More sharing options...
ditchcrawler Posted March 3, 2017 Report Share Posted March 3, 2017 (edited) 20 minutes ago, cuthound said: Perhaps it was moving so fast that you missed it? I must have. Edit Watched again and still didn't spot it Edited March 3, 2017 by ditchcrawler Add comment Link to comment Share on other sites More sharing options...
Drayke Posted March 3, 2017 Report Share Posted March 3, 2017 I was expecting the bridge to bump into the boat. Link to comment Share on other sites More sharing options...
cuthound Posted March 3, 2017 Report Share Posted March 3, 2017 11 minutes ago, ditchcrawler said: I must have. Edit Watched again and still didn't spot it Could it have been being towed by Pegasus? That would explain why we can't see it. Link to comment Share on other sites More sharing options...
magpie patrick Posted March 3, 2017 Report Share Posted March 3, 2017 2 hours ago, Machpoint005 said: Doesn't apply to the snake bridges on the Macc, as the cut doesn't cross a summit! The northern half of it is the summit level. Yes and no: Pluto was referring to watersheds rather than summits and canals cross minor watersheds quite a lot. As canals are often on sidelong ground can mean the slope being traversed is reversed. That said I don't think that applies on the Macclesfield Link to comment Share on other sites More sharing options...
system 4-50 Posted March 3, 2017 Report Share Posted March 3, 2017 This video shows a bridge. It does not show how it works, it just shows a bridge. I also was expecting a horse. Link to comment Share on other sites More sharing options...
Pluto Posted March 4, 2017 Report Share Posted March 4, 2017 I did suggest that there were other reasons for having changeline bridges, but the canal crossing a watershed is not a reason usually considered, despite it being a major factor in determining their use. Other reasons could include the demands of landowners. The L&LC line at Church was changed after agreement with the Petre family at Dunkenhalgh, who insisted that the towpath be on the opposite side to their house to reduce the possibility of poaching etc on their lands. However, the towpath was almost always placed on the 'lower' side of the canal as this kept the land required to a minimum, with the towpath sitting on top of the embankment which retained the water, rather than on additional undisturbed land on the 'upper' side of the canal which would have required purchasing. On long levels, they may have been used to allow some respite for the horse, the load being transferred to the opposite shoulder when the towpath changed sides. Their use on the Macclesfield may also have arisen from this requirement as it is a comparatively late canal, and by the time it was built, the problems in operating with horses, and the associated economics, may have been better understood than on the first generation of canals. Link to comment Share on other sites More sharing options...
WotEver Posted March 4, 2017 Report Share Posted March 4, 2017 When I saw the title I thought it was going to be a bridge taking itself for a walk down the cut. Similar to the Hogwarts staircases. Link to comment Share on other sites More sharing options...
Ray T Posted March 4, 2017 Report Share Posted March 4, 2017 (edited) 14 hours ago, system 4-50 said: This video shows a bridge. It does not show how it works, it just shows a bridge. I also was expecting a horse. "A horse! a horse! My Kingdom for a horse!" Or this bridge has been "turned over" and has horses in it. Edited March 4, 2017 by Ray T Link to comment Share on other sites More sharing options...
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