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The Norfolk Broads Forum / General Chat / Bridge heights
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Posted By Discussion Topic: Bridge heights

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wheelrepairit
Jun-22-2005 @ 1:59 PM                           Permalink
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hi, boat is moored in Horning and im keen to find out where abouts i can go on the rivers, is there any one place/site that has all the bridge heights listed.

My boat is 7ft 10 inches high, guess thats potter bridge out of reach, not sure about others.

thanks folks

pete

Captain-Joshie
Jun-22-2005 @ 2:05 PM                           Permalink
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Hi Wheelrepairit

A big welcome to the site, hope you have a fun time here.
Do you have a private boat, if so what type? We are moored at Ranworth so I expect we will see each other out on the water.

I use Paul's website as my reference site for info such as bridge heights and tides, take a look it is very comprehensive.

http://www.shorebase.co.uk/broads/broadsdownloads.asp

John

This message was edited by Captain-Joshie on Jun-22-05 @ 1:08 PM

Paul
Jun-22-2005 @ 2:24 PM                           Permalink
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I appreciate the kind link John, but for bridge heights, the NSBA page at http://www.thegreenbook.org.uk/home/bridges.asp gives a pictorial online reference (and is also in their annual Greenbooks).

(Pete, Wroxham & Potter are out, but you should be OK for Ludham and Acle and most of the others, subject to Tide height.   Smile

edit: Wayford's out as well I'm afraid...

This message was edited by Paul on Jun-22-05 @ 1:29 PM

brasingamen
Jun-22-2005 @ 2:40 PM                           Permalink
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WWW.broadsnet.co.uk is also a good site.

However, I've not seen any info on bridge heights at average low tide.
Finding heights at average high tide is easy, but how do you know whether or not your boat will go through at low tide?
eg My hire boat is 7 feet. Wroxham bridge is 7'3' at average high tide. I know I can get through coz the yard has told me.
It would be nice to have info on the difference between high and low tides throughout the broads, then us newbies can plan better and time our bridge navigations more easily. I know for instance that at Yarmouth there is a rise and fall of around 7 feet, but what is it at wroxham?

Also Pete:
You may already have one, but a map that has a chart displaying cruising times is useful. If you're planning a cruise that takes 3hrs for example, you might need to know what time to set-off in order to navigate certain bridges according to tides. Ithink you can get one from the member gear on this site. Is that right folks?

Happy cruising,
Mike      
    

billmaxted
Jun-22-2005 @ 3:01 PM                           Permalink
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Just getting a tad worried about this one Question the time and height of predicted water at average low tide at the bar bears only a pssing resemblance to what actually occurs at most of broadland's bridges quite often by as much as 18 inches. amounts of land water, wind direction and baromatic pressure over the north sea all having their effect. Hamiltons and others give a very rough guide of the knock effect up stream but, no-one I suspect can give the kind of certain reply that is being sought. It is only by direct observation at the time against the prediction that you get any idea of what might happen.

Well you said, "Aim for the green post!" Bill...

brasingamen
Jun-22-2005 @ 3:26 PM                           Permalink
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Thanks for putting me straight on this one Bill. I didn't want to mislead anyone.
You're of course dead right and it couldn't be emphasised enough about the "direct observation at the time".

I merely wanted to point out that for planning purposes a guide and I mean GUIDE, would be useful. Not one to be used as an assumption that you will clear the bridge!

Cheers,
Mike    

billmaxted
Jun-22-2005 @ 5:34 PM                           Permalink
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Any of the old What to do on the Norfolk Broads or I think it's successor and as far as I remember Hamilton's Guides will show rough figures for rise and fall around the broads by chosing Acle Reedham, Wroxham Potter ect. You can get a very rough idea, but that is going to be an average between Springs and Neaps. Given that some bridges are located at positions where the tide has more influence than others in relation to other factors however........

Isn't it sometimes just fun to see if you can make it? Important when buying to ensure you are not barred from getting to your mooring but often there will be times when all sorts or boats might squeeze under. Also bear in mind that the out of water profile of the boat is the limiting factor for Potter and Wroxham bridges i.e. the height and width of the cabin corners is what get's you stuck.  Evil Grin

Well you said, "Aim for the green post!" Bill...

Boatboy
Jun-22-2005 @ 5:59 PM                           Permalink
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wise words as ever from Bill. I always keep an eye on the tides and mark down where slack water falls. I have rarely seen low tides earlier than predicted but it's amazing how often thay are as much as an hour and a half or two hours late.

I always find that the best check on whether you can get under a bridge or not is a visual siting along the top of the boat from the stern.

Some bridges are obviously arched, Potter, Wroxham etc but beware the Old Road Bridge at Beccles which also has a slight arch which catches out the unwary who have not checked clearance at the edges of the boat, or have tried to pass beneath it "off centre".

Sloshed
Jun-22-2005 @ 10:11 PM                           Permalink
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Is it just Potter that offers a pilot service ?

I vaugley remeber there being one at Wroxham but i may well be wrong...

Cheers.

Michael.

Champagne tastes, Beer money.

Dibbler
Jun-22-2005 @ 10:30 PM                           Permalink
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There is indeed a bridge pilot service at Wroxham, Michael...(Belaugh Boats (now Moonfleet Marine) insisted that hirers of their craft had to use the pilot service to navigate Wroxham Bridge) Don't know how much it costs these days though, there was no charge to the Belaugh Boats hirer as the company had an arrangement in place.

John

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