Layout Construction · Model Building · Research

Ideas for the French River Bridges

As track laying progresses, I’ve run into the French River. The railway crosses the French River over a pair of low bridge spans smack in the middle of St.George yard. Oddly, this was also the case in Peterborough on the B&M where the yard tracks crossed the Nubanusit River. Unfortunately, I have no low angle photo of the actual spans. If you have a copy of Model Railroad Planning 2000, pages 58-59 show these spans from above in a beautiful Phillip R. Hastings photo. Note that one of the bridges carries a turnout and so will mine – the switch to the public delivery track.

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The railway crosses the French River on a pair of low, 3 span bridges.

Here’s are some shots of those old granite piers today.

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Center piers at Peterborough, NH
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Note the sharpened block pointing upstream.

I was out in Lyndeboro, NH on the B&M’s Hillsboro branch recently and found the bridge spanning the entrance to Pike quarry. The bridge is one lane wide, a span of maybe 12′-15′ and consists of six timbers, maybe 12″ by 12″. This would make the perfect bridge design for St.George as the spans are in the same range (14′). The granite abutments are also good inspiration for how this type of structure was constructed. Piers and abutments made from individual granite blocks cast in Durhams Water Putty will do the job.

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Bridge at entrance to Pike Quarry, Lyndeborough, NH.
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Simple, rugged construction.

Looks good to me! Let’s get started!

 

 

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