we did a series of projects on these in eastern germany, where they are called "Knueppeldamme" & tend to date from the middle ages onwards (check out the "sweet track" or "flag fen" in england for older wooden pathways)
there might be something on them if you google "baruth", a town where preservation was particularly good
the town where i worked on them just had to pay archaeologists to monitor all work done in the area
if you can convince the contractors to save a pile of money by not disturbing them, then all power to you
otherwise: document a good sample, and monitor the rest, so you at least know exactly where it was & any relevent details on how it was built, how the logs were cut, what kinds of trees were used, any kinds of repairs done, signs of wear, stray artifacts; take dendro samples, etc.

"Patch, Shawn" <[log in to unmask]> schrieb:
> Hello all,
> 
>  
> 
> I have a few questions regarding corduroy roads and thought folks on
> this list might be able to offer some insight or suggestions. I was
> recently made aware of an intact corduroy road buried (4-5') under an
> existing section of highway that is currently under construction. It was
> identified by materials engineers while conducting small tests and is
> reported to be well preserved with layers of rough logs set with sand.
> The intact segment is located in a marsh setting and is approximately .5
> mile long, most of which appears to be in good condition. Because this
> project is under construction we are treating it as a discovery and need
> to move forward with an evaluation and treatment before it is removed by
> the contractor (which is going to happen).
> 
>  
> 
> Here are my questions:
> 
>  
> 
> Do any of you have any experience with this type of resource from an
> archaeological perspective? If so, what did you do? How did you evaluate
> and document the resource? Beyond detailed drawings and photographs,
> what else can/should we consider?
> 
>  
> 
> Any help or advice would be sincerely appreciated.
> 
>  
> 
> Thanks,
> 
> Shawn
> 
>  
> 
> Shawn Patch
> 
> Archaeologist
> 
> Georgia Department of Transportation
> 
> 3993 Aviation Circle
> 
> Atlanta, GA 30336
> 
> (404) 699-4420
> 
>  
>