[AT] Shale or gravel?

[carl gogol]

Mike thanks for the comments.  Run of Bank is what comes out a gravelpit and 
includes a few stones up to 6" or even 8" in extent.  In NY it is 
abbreviated ROB on construction drawings.  Normally, the final 6" of a road 
bed are screened to exclude anything over 2.5".  Gravel beds are 
periodically graded and tested for proper percentages of various size 
aggregate and if found to be desirable are "NYS DOT approved" by the testing 
lab.  To be approve, the material may have to be screened and will cost 
about $2 more.  The bed, or pit this gravel would come from is approved.
Gravel will pack well, yet continue to drain until a lot of fines pack the 
pores.  I wonder if organic matter will clog  too, or will it decompose and 
clear as new stuff replaces it.  I know the graveled areas of our old 
barnyard were a lot more pleasant than the dirt areas slightly further from 
the barn.
Carl Gogol
Manlius, NY
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