Hello mark,

01 May 19 18:38 at you wrote to me:

 ml> sounds like concrete bases insulate fairly well... at least if the
 ml> metal is completely encased in concrete... can't tell unless you get
 ml> it all up out of the ground and look at the bottom to see if there's
 ml> any metal from the "antenna" exposed...

This was an old steel bridge bolted, literally, to the cement foundations in 
the soil on either side.  So what you're saying is probably quite true.  It's 
been many years now and I forget all of the details.

Later,
Sean

... Incoming fire has the right of way.
--- GoldED+/LNX 1.1.5-b20180707