| | Quote: | | | Posted by elizabeth villa | | | |
| hi bong...thanks for the reply...just to let you know, the tunnel we're clearing (not digging or breaking rocks) is manmade. all we've been doing is clearing the tunnel from clayish soil with small broken fossilized coral. the tunnel has rock walls, some made as stepping stones for use to go down.
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Hi Beth ~ Backfill is good! As are tunnels with stepping stones!
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