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Re: “Protest targets Canal Corp tree removal plan

Technical Manual for Dam Owners Effects of Plants on Earthen Dams FEMA 534 Sept 2005


"Tree and woody vegetation penetrations of. earthen dams and their appurtenances have been demonstrated to be causes of serious structural deterioration and distress that can result in failure of earthen dams."


After reading this article, my worst suspicions are confirmed. Our DAM at the Oxbow has serious potential problems.

My observations -
1. The ratio of base length to dam height should be 2:1 or 3:1, ours looks like 1:1 or less, making a very steep slope. (both sides of dam)
2. The crest is narrow.
3. I doubt there is a key trench.
4. No toe drain system
5. Slope of downside is too steep for soil compaction to be carried out.
6. Large trees present. Many cottonwoods with deep roots.
7. Poor inspection access

I loved the poem quoted in this article -
"I think I shall never see a poem lovely as a tree" by Joyce Kilmer.

The article suggests a rewrite -
"I think I shall never see, a sight so wonderful as a tree, removed from an earthen dam, whose future safety we wish to see!"

The last verse was rewritten too.
"Poems are made by fools like me, but only God can make a tree!"

I'll let you find the rewrite within the document.

0 likes, 1 dislike
Posted by Oxbow on 12/11/2017 at 8:28 AM

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