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Landfill over creek.

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alexalvarz

Civil/Environmental
May 21, 2009
1
Hey, I am here seeking your wise advice and thoughts on the following situation:
I own 2 small hills that are divided by a creek and i have been offered to canalize the creek with some sort of tubes, and fill in the gap between the 2 hills with land.
Here is a diagram of what it would look like:

I would appreciate your thoughts on the pros and cons of carrying out this procedure, and would you advise to follow through with it?

Thank you.
 
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Depending on where you are, the permitting issues may be quite difficult. You should take a look at what agencies have jurisdiction over the project to get a feel for how much the lawyers are going to cost you.

Would you develop the land for residential? Commercial?
 
Do you know the peak flow in the creek? If there is a storm of greater size than you used to design the culvert, where will that water go?

Richard A. Cornelius, P.E.
 
This may be my stupid question, but by "Landfill" do you mean filling the valley with reasonably clean dirt or other fill materials, or by any chance do you mean "landfill" in the context of so,me sortof scheme of municipal etc. garbage/trash disposal? (If the latter, and you can get someone to tell you this is a good idea, it would probably be good to have dependable pipes and joints if you want any reasonably clean water that goes in to be about like that when it goes out!)
Have a good weekend.
 
The pros are you'd get flat land.

The cons are, you'd have to hire an engineer, get fill dirt, monitor the placement of the fill dirt to make sure it's properly compacted, size the pipe correctly, get a good contractor, get local permitting, get state permitting, get federal permitting (i.e., U. S. Corps of Engineers). You'd also have to do an environmental assessment of the stream classification and riparian buffer. The federal permit may require that you protect any version of endangered species (flora or fauna0 and any architectural or archelogical features on the entire property (i.e., not just where the impact is occuring. You'd also have to justify the need for the impact and present all options you have previously considered and ruled out. Cost for wetland mitigation can vary widely, but $60,000/acre is a ball park. Bearing in mind that for every one-half acre you impact you have to mitigate for twice that amount. If the stream is under the jurisdiction of state or federal water designation, you'd also likely have a separate mitigation plan for the stream impact. We're seeing $400 to $500/lf for stream impacts.

Wish this was easier, but it's not.

f-d

¡papá gordo ain’t no madre flaca!
 
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