Rip Rap Erosion Control in Nashville, TN

[riprapper]

Have found a lot of great information on this site from engineers who have experience with water flow, erosion control, etc.

We need help installing rip rap, preferably from a barge, on a property on Old Hickory Lake in Hendersonville, TN. If anyone has recommendations or referrals, I would appreciate your help.

 

[BigInch]

What kind of help?

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http://virtualpipeline.spaces.live.com/

 

[Hoagie]

The city or county will have standards most likely. Check.

An analysis should be performed to determine what types of flow you can expect. In some cases, you may get ripping along the shore line. The velocity of the water will be one of the determining factors for some of the dimensions of the stone.

More to consider:

Top of rock should equal the historical high-high water elevation plus a freeboard dimension. I've seen 2-ft freeboard in many jurisdictions, but that's just a guess. Check with the town/county.

If your on a lake, you should consider wave/frost actions. This will have a direct affect on the stone size..allow for bouyancy;

you will need to key the riprap into the bottom of the slope; If this is underwater, then you have another set of issues.

You will need to select an appropriate cushion and slope stabilization under the riprap--this could be a stone cushion plus filter-fabric.

H.

 

[francesca]

The Nashville drainage manual is quite comprehensive and TDEC has a good EPSC manual. Both have photos and instructions for implementing lots of BMPs.

It's also worth looking into stream restoration and using natural features (like log weirs) to protect stream banks.

Oh, and Henderson Lake falls under the Nashville Corps jurisdiction so whatever you want to do there you need a Section 404 permit. If you need a PE to design this and do your permit application I know a retired Hendersonville resident with current TN PE and CPESC qualification who might be up for it.

 

[riprapper]

Thanks to everyone for valuable insight. We have reviewed specs and requirements with the Nashville Corps.

We definitely need help with the design and also with implementation (i.e. the physical delivery and laying of stone). If you know companies/individuals who can physically provide this service, please do let us know.

Thanks again.

 

[francesca]

http://licsrch.state.tn.us/default.aspx