Downspout Drainage Options


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Old 11-08-10, 08:43 AM
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Downspout Drainage Options

After a fairly substantial exterior renovation, I will be having gutters installed. I would like to redirect the run-off to the street stormwater drain or directly to the creek in the backyard (where the stormwater drain leads to). The house is located at the end of a cul-de-sac on a substantial hill. The front lawn slopes down to street level while the back yard slopes (actually, a 8' drop off in some spots) to a small creek about 450' from the rear of the house. The house is 65'lx30'w. While the water does a good job of draining naturally, I have a large planting bed in the front yard adjoining the house that cannot handle the volume of water.

For the front of the house my plan , which I would appreciate some constructive input, would be to connect the downspouts to 4" HDPE all y-ed together and run down to a rock feature that drains to the stormwater drain in front. There is a sloped asphalt curb that the water would have to drain down. A more attractive way to drain the water would be great. In the rear, I would do the same but drain directly above the creek. I have broken up the front/rear in my head because installation would be easier. I have looked at storing some water in an underground tank and installing a drip system but that is a longer-term project.

The excavation and installation I can handle but I have no experience with stormwater management. What environmental effects do I need to consider? Permits required for this type of stormwater redirection? I'd appreciate any other suggestions/caveats.
 
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Old 11-08-10, 04:39 PM
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Since the slopes are already going in the direction you want, the job is easy. Use the pipe you mentioned. I can't picture the asphalt curb but you should be able to run everything under ground.
 
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Old 11-12-10, 09:50 AM
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I spent the morning cleaning the drain after taking a picture yesterday, probably shoveled 5 yds of dirt and grass out of there.. anywho..

I've thought about using a pop-up emitter to tidy up the drain area but I'm concerned about washout right by the curb. Any other suggestions on the discharge area? As a side note, the road and curb are likely to be replaced in the next 18 mo so I'd rather not be breaking up the curb to discharge on the street.
 
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Old 11-12-10, 04:55 PM
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Install a drywell about 5 feet before the curb.
 
 

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