Considering that I'm a member here the title may not be saying much.
Maybe I'm just too close to the problem so I'll pick your minds on this.
Lake Kevin Abatement has reached Phase II. I'm making progress on the back yard flood control. I need a good way to terminate my pump discharge line at the sidewalk out front. My pump drains 5 residential lots.
What is the best long term cost effective surface discharge? I'd prefer something more attractive than the PVC pipe laying on the grass.
Idea killers:
French drain will not work. Flooded area is lower than the discharge area.
2" diameter discharge will flow so fast it will strip away vegetation and soil.
I do not have available power to add a second discharge pump at the sidewalk.
Leach field is not an option.
Dry well is not an option.
Soil expansion and contraction means lots of ground movement.
Here's the current setup:
43 gallon per minute pump with two inch discharge pipe.
Pump is on the back wall of the shop.
Pump discharge pipe lays on the surface.
2" PVC pipe makes the corner at the back of the house and runs 25 feet with a rise of a few inches before transitioning to 3" pipe for the slight downhill run out.
Step up in pipe size for the downhill portion eases the load on the pump.
3" pipe grate will flow as much as a 2" open pipe and still acts as a barrier for small critters.
Discharge pipe runs 8 feet sideways then 97 feet to the sidewalk.
Here's the constraints:
Back yard is lower than the street.
Curb on the street is 4" tall.
Sidewalk before the curb is 2" thick.
Low discharge at curb means street water would backflow into my discharge line.
Front lawn is flat and level with the sidewalk.
Shallow elevation change means an underground pipe with a surface discharge has a lot of water filled pipe when flow stops.
Black clay turns to gumbo mud when wet so complete evacuation is desired.
The attached photo shows the known drain area. Yellow oval is the pump location. White discharge pipe can be seen leading to the sidewalk. The portion not seen in the photo is drawn in yellow.
