Wednesday, July 22, 2015

Fixing a Soggy or Flooded Lawn





With all the rain in St Louis lately, some homeowners may have issues with soggy or flooded lawns.
Not only is a soggy, muddy yard unsightly but it can also cause some problems.  Soggy puddles, also known as “ponding”, may affect the quality of your soil hurting your lawn, attract pests, and other potential issues.

There are a variety of solutions to fix a yard that has been saturated with water.  More drastic problems require solutions that may involve digging in your yard.  Before digging in your yard local utility companies need to be called to locate any wires or underground pipes.  If they exist, ask them to come out and mark them to avoid damage.
The first step to fixing a soggy lawn problem, is to remove the sod from the area you will be working to fix.  Use a shovel to carefully remove the sod and be sure to keep it so that you can replace it when your work is completed.  

Dig an area, avoiding any marked wires or pipes your utility company may have located, of about six inches wide by 24 inches deep.  A power trencher (which can be rented at most equipment rental stores) will make the job easier.  Dig the trench all around the soggy area, and at the end of it dig a location where the excess water can flow out.  Fill this area with a gravel bed, or if permitted in your location you may be able to relocate the water to the street.

Once your area is dug out, place a layer of landscape fabric in the trench making sure to cover the bottom and side areas; leave enough fabric to fold over when gravel is filled in. Fill the trench with washed clean gravel to a depth of two inches.  Do not pack gravel.  Place a 4 inch diameter pipe on top of the gravel, running the length of the trench.  Perforated pipes should be used in soggy areas, and regular pipe for the rest.  Place pipe that only has holes on one side, the holes pointing downward.   Be sure to angle the pipe to drop at least an inch every eight feet, to ensure a proper drainage slope.  More gravel can be added to help correct any angle problems.  
Cover your trench with 1-inch gravel until it is filled almost to the top, leaving room for sod to be placed over the gravel, being careful not to block the discharge end of the pipe.  Fold landscape fabric over gravel filled trench making sure to cover area completely.  Hide the fabric by tucking in over complete area.  Final step is to carefully replace original sod to area dug out and stamping it into place.  Do not put sod over the area of pipe where water will discharge.