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Soil subsidence soil sinking0020 Minor subsidence The cause is generally not determined. Usually Landscape Contractors can install catch basins or paved (or dirt) swales Sometimes the source of water problems is in water moving beneath the ground and out of sight. This water can be collected by means of a "french" drain, weep drain, or subterranean drain. This drain intercepts the water below the ground. The difficulty with this type of drain is in deciding where to put it and how deep. Since no one can see what is going on beneath the ground some uncertain judgements have to be made. Probably, almost any drainage problem could be solved by a large enough system. However, as a "french" drain goes deeper, the cost goes up more than proportionately Finally, the water collected has to be conducted away to a safe point of discharge. It may be necessary, in some more advanced cases, to provide yard drains to the street. These are really quite simple to install and very inexpensive, but do require a weekend or two of your time Trench digging will be required and should be attempted only by those with strength and stamina Simple yard drains will, of course, only be possible if your yard is above the street. If your property is below the street, or other proper discharge point, then use of a sump pump, to pump the water to a higher level, may be necessary Terminate the drain in such a fashion that water does not excessively flow over city sidewalks. This may be accomplished by terminating in a bed of gravel created as part of the landscape Should you desire to terminate in the street gutter, and often this is the only possible termination point, you will need to obtain a permit from your local Building Department to cut the sidewalk and/or gutter. You will also need to contact a Concrete Sawing and Cutting company and a Concrete Contractor. A slice of sidewalk and/or gutter will be cut and removed where you can place your drain pipe then new concrete inserted into the cut If drainage problems are advanced you are advised to have a Geologist or Soils Engineer fully evaluate the situation This particular site condition may be conducive to moisture migration through concrete foundations and slabs. The inspector cannot ascertain if water migration through the slab is occurring and/or is causing or contributing to indoor air quality concerns This may include, but is not limited to, fungi, mold, volatile organic compounds, etc. For further information you are advised to contact the inspector or have testing performed by other qualified persons
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