Ground water here along the coast, is a fact of life. In some placesbigpreview_Water_H2O you only have to dig two feet or so before you begin to see water gather. In other places it may be as much as six or eight feet down to water, but it is there somewhere.
Because most of our soil is so sandy, we don’t have quite the same problems as people who live in areas where their ground is clay or rock, but we still have our own issues particular to this area. We can even know when to anticipate a water problem, just by knowing the area where the pool is to be built.
So how can you know if you will have a water problem? Probably the best indicator of potential water issues is going to be whether or not you have standing water in your yard after a rainfall. If the soil is sandy, the water will easily run into the ground and you will probably not have a water issue. If, however, your backyard has water still standing a day or more after a rainfall, water is likely going to have to be controlled. Another indicator will be if you have “black dirt” under your grass, you will probably need water control. The black dirt usually won’t let water run through, and so when we dig, we start to release water that has been trapped, and it creates unstable ground in the excavation, and must be controlled.
While there are varied ways to control this water, we have found it most effective to build a drain system under the pool. A specially prepared pipe is placed into the deepest part of the excavation, usually two feet lower than the pool bottom. We excavate a cavity and partially fill the cavity with crushed stone. Then the suction pipe is placed, more stone is added and then we cover the whole thing with landscape material, and cover it with sand. As the water enters the excavation it runs through the stone into the pipe, which has been connected to a pump, and the excavation dries up very quickly. Once the pool has been placed and filled with water, we can disconnect the pump, and we leave the hose above the ground but capped and placed out of view, in case of the unlikely need to drain the pool for some reason.
Water control is an important part of the fiberglass pool construction process, and we have had a lot of practice in controlling these problems. There is usually a 20% chance overall that we will strike water during your construction process, but in some areas of the coast the chances are increased significantly.
Your pool builder should discuss this potential with you during the presentation process. There is usually an additional charge for water control – it is one of those things NOT included in an ABLE construction – and I am sure you will find it is additional with any builder.
Fiberglass inground swimming pools, are clearly the best swimming pool to serve our needs here along the coast, especially in an area where water control will be an issue. Once the pool is installed, and filled with water, future water issues should be of no consequence. With a vinyl liner pool especially, future water problems can have a sever impact on your swimming pool, and in extreme cases, water buildup can destroy the bottom of your pool, requiring extensive, and expensive, repair work.
Choose an inground fiberglass pool and never worry about ground water.