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Question DetailsAsked on 9/30/2014

What kind of company should I contact to remove an inground concrete pool and lay a patio (done with pavers) ?

The pool popped up out of the ground, so it has to be demolished.

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After removal of the pool and all concrete and such and backfilling, I would say you should definitely leave the filled area over winter to settle with freezing (if applicable) and winter/spring rains - otherwise you are likely to have undesireable settlement. Even overwinter, unless you pay for structural fill compaction of ALL the fill (will roughly half again to double your fill cost), is likely to result in many inches of settlement over the next year or so, so I would recommend having it filled, with normal compaction for driveways say, to about adjacent ground level, then spread the normal crushed base material fill over it and compact that, then let sit for a year. If you just dump fill, settlement would normally be expected (for an 8 foot deep hole) to be from about 6-12 inches for clean rock or gravel fill to as much as 2-3 feet with clayey soil. After that time, then a landscaping contractor (hardscaping) can come and do the patio.

Personally, if you have the room - I would just have it filled and let sit till spring, then relevel a couple of inches above surrounding grade in a dome shape to allow for future settlement, topsoil and seed it for lawn, and put your patio on ground that has already settled - because you will rarely get the results you want from construction over a deep fill like a pool, especially if part of the construction is over the pool fill and part lies on adjacent ground that has seen long-term settlement.

Don't forget local pool removal requirements - some areas let you bury the broken up pool materials (bad idea for future resale purposes as you have to disclose it as an on-site construction demolition debris dump site, if legal in your area at all), and some require some groundwater control measures like a bentonite layer or impervious fill, etc if local well use aquifer is shallow - and if in an area with artesian groundwater (rises to above groundsurface) you have to use impervious fill to seal that aquifer back in or you will have perennial water flow from that area, causing mushy, swampy yard and possible foundation leakage issues.

Also, be sure to specify the fill material specifications (another way the engineer can help you) - because you do NOT want some junk fill from another project being dumped there, nor construction debris from other jobs or hazardous waste, contiminated fill from an underground storage tank or leach field excavation, etc. You wouldnot believe what contractors - androgue dumpers - will dump into excavations like that. I have seen everything up to and including overnight and weekend dumping of hazardous waste, medical wastes, even nuclear contaminated materials - it is amazing how word gets out in the excavation/trucking community about where contractors have a fill project going on that other try to jump on to dump materials they shouldhave been paying to dispose of properly.

Since you mentioned it floated out of the ground, you are going to have to be sure to use free-draining shot rock or gravel fill in the saturated groundwater zone so it does not get spongy, or pump it out and use impervious non-expansive soil - should consult a geotechnical engineer (typically work for civil engineers) if you have to use impervious fill to shut off the hole the pool punched in the existing aquifer. Then once above the high water level 2-3 feet (to prevent wicking of water up in the finer fill), finer grained semi-impervious compacted fill andc ontrolled drainage away from the area to prevent it becoming a trap for rainwater and snow melt, otherwise it will become a swampy area. Unless completely filled with structural fill with structural-grade compaction and proper handling of groundwater issues, refilled pool sites should ALWAYS be rebuilt to a higher elevation thaan the surrounding ground with free surface drainage, to prevent the swamp effect - I have seen that SOOO many times, and NOT cheap to remedy.

Also - be sure to get accurate measurements of the pool hole limits from permanent features so it is known where it was for future construction purposes. Ideally this would done by a surveyor and be recorded at the land recorders office - though rarely done. At least put with house documents so can provide to future buyers ifnot fully structural fill rehabilitated.

Here are a couple of prior similar questions with responses that might interest you, in no particular order -

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