Old Well Pit Inside Home

[mrfmke]

A first floor room (was an addition) inside of my home has an old well pit below it, and we recently abandoned the well. The city water was brought in and the city water line connections are running through the old well pit. There was a sump pump removed, so the pit is filling up with groundwater, currently 3 feet high in a 5' high pit.

There's currently an access hatch but I'm looking to put new flooring in the room, so I want to cover the access to the pit with concrete. Some contractors have recommended filling the whole pit up with gravel then putting concrete over the top. However, a couple have said just put a piece of plywood near the top of the pit and concrete over that, leaving the void below. Any suggestions as to which route makes more sense?

 

[Geofd]

If there was a sump pump there were was it piped to????? I think I would want access I'm not sure it's good to have that water under the house but I don't know the history

 

[mrfmke]

If there was a sump pump there were was it piped to????? I think I would want access I'm not sure it's good to have that water under the house but I don't know the history

The pump was piped to the outside. The history was it was a standalone well pit with a poured foundation, about 6x6x6. The addition was built over it, the whole house is slab on grade, no basement. So this is the only sub-grade space. A few other people I've talked to said this is my groundwater level and its nothing to be concerned about.

 

[Geofd]

Got it , I'd feel more secure with a pump and access, but I don't know enough about it,I guess the one thing you could do is mark the water level and see if it rises

 

[Valveman]

If it is surface water I would want a sump pump as it is getting close to the slab. If it is well water the well needs to be properly plugged with cement.