Concrete sump pit

[admiralstubing]

I want to put a cover on this sump pit. The following aspects of the situation have me a bit paralyzed here:

• The pit is a cast concrete cylinder of some sort, 19" inside diameter (about 22" deep).
• The top of the cylinder sits about 1 inch below the slab.
• The pit sits very close to a sewage pit (which does have a plastic basin with a lid bolted on). The sewage basin top also sits a bit below the basement slab, and the rings of would-be slab concrete intersect each other - there is not continuous flat floor between the two pits
• A decent amount of water comes from the bottom of the pit (which is sort of loose broken concrete/gravel), not from the drain tile pipe. (I assume this takes pressure off the slab, so important?)

The problems I'm running into: I had planned to just add anchors in the concrete and put a cover for an 18" pit on it, but those all have bolt holes on a 19.5" circle. The fact the two pits are touching prevents me from just putting a larger cover on the slab. I can think of some ideas, most involve pouring concrete to make a top amenable to a lid. I can think of a few approaches (most involve pouring some concrete to reform the top - maybe even drop in a form tube to shrink it to 18"?). But I'm curious what others would do suggest.

 

[dmmsr]

I have seen people make their own lids out of plexiglass. You can try that so this way you can customize it.

 

[admiralstubing]

I have seen people make their own lids out of plexiglass. You can try that so this way you can customize it.

Yep, I think that's what I'll do. Thanks!