3 cleanouts in front yard right next to each other?

[LoterGarry]

Would like to know why I have 3 cleanouts in our front yard right next to each other. Planning on putting some pavers in this area and was wondering if I can just cap 2 of them and put pavers over the top and leave one showing? If I remember correctly other houses I have lived at only have had 1 cleanout in the front but I could be wrong, there may be a purposes to having multiple? I've looked down them and they all go fairly deep like 5 feet or so. I assume they all tie into the main sewer line exit.
Here's a pic

[LanestIo]

Foundation drains? Two cleanouts for the two ways around the perimeter of the house, plus one DWV cleanout.

[Sanidly]

I had a similar project and ended up using https://emersonproservices.com/mason...ers-frisco-tx/ because I liked their straight-up pricing and the fact they handled everything from the patio layout to fixing some older brickwork. The free consultation made it easier to figure out what I actually needed, and their crew showed up on time and did solid work without dragging things out.