Perhaps, "that'll do".... for now. I had the same thought. They do mix up concrete as they go. That's pretty much where the stone wall was located.
You are correct...10 years from now (or less) you'd be able to grab that casting and walk off with it...I see it all the time. If the guy attempted to "do better", then there is a ring or two of Con-Seal under there...not so much because that drain grate needs sealed (but that would be important on a sanitary manhole casting) but more to help "glue" it down.
Id have to agree. Looks like extra concrete mix. Thinking the road bed of crushed stone will be level with the top and asphalt put over it. Just a guess on my part.
I don't see them unstacking that to mortar the joints. Understand that material will be compacted around...seems jointing the blocks would be more durable...but what do I know...I am not a drainage engineer by any means (or a brickie). lol
Calling jo191145 He's the see ment expert here. I see sand so they are making there own mix whether mortar or concrete.
