Stormwater Grit Tank and Well Box

[nstessen]

I have an existing system for a project that currently has stormwater flowing into these grit tank and well box combos with a dividing wall between the catch basin/stormwater outlet and the drainage well. It appears the catch basin side of the box the stormwater flows into the box and then must flow down and under the divider wall before being able to drain into the drainage well. The stormwater pipe outlet into the grit box and the well are at the same elevation. My question is for an existing grit tank/drainage well what should we expect to see upon inspection? Is there any standard or association to adhere to for the maintenance of the grit tank? I am assuming over time that grit and dirt will slowly fill up in the bottom is this an issue with this kind of design?

This is my first time experiencing one of these grit tank and drainage well boxes so any guidance is much appreciated.

 

[Artisi]

On inspection you would expect to see grit, if not- then the system isn't working / collecting grit.
Further, it is possible there is a maximum level of grit that will be collected in the grit box after which any further incoming grit will be carried over into the drainage well.
Site experience will establish the best operating criteria.

It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)

 

[LittleInch]

Got a drawing / section / sketch?

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[nstessen]

Here is a detail.