Over time blocks and bricks used to construct your catch basins begin to fail and deteriorate. This is mainly due to erosion. If the surrounding asphalt or concrete around your catch basin is cracked or heaved, it may be time to get your manhole and catch basin repair done.
In order to prevent a costly repair, get the problem fixed as soon as you see signs of failure. Once the blocks and bricks are deteriorated, the main structure is no longer secured. Cars driving, parking over them or even snowplows hitting them will create more stress on the steel grates. This makes the entire top structure sink, creating more liability.