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Incorporating a grate over the drainage trench serves multiple purposes. First and foremost, the grate acts as a filter, preventing larger debris from entering the channel and causing blockages. This is particularly important in urban settings, where leaves, litter, and other materials can accumulate rapidly, obstructing the flow of water. By keeping the channel clear, grates reduce the need for frequent maintenance and cleaning, thereby lowering long-term maintenance costs.
drainage trench channel drain with grate

The noise emitted from a manhole cover is often a byproduct of its design and installation. Over time, wear and tear can lead to gaps between the cover and the frame, creating a resonant chamber that amplifies the sound of vehicles passing overhead. This phenomenon not only contributes to the urban soundscape but also represents a challenge for city planners and engineers. The constant noise pollution can be a source of irritation for residents, prompting complaints and demands for maintenance. Local governments must balance the need for functional infrastructure with the desires of the community for peace and quiet.
noisy manhole cover
