Street sweeping should be requested when the material is limited to "normal" street dirt. Items larger than sand or small stones should be reported under Debris in the Street Knowledge Base Article.
When is Street Sweeping provided?
City street sweepers sweep the entire city at least twice over the course of the spring and summer via set routes and schedules. The superintendent will evaluate the street mentioned in the call and depending upon what is found may:
Dispatch a city sweeper to attend to the issue if it is causing a dangerous or hazardous situation
Make a note to pay particular attention to that street during the next scheduled round.