It's only a little grass in the street, what harm could that cause? As it starts out, not much, but add tens and hundreds of areas and it quickly becomes a major issue. Grass in the curb will block the stormwater from getting to the catch basin. The drainage at the blocked area will push the water out into the travel lanes of the street and potentially cause accumulation and cause a motorist to lose control of the vehicle.
Once the grass gets wet, it tends to stick together and start to
decompose. It is almost like creating compost in the street. This
problem perpetuates the previous, as more and more grass gets caught up
in the blockage with each mowing.
Storm sewer systems are engineered to reduce flooding in the street and
private property. When the catch basins become blocked with grass, the
capacity is taken away from accepting water. Accumulation occurs around the
catch basin, which can lead to localized flooding and possibly property
The stormwater travels through a series of progressively larger pipes
until it outlets into a ditch, stream, river, or pond. It does not take
much for a twig or small tree branch to enter the catch basin and
attempt to travel down stream. Sometimes stones or other material get
caught in the pipes which act as a dam and additional debris catcher for
grass. The grass begins to compost, and release pollutants like
phosphorus or nitrogen into the stormwater every time it rains. The fertilizer and composition of grass will impact the ecosystem where the stormwater releases into a waterway.
When hazardous weather approaches, it there is not enough time for our
staff to make sure every catch basin is cleared off and all debris
(grass/leaves) are cleared out of the curb to prevent potential
flooding. That is why we need your help to make sure the systems
operate efficiently by not mowing grass into the curb. Please take the
time to sweep or blow the street grass back onto the lawn. If you have
catch basins in your neighborhood, take the time to make sure it is
cleared off before rainfalls come.
The Village has ordinances prohibiting discharging grass into the
help to protect the environment and your community from the damage that
grass clippings can inflict!