Lawns, gardens, flowerbeds, woods, retention basins. Almost every natural area is not considered an impervious surface.
Unless gravel is specifically designed to be pervious, gravel is an impervious surface. Gravel is compacted and acts in that same way as concrete or asphalt.
An impervious surface is a hard surface that does not allow rain to absorb into the ground. Impervious surfaces increase stormwater runoff. Some examples are roofs, parking lots, driveways, and sidewalks.
There are certain base costs that exist to manage the system and to provide a drainage system to connect to. In addition, the City has regulatory requirements that they must meet that affect the entire community.
For the first year, residential properties will pay $3.00 base fee per month. After the first year, residential properties will pay $3.67 per month. For the first year, non-residential properties will pay $3.00 base fee per month. After the first year, non-residential properties will pay $3.00 per month + $0.67 for every 4,500 sf of impervious surface that is on their property.
User fees are a fee for services provided and have been common throughout the Country and in many cities in Illinois. They are used to fund all or part of public works programs such as water, sewer and stormwater. Utility fees are based on the amount used. Taxes, generally speaking, do not have a direct relationship between the source of revenue and the purpose to which it is applied. Not all properties pay taxes.
The City has identified over $60 million in projects to reduce flooding problems within the City and requires an increase of preventative maintenance of the drainage system. Also, Federal and State regulations on stormwater are becoming increasingly restrictive and the City must comply with those regulations as well. To meet these challenges, the City has established a Stormwater Utility. The stormwater utility, supported by equitable fees, would provide a dedicated funding source to reduce flooding, replace storm sewer pipes, reduce stream bank erosion, and meet regulatory requirements to reduce stormwater pollution.
The City of Decatur has established a stormwater utility. Like electricity, water and sanitary sewers, stormwater runoff can be managed as a utility. The utility will be supported by fees that every property owner within the City would be billed for. The stormwater utility service charge will be added to the City Utility Bill.