Historically the storm sewer system’s primary function was to remove the rainwater from the streets. The water enters catchbasins, like the one shown below, which are connected to underground pipes. The pipes then transport the water to Lake Winnebago, the Fox River or the Neenah Slough (the water does not go to the treatment plant).
Today the storm sewer system is also used to protect the environment. The City and businesses have been installing structural devices such as detention ponds, bio-filters and cleaning manholes to remove sediment and nutrients from the runoff before it enters the lake. The City also sweeps streets, picks up leaves and cleans catch basins to keep the water entering our waterways clean.
The City of Neenah is required to have a Municipal Separate Storm Sewer System (MS4) permit along with other larger communities in the state as per Wisconsin Adm. Code NR 216. As part of the permit the City must perform the activities list below:
The City also has to comply with the standards set by the Lower Fox TMDL (Total Maximum Daily Load) and the Upper Fox/Wolf TMDL. The TMDLs establish the maximum amount of total suspended solids (TSS) and total phosphorous (TP) that the City’s storm system may release to the waterways. The City has a number of years to meet the TMDL requirements which will require numerous ponds and other best management practices BMPs. More information on these TMDLs can be found on the DNR website http://dnr.wi.gov/topic/tmdls/.
A stormwater utility was created to fund the structural and operational best management practices (BMPs) required to comply with the City’s MS4 permit and TMDL limits.
The utility charge is based on an equivalent runoff unit (ERU). An average single family home is equivalent to 3,138 square feet of impervious area or one ERU. More information on the stormwater utility and charges may be found in the Neenah Code of Ordinances Sec. 17-101 to 140 (click here).
Construction sites with 20,000 square feet or more of impervious surface disturbance and sites with one acre or more land disturbance shall reduce the total suspended solids (TSS) and shall reduce the peak discharge prior to the runoff leaving the site.
All requirements for Post-Construction Stormwater Management can be found in Sec. 22-322 to 350 of the Neenah Code of Ordinances (click here).
Learn how you can make a difference at RENEW OUR WATERS.
Become involved with stormwater projects that improve our community at Sustainable Neenah.
Erosion control during construction is perhaps the single most important element in protecting our waterways from sediment no matter how small the project. Whenever the ground is disturbed there is a potential for soil to be washed away and carried into our lakes and streams.
All land disturbing construction activity within the City of Neenah shall obtain a permit prior to commencing. Permit requirements can be found in Sec. 22-290 of the Neenah Code of Ordinances (click here).