[4-3-2006]
The purpose of this chapter is to establish minimum storm water
management requirements and controls to protect and safeguard the
general health, safety, and welfare of the public residing in watersheds
within this jurisdiction. This chapter seeks to meet that purpose
through the following objectives:
A.
Minimize increases in storm water runoff form any development
in order to reduce flooding, siltation, increases in stream temperature,
and streambank erosion, and maintain the integrity of stream channels.
B.
Minimize pollution caused by storm water runoff from development
that would otherwise degrade local water quality.
C.
Minimize the total annual volume of surface water runoff that
flows from any specific site during the following development to not
exceed the predevelopment hydrologic regime to the maximum extent
practicable.
D.
Reduce storm water runoff rates and volumes, soil erosion and
pollution, wherever possible, through storm water management controls
and to ensure that these management controls are properly maintained
and pose no threat to public safety.
[4-3-2006]
This chapter is not intended to interfere with, abrogate, or
annual any other chapter, rule or regulation, statute, or other provision
of law. The requirements of this chapter should be considered minimum
requirements, and where any provision of this chapter imposes restrictions
different from those imposed by any other chapter, rule or regulation,
or other provision of law, whichever provisions are more restrictive
or impose higher protective standards for human health or the environment
shall be considered to take precedence.
[4-3-2006]
If the provisions of any article, section, subsection, paragraph,
subdivision or clause of this chapter shall be judged invalid by a
court of competent jurisdiction, such order or judgment shall not
affect or invalidate the remainder of any article, section, subsection,
paragraph, subdivision or clause of this chapter.
[4-3-2006]
APPLICANT
A property owner or agent of a property owner who has filed
an application for a storm water management permit.
CHANNEL
A natural or artificial watercourse with a definite bed and
banks that conducts continuously or periodically flowing water.
DETENTION
The temporary storage of storm runoff in a storm water management
practice with the goals of controlling peak discharge rates and providing
gravity settling of pollutants.
DETENTION FACILITY
A detention basin or alternative structure designed for the
purpose of temporary storage of stream flow or surface runoff and
gradual release of stored water at controlled rates.
ILLINOIS URBAN MANUAL
The Illinois Urban Manual developed by the USDA Natural Resources
Conservation Service and the Illinois Environmental Protection Agency
current edition.
INFILTRATION
The process of percolating storm water into the subsoil.
LAND DISTURBANCE ACTIVITY
Any activity that changes the volume or peak flow discharge
rate of rainfall runoff from the land surface. This may include the
grading, digging, cutting, scraping, or excavating of soil, placement
of fill materials, paving, construction, substantial removal of vegetation,
or any activity which bares soil or rock or involves the diversion
or piping of any natural or man-made watercourse.
MWRDGC
Metropolitan Water Reclamation District of Greater Chicago.
OFF-SITE FACILITY
A storm management measure located outside the subject property
boundary described in the permit application for land development
activity.
ON-SITE FACILITY
A storm water management measure located within the subject
property boundary described in the permit application for land development
activity.
REDEVELOPMENT
Any construction, alteration or improvement exceeding 1.0
acre in areas where existing land use is high density commercial,
industrial, institutional or multi-family residential.
STORM WATER MANAGEMENT
The use of structural or non-structural practices that are
designed to reduce storm water runoff pollutant loads, discharge volumes,
peak flow discharge rates and detrimental changes in stream temperature
that affect water quality and habitat.
WATERCOURSE
A permanent or intermittent stream or other body of water,
either natural or man-made, which gathers or carries surface water.
[4-3-2006]
Unless judged by the Village to be exempt or granted a waiver,
the following performance criteria shall be addressed for storm water
management at all sites:
A.
All site designs shall, to the maximum extent possible, establish
storm water management practices to control the peak flow rates of
storm water discharge associated with specified design storms and
reduce the generation of storm water runoff. These practices should
seek to utilize previous areas for storm water treatment and to infiltrate
storm water runoff from driveways, sidewalks, rooftops, parking lots,
and landscaped areas to the maximum extent practical.
B.
To protect stream channels from degradation, a specific channel
protection criterion shall be provided as prescribed in the Illinois
Urban Manual.
C.
Certain industrial sites are required to prepare and implement
a storm water pollution prevention plan, and shall file a notice of
intent (NOI) under the provisions of the National Pollutant Discharge
Elimination System (NPDES) general permit. The storm water pollution
prevention plan requirement applies to both existing and new industrial
sites.
D.
Prior to design, applicants are required to consult with the
Village to determine if they are subject to additional storm water
design requirements.
E.
The calculations for determining peak flows as required by the
MWRDGC shall be used for sizing all storm water management practices
where applicable.