STORM WATER MANAGEMENT AND BEST MANAGEMENT PRACTICES

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STORM WATER MANAGEMENT AND BEST MANAGEMENT
PRACTICES

• Howard E. Sloan, CFM
• Assistant Village Administrator
• Village of Frankfort
• 432 West Nebraska St.
• Frankfort, Illinois 60423
• www.villageoffrankfort.com

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Location Map
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In the Beginning

• Pre-1960s Storm Water Management consisted of
  dams and levees
• USEPA drafts first storm water model in 1969
• 1973 Clean Water Act passes Congress
• 1990 EPA promulgates NPDES storm water program
• 2000 National menu for storm water BMPs released

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National Menu of Storm Water Best Management
Practices

• Public Education BMP for MS4s to inform
  individuals and households
• Public Involvement Involve public in BMPs
• Illicit Discharge Detection Elimination BMP
  to identify and eliminate discharge and spills to
  storm system
• Construction BMPs for construction sites to
  address storm water runoff
• Post-construction BMPs for developers and
  property owners to address storm water runoff
• Pollution Prevention/Good Housekeeping MS4s to
  address BMPs for own facilities

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Frankforts Storm Water History

• June 24, 1994 216 drainage complaints
• December 1994 first comprehensive storm water
  ordinance
• March 5, 1997 Storm Water Management Plan
• 2000 Water Resource Management Plan

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Water Resource Management Plan

• Holistic (BMP) Approach to Storm Water Runoff
• Identification of Receiving Areas
• Streams and Creeks
• Major Drainage Ditches
• Wetlands
• Special Flood Hazard Areas
• Storm Water Management Facilities
• Watershed Management
• Environmental and Ecological Function
• Hydrologic and Hydraulic Function
• Preservation of Natural Landscape

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Purpose of Plan

• Recognition of Importance of Natural and Native
  Areas
• Environmental Assessment of Property
• Incorporation of Environmentally Sensitive Areas
  in Land Use Plan
• Allow Development with No Adverse Impact
• Assure Proper Maintenance of Areas
• Identification of Village Ordinances and
  Regulations

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Storm Water Management in Frankfort

• Required by all development, regardless of size
• Strict design requirements
• Each project must incorporate conservation design
  elements BMP
• All work outside of SFHA
• Maintain existing wetlands and depression areas
• Provide groundwater recharge elements
• Dedicate management area as open space

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USEPA 3-Key BMP Performance Indicators

• Reduce Concentration of Pollutants Leaving BMP
  (mg/l)
• Reduction in Storm Water Volume
• Total Load Removal

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USEPA Fact SheetOnStorm Water
ManagementProperly installed and maintained
retention structures (also known as wet ponds)
and artificial wetlands can achieve a high
removal rate of sediment, biochemical oxygen
demand (BOD), organic nutrientsand are most cost
effective when used to control runoff
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Wet Basin Design is Preferred

• Reduction of Pollutants/Contaminants
• Improves Water Quality
• Retention, extended detention, infiltration and
  evapotranspiration
• Aesthetics
• Creates Recreational Use Passive Active

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Center for Watershed Protectionwww.cwp.orgEffect
iveness of Wet Basin inReducing
Pollutants/Nutrients

• Total Suspended Solids (TSS) 50 to
  91Total Phosphorus (TP) 30 to
  76Total Nitrogen (TN) 19 to
  32

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Wet Basin Design BMP Elements

• Depth below NWL i.e. wet bottom vs. wetland
• Shoreline slopes
• Basin bounce NWL vs. HWL (5 max)
• Draw down times 72 hours max. (10-year event),
  USEPA 12-48 hours
• Inlet and outlet orientation maximize separation

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Wet Basin Design BMP Elements (Continued)

• Energy Dissipation at basin inlets outlets
• Safety ledge for wet bottom 10 average width
• Permanent pool volume equal to 2-year event from
  watershed
• Stilling/Sediment basins min. 500 cf/ac of
  impervious surface for drainage area
• Vegetated buffer strip
• Wet basin design by qualified designer/ecologist

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Naturalized Landscaping BMP

• Definition Ecologically sensitive landscaping
  that uses regional native plant species to
  create, improve or restore specialized and
  self-sustaining plant communities for identified
  areas i.e. wet basins, wetlands, prairie,
  woodland, etc.

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Naturalized Landscaping BMP

• Landscape plan required for all new storm water
  management areas
• Landscape plan and plant selection must consider
  hydrograph for basin
• Short term (3-5 years) and Long term (5 years)
  maintenance included in plan
• Letter-of-Credit (115 of value) required
• Monitoring Reports required near term annually
  and long term every 5-years
• Prohibit activity in naturalized area dumping,
  alterations, structures, chemical applications
  (other than for maintenance)

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Old Days of Storm Water Management
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New Day has DawnedWet Basin Storm Water
Management Facilities
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Shoreline Issues
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Old Solution
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BMP Solution
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Inlet Outlet Issues
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There are Alternatives
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And these
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I like this approach!
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Energy Dissipation
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Maximize Separation
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Siltation SedimentationIts a Problem
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Here are BMP Solutions
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Buffer Protection
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Buffer Suggestions
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Summary

• Storm Water Ordinance include BMP
• Holistic Approach Evaluate watershed
• No Adverse Impact by development
• Storm Water Management BMP require a plan
• Wet Basin Preferred
• Incorporate naturalized/native plant material
• Enforcement

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Conclusion

• Village of Frankfort
• Water Resource Management Plan
• Engineering Design Standards
• Landscape Ordinance
• Flood Regulation
• www.villageoffrankfort.com
• - Document Library
• - Browse
• - Map/Ordinance