UNIT 3

Module 3

“Green” - What is it?

Green Infrastructure / Low Impact Development

• Not traditional storm water management – rapid conveyance of water via storm sewers to surface waters

• Green Infrastructure- practices designed & constructed for infiltration of water into ground water table.– retains and promotes rainfall infiltration

– mimics natural infiltration

Design ConsiderationsWhat we are learning

• Protecting the green practice while normal construction is progressing?

– Phasing BMP’s

• Delineating green areas (signage, fencing, etc.)

• Prevent construction traffic from compacting area

– Installing green practice when appropriate

• Allowing plant material to establish

– Protection up to 100yr storm

Compaction Infiltration

Avoiding traditional construction

methods (Compaction)

Keeping large equipment outside

of infiltration area, more labor

intensive.

Phasing: When to Install?Follow Plans

Protect the Investment

• Ensuring controls are in place and maintained to prevent sediment from green practice until stabilization is achieved.– Sediment prohibits infiltration

Protect the Investment

• Maintaining controls to keep sediment out of infiltration area.

Subcontractor Communication

• Educate / Train subs.

• Allowing pollutants/ sediment into green practice will prohibit infiltration and result in reconstructing green practice.

End of Module 3

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