EPSC Module 3 Unit 3

1. UNIT 3
Module 3

2. “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

3. Design Considerations
What 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

4. Compaction Infiltration
Avoiding traditional construction
methods (Compaction)
Keeping large equipment outside
of infiltration area, more labor
intensive.

5. Phasing: When to Install?
Follow Plans

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

7. Protect the Investment
• Maintaining controls to keep sediment out of infiltration area.

8. Subcontractor Communication
• Educate / Train subs.
• Allowing pollutants/ sediment into green practice will prohibit
infiltration and result in reconstructing green practice.

9. End of Module 3
• Add questions