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Stormwater Disposal Overview
- 1. Nelson Perez-Jacome, PE Christopher Benosky, PE Tom McGowan, PE October 29, 2018 City of Miami Beach Stormwater Disposal Overview
- 2. Today’s Topics 01 Background 04 Odor Control Within Storm Sewer System 03 Outfall Discharge and Pollution Control 02 Drainage Wells
- 3. AECOM’s Worldwide Water Practice
- 4. #1 Dams and Reservoirs #2 Storm Sewers #2 Wastewater Treatment Plants #2 Sewer and Waste #2 Sanitary Sewers #3 Water Supply #3 Water Treatment and Desalination Plants #4 Water Transmission Lines and Aqueducts 2018 Top 500 Design Firm Survey Rankings: Water Engineering News-Record
- 5. Water Fast Facts Our business encompasses: Water Fast Facts 6,000 Water professionals around the globe 2,300 Water professionals based in North America >100 Years Planning, designing and managing water systems
- 6. Nearly 1,700 Class V wells throughout Miami Beach • Majority of wells are privately owned Backflow preventers prohibitively expensive (~$25,000 each) Drainage Wells Total Stormwater Outfalls to Bay = 8,000 City of Miami Beach Outfalls to Bay = 367
- 7. Monitoring Wells 14 Sites throughout Miami Beach 3 wells at each location = 42 wells Analyzed groundwater data to: • Provide foundation for engineering decisions • Assist City with the development of hydrologic models Well-type Depth in Feet Shallow Intermediate Deep 20-40 85-110 170-210
- 9. Message: impacts of wells Sunny Day Flooding - Wells are hydraulically connected to groundwater - King tides induce ponding - Pedestrian and vehicular traffic is affected
- 10. Message: impacts of wells Exacerbated Public Storm Sewer - King tides cause denser salt water to push fresh water column up from private systems. - Water from private systems is collected by the public system
- 11. Message: impacts of wells Impacts on Adjacent Wells - Wells can create a positive pressure head on adjacent wells - Ponding is further exacerbated by this effect.
- 13. Injection Wells Pressurized wells can cause groundwater mounding Groundwater mounding can create additional infrastructure issues, adversely impacting pavement and thoroughfares Injection Wells Pump Pollution Control Pressurized Well Ground Water Mounding
- 14. Subsurface Dispersion of Contaminants - In cases where contaminants are present in drainage well discharge – adjacent surface waters may be impacted
- 16. Outfall Discharge and Pollution Control
- 17. Pumps, Pipes, and Interceptors Pump Stations Force Main and Backflow Preventers Debris Removal Chambers
- 18. Stormwater Treatment Strategies Ocean / Bay Outfall
- 19. Frequent Rain Flooding: Kit of Parts Green Infrastructure Catchments Bioswales and Rain Gardens Improved Open Space and Recreation
- 21. Odor Muck French Drain Storm Drain Organic material is commonly found in soils throughout Miami Beach Anoxic environment can create foul odors It is possible for odors to be introduced to adjacent storm sewers
- 22. Questions? 22
Editor's Notes
- Fully integrated infrastructure firm Focused on client service and community needs Diverse technical and management disciplines Strategic industry, technology and academic and research partnerships Local delivery with global reach Leverage full strength of AECOM’s multidisciplinary talent Named one of Fortune magazine’s “World’s Most Admired Companies” for the fourth consecutive year