Portsmouth City Council August 3, 2015 CITY OF PORTSMOUTH - - PowerPoint PPT Presentation

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Portsmouth City Council August 3, 2015 CITY OF PORTSMOUTH - - PowerPoint PPT Presentation

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Peirce Island Wastewater Treatment Facility Portsmouth City Council August 3, 2015 CITY OF PORTSMOUTH WASTEWATER DIVISION 1 Introductions Terry Desmarais, City Engineer Mark Laquidara, PhD, P.E., AECOM CITY OF PORTSMOUTH WASTEWATER

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CITY OF PORTSMOUTH WASTEWATER DIVISION 1

Portsmouth City Council August 3, 2015

Peirce Island Wastewater Treatment Facility

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CITY OF PORTSMOUTH WASTEWATER DIVISION

  • Terry Desmarais, City Engineer
  • Mark Laquidara, PhD, P.E., AECOM

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Introductions

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CITY OF PORTSMOUTH WASTEWATER DIVISION

AECOM Technical Advisor

  • Mark Laquidara, PhD, P.E., AECOM
  • Doctorate in Environmental Engineering
  • Highest Grade Licensed Wastewater Operator
  • Deputy Director of Process Control, MWRA Deer Island

WWTF (Boston, MA)

  • 40 Years of Experience with Emphasis on Cost Optimization
  • Technology Leader for AECOM and Project Advisor
  • AECOM
  • Global Firm Specializing in Wastewater and Water Treatment
  • Ranked #1 Engineering Design Firm in World (ENR, 2009-

current)

  • Focus on Innovative/Alternative Nutrient Removal Systems

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CITY OF PORTSMOUTH WASTEWATER DIVISION

Biological Aerated Filter Selection

  • Wastewater Treatment Technology Selection
  • 5 Year Process
  • Continuous Review of Best Technology by Multiple Experts
  • Evaluations Focused to Optimize for City’s Needs
  • Biological Aerated Filter
  • High Rate Treatment Systems
  • Considered New and Innovative
  • 21st Century Technology
  • Proven Operational Track Record

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Biological Aerated Filter Selected Based on a Cost and Criteria Matrix as the Technology that Best Met the City’s Needs

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CITY OF PORTSMOUTH WASTEWATER DIVISION

Project Costs

  • Overall Project Costs
  • Capital Replacement (“Maintenance”) Costs
  • Other Upgrade Items
  • Upgrade Cost Saving Recommendations
  • Roadways
  • Peirce Island Road Bridge

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CITY OF PORTSMOUTH WASTEWATER DIVISION 6

Project Cost - $79.8M

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CITY OF PORTSMOUTH WASTEWATER DIVISION

Capital Replacement (“Maintenance”) Items

  • Replacement of Routinely Serviced Equipment and

Other Materials That Have Exceeded Their Intended Useful Life

  • Majority of Equipment and Materials from 1990

Upgrade (25 Years of Service)

  • Upgrade Cost Components
  • Total Cost $79.8M
  • Capital Replacement Costs $25.3M
  • Other Upgrade Items $54.5M

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CITY OF PORTSMOUTH WASTEWATER DIVISION

Recommended Cost Reduction Items

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Item Estimated Cost Reduction ($Million) Close Island (at Four Tree Is.)During Const ($0.4) Eliminate Odor Control ($1.8) Increase Height of BAF to 33-feet ($2.2) Use Gray Textured Façade on Portions of BAF ($0.2) Use Overhead Electric from Pool to Facility ($0.7) Use Exterior Finish Insulation System ($0.5) Subtotal Reduction Items ($5.6) Secondary Only Treatment ($6.5) Total Reduction Items ($12.3)

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CITY OF PORTSMOUTH WASTEWATER DIVISION

Close Island (at Four Tree Island) During Construction

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Construction Area Area Closed to Public Temporary Staging Areas State Fish Pier, Pool and Four Tree Island Remain Open

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CITY OF PORTSMOUTH WASTEWATER DIVISION

Rendering 33-ft BAF

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CITY OF PORTSMOUTH WASTEWATER DIVISION

Rendering 33-ft BAF

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25-FT – Brick Façade

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CITY OF PORTSMOUTH WASTEWATER DIVISION 12

25-FT – Gray Textured Façade

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CITY OF PORTSMOUTH WASTEWATER DIVISION

Gray Texture Façade Option

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CITY OF PORTSMOUTH WASTEWATER DIVISION

Rendering 33-ft BAF

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33-FT – Brick Façade

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CITY OF PORTSMOUTH WASTEWATER DIVISION

Rendering 33-ft BAF

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33-FT – Gray Textured Façade

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CITY OF PORTSMOUTH WASTEWATER DIVISION

Upgrade Scenarios

Current Design Alternative 1 Alternative 2 Staff

Recommended

Treatment Technology

Biological Aerated Filter Biological Aerated Filter Conventional Activated Sludge Biological Aerated Filter

Treatment Level Nitrogen Removal Secondary Secondary Nitrogen Removal Site Limits In Fence In Fence Outside Fence In Fence Cost ~$79.8M ~$73.3M ~$70.0M ~$77.0M Cost Savings

  • ~$6.5M

~$10.0M ~$2.8M Expansion Costs

  • >$6.5M

>>$10M

(Further Outside Fence)

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CITY OF PORTSMOUTH WASTEWATER DIVISION

Roadways

  • Normal Wear and Tear Ongoing
  • Public Projects, Private Projects, Travelling Public,

Business Use, and Weather

  • Pavement Index and CIP Currently Sets Schedule
  • Roadways
  • Focus on Proposed Haul Routes and Current Pavement

Condition Index

  • Impact from Normal Wear and Tear and Other

Construction Projects Needs to be Considered

  • Potential Paving Cost Range $0.75M to $0.95M

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CITY OF PORTSMOUTH WASTEWATER DIVISION

Peirce Island Road Bridge

  • Originally Constructed 1958 (57 Years Old in 2015)
  • Typical Lifespan of Bridge in this Environment is 50

Years

  • Consultant Evaluated Overall Bridge Condition
  • Bridge Can be Used for Construction Project with Limitations
  • n Traffic
  • Rehabilitation of Bridge More Costly than Replacement
  • Recommend Replacement of Bridge Regardless of

Construction Project in Next 5 to 10 Years

  • Potential Replacement Cost Range $5M to $7M
  • Could be Eligible for NHDOT Municipal Bridge Aid

Program with 80% Grant Funding

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CITY OF PORTSMOUTH WASTEWATER DIVISION

Questions

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