9.1 MGD WWTP 11 pump stations miles of. Force main

Transcription

1 May, 2013

2 9.1 MGD WWTP 11 pump stations miles of Force main

3 SMRSA s Cost of Rehabilitation after: Super Storm Sandy: $11.5 M Hurricane Irene: $2.5 M 2009 Nor'easter: $1.8 M CREAT assisted SMRSA in making decisions to prepare for climate challenges.

4 More frequent days with temperatures over 90 F. Severe flooding due to sea level rise (rising 2x more than the global average in NJ). Severe flooding due to heavy rain events. Increase in the intensity and frequency of storm surge, coastal flooding and erosion.

5 Uses of CREAT: EPA tool developed for water and wastewater utilities. Identifies potential climate change threats a utility s assets. Performs baseline assessment of the utility s current resilience to these threats. Designs strategies to build additional resiliency to projected climate changes. Helps utilities identify risk reduction strategies and associated capital costs.

6 Two (2) Assets were selected for analysis in CREAT: Belmar Pump Station Located outside of the flood zone; Received structural damage from Sandy 16 DIP Force Main- 6 ft above sea level; Erosion concerns from future storm surges 16 DIP Force Main Belmar Pump Station (EL 15 ft)

7 CREAT identified three major threats to Belmar Pump Station and force main system: Beach erosion Coastal storm surges Intense & frequent storm events, resulting in increased I&I (infiltration & inflow)

8 The assets and threats are linked into pairs. All CREAT identified threats are not applicable to every asset.

9 Each asset-threat pair was analyzed for 2 time periods: Mid- century ( ), represented by the year 2035 Late century ( ), represented by the year 2060 Each asset-threat pair was analyzed for 2 future climate scenarios (using CREAT provided data): Hot and Dry Warm and Wet

10 Current protective measures taken at Belmar Pump Station: Follow Emergency Response Plan for Flooding Updated every 2 years Construct temporary flood barriers Use of sand bags Installation of plywood on doors and window Initiate Wastewater Bypass Pumping System Direct wastewater flow to force main with the use of a portable pump

11 Current Protective Measures for Belmar Force Main: There are no measures in place to protect the force main against erosion.

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14 Analyze each previously identified threat-asset pairs for all time periods and climate scenarios Time Periods: Mid-century, Late century Climate scenarios: Hot & Dry, Wet & Warm 12 assessments were conducted in the case study

15 Future actions SMRSA is considering to protect Belmar pump station: 4 ft Flood Doors at the existing Belmar Pump Station (estimated cost $12,500) A mobile enclosure that protects critical pump station components. (estimated cost $ 1.9 M) Relocate Belmar Pump Station outside of flood zone. (estimated cost $ 4.4 M)

16 Sea Girt Pump Station has a mobile enclosure that houses critical electrical and emergency power generation equipment that can be relocated to areas that are not flood prone during in climate weather.

17 Future actions SMRSA is considering to protect the pump station against climate related threats: Sheet piles in the location of the existing force main to protect from erosion (estimated cost $3 Mil) Install new force main in a location further inland and out of the flood/erosion zone (estimated cost $6.6 Mil)

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19 CREAT calculates risk reduction based on the difference between risk levels between baseline conditions and resilience analyses. Output: Risk Reduction Units (RRUs) Risk Reduction per adaptive measure Dollars per Risk Reduction Unit The adaptive measures can be selected to create a planning package that can be organized by risk reduction or cost.

20 Adaptive Measures Capital Cost Annualized Capital Cost** Risk Reduction Units 2035 Risk Reduction Units 2060 Total RRUs Annualized $/RRU Relocate Belmar Pump Station $4,400,000 $295, $ 3,025 Relocate & install new force main $6,600,000 $433, $10,082 Total Risk Reduction Units for Package 1: RRUs **Annualized Capital Cost is calculated over 20 years, with a 3% interest rate

21 Adaptive Measures Capital Cost Annualized Capital Cost** Risk Reduction Units 2035 Risk Reduction Units 2060 Total RRUs Annualized $/RRU Mobile enclosure $1,900,000 $127, $1,267 Relocate & install new force main $6,600,000 $433, $10,082 Total Risk Reduction Units for Package 2: RRUs **Annualized Capital Cost is calculated over 20 years, with a 3% interest rate

22 Adaptive Measures Capital Cost Annualized Capital Cost** Risk Reduction Units 2035 Risk Reduction Units 2060 Total RRUs Annualized $/RRU Flood doors for existing Belmar pump station Sheet piling for existing force main $12,500 $ $30.00 $3,000,000 $201, $18,335 Total Risk Reduction Units for Package 3: 39 RRUs **Annualized Capital Cost is calculated over 20 years, with a 3% interest rate

23 Package 1 Package 2 Package 3 $11 M $8.5 M $3.0 M

24 CREAT generates a report that documents assets, threats, risk reduction metrics, and planning options. Builds public confidence by conveying the message that utilities are proactively thinking about protecting their assets.

25 Questions? Michael J. Ruppel, Rina N. Dalal,