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Maumee River & Swan Creek Public Meeting #2 – Options Long Term Combined Sewer Overflow Control Plan Input March 9, 2005
Discussion Agenda <ul><li>Long Term Control Plan Recap </li></ul><ul><li>Control Alternatives </li></ul><ul><ul><li>Common...
CSO Control Planning <ul><li>The City must control CSO discharges according to the consent decree. </li></ul><ul><li>Alter...
Project Timeline <ul><li>The Long Term Control Plan Document is scheduled to be submitted to USEPA in July 2005. </li></ul...
Combined Sewer Area Overview
Combined Area –  Maumee River & Swan Creek
Maumee/ Swan Creek  Overflow Frequency CSO ID #/Year 4 16 5 28 6 14 7 30 8 4 9 25 23 13 24 5 25 15 26 17 27 23 28 1 29 <1 ...
Maumee/ Swan Creek  Overflow Volume CSO ID Volume mg/yr 4 7 5 30 6 5 7 77 8 1 9 115 23 5 24 <1 25 5 26 5 27 10 28 <1 29 <1...
Alternative Evaluation <ul><li>Alternative evaluation is based on reducing the frequency of overflow to 0 – 12 times a yea...
CSO Control Options <ul><li>Three basic control options were considered: </li></ul><ul><ul><li>Storage – holds excess flow...
Measurable Benefits of CSO Control <ul><li>Reduced frequency of CSO discharge. </li></ul><ul><li>Reduced volume of dischar...
Alternative Definition <ul><li>Alternatives have been identified for subareas of the Maumee River and Swan Creek. </li></u...
Alternative Common Elements <ul><li>The number of overflow locations would be reduced from the existing 26 to a minimum of...
Alternative Common Elements <ul><li>Remaining overflow would have less pollutant concentration. </li></ul>
Alternative Common Elements <ul><li>The tunnel systems would be improved to reduce overflow frequency and improve maintena...
Alternative Common Elements <ul><li>Overall frequency of discharge would be reduced. </li></ul>
Alternative Common Elements <ul><li>The total volume of untreated combined sewer overflow would be reduced. </li></ul>
Alternative Common Elements <ul><li>Some partially separated areas would be completely separated. </li></ul>
Alternative Common Elements <ul><li>Outfalls would be consolidated. </li></ul>
Selection of Alternative <ul><li>Siting of Facilities </li></ul><ul><ul><li>East Toledo – three probable sites </li></ul><...
Alternative Options <ul><li>There are several different options that must be considered prior to determining the final alt...
Alternative Options <ul><li>Control technology </li></ul><ul><ul><li>The degree of technology may vary.  </li></ul></ul>
Selection of Alternative <ul><li>Technology Selection </li></ul><ul><ul><li>Storage – basins or tunnels – holds excess flo...
Alternative Options – Level of Control <ul><li>Total frequency of untreated discharge vs. cost of various alternatives. </...
Selection of Alternative <ul><li>Level of Control Selection </li></ul><ul><ul><li>The range of level of control is between...
Selection of Alternative
Selection of Alternative <ul><li>Cost </li></ul><ul><ul><li>The range of cost is large.  </li></ul></ul><ul><ul><li>Every ...
How you can help <ul><li>Provide input on the following alternative elements: </li></ul><ul><ul><li>Site Selection </li></...
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LTCP Meeting 03-09-05

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LTCP Meeting 03-09-05

  1. 1. Maumee River & Swan Creek Public Meeting #2 – Options Long Term Combined Sewer Overflow Control Plan Input March 9, 2005
  2. 2. Discussion Agenda <ul><li>Long Term Control Plan Recap </li></ul><ul><li>Control Alternatives </li></ul><ul><ul><li>Common Elements </li></ul></ul><ul><ul><li>Alternative Differentials </li></ul></ul><ul><li>Alternative Descriptions </li></ul><ul><li>Opportunity for Input </li></ul>
  3. 3. CSO Control Planning <ul><li>The City must control CSO discharges according to the consent decree. </li></ul><ul><li>Alternatives are being evaluated with respect to their feasibility, associated benefits and costs. </li></ul><ul><li>Public input on alternatives considered is sought in tonight’s meeting. </li></ul>
  4. 4. Project Timeline <ul><li>The Long Term Control Plan Document is scheduled to be submitted to USEPA in July 2005. </li></ul><ul><li>A review and modification period will follow the plan submittal. </li></ul><ul><li>The work identified in the plan is to be completed by August 31, 2016. </li></ul>
  5. 5. Combined Sewer Area Overview
  6. 6. Combined Area – Maumee River & Swan Creek
  7. 7. Maumee/ Swan Creek Overflow Frequency CSO ID #/Year 4 16 5 28 6 14 7 30 8 4 9 25 23 13 24 5 25 15 26 17 27 23 28 1 29 <1 CSO ID #/Year 30 7 31 6 32 7 33 33 42 3 43* 5 45 2 46 3 47 11 48 <1 50 <1 68* 9 69* 4
  8. 8. Maumee/ Swan Creek Overflow Volume CSO ID Volume mg/yr 4 7 5 30 6 5 7 77 8 1 9 115 23 5 24 <1 25 5 26 5 27 10 28 <1 29 <1 CSO ID Volume mg/yr 30 <1 31 <1 32 2 33 38 42 <1 43* 53 45 2 46 1 47 12 48 <1 50 <1 68* 74 69* 19
  9. 9. Alternative Evaluation <ul><li>Alternative evaluation is based on reducing the frequency of overflow to 0 – 12 times a year. </li></ul><ul><li>Total elimination of overflows would only occur in the most costly alternatives. </li></ul>
  10. 10. CSO Control Options <ul><li>Three basic control options were considered: </li></ul><ul><ul><li>Storage – holds excess flow until capacity is available. </li></ul></ul><ul><ul><li>Treatment – cleans flow before it is discharged; disinfects and removes pollutants. </li></ul></ul><ul><ul><li>Separation – provides new sanitary or storm sewers so that combined sewers are eliminated. </li></ul></ul><ul><li>Flow reduction / rerouting can enhance the above options. </li></ul>
  11. 11. Measurable Benefits of CSO Control <ul><li>Reduced frequency of CSO discharge. </li></ul><ul><li>Reduced volume of discharge. </li></ul><ul><li>Reduction in pollutants discharged. </li></ul><ul><li>Better water quality in rivers. </li></ul>
  12. 12. Alternative Definition <ul><li>Alternatives have been identified for subareas of the Maumee River and Swan Creek. </li></ul><ul><li>The following are common aspects of the defined alternatives. </li></ul>
  13. 13. Alternative Common Elements <ul><li>The number of overflow locations would be reduced from the existing 26 to a minimum of 18 and a maximum of 22. </li></ul>
  14. 14. Alternative Common Elements <ul><li>Remaining overflow would have less pollutant concentration. </li></ul>
  15. 15. Alternative Common Elements <ul><li>The tunnel systems would be improved to reduce overflow frequency and improve maintenance. </li></ul>
  16. 16. Alternative Common Elements <ul><li>Overall frequency of discharge would be reduced. </li></ul>
  17. 17. Alternative Common Elements <ul><li>The total volume of untreated combined sewer overflow would be reduced. </li></ul>
  18. 18. Alternative Common Elements <ul><li>Some partially separated areas would be completely separated. </li></ul>
  19. 19. Alternative Common Elements <ul><li>Outfalls would be consolidated. </li></ul>
  20. 20. Selection of Alternative <ul><li>Siting of Facilities </li></ul><ul><ul><li>East Toledo – three probable sites </li></ul></ul><ul><ul><ul><li>At I-280 interchange </li></ul></ul></ul><ul><ul><ul><li>In International Park </li></ul></ul></ul><ul><ul><ul><li>Near Miami and Oakdale </li></ul></ul></ul><ul><ul><li>West Toledo – two probable sites </li></ul></ul><ul><ul><ul><li>Near Jamie Farr Park </li></ul></ul></ul><ul><ul><ul><li>City owned property near Maumee Avenue </li></ul></ul></ul><ul><ul><li>Potential alternative – storage tunnel </li></ul></ul>
  21. 21. Alternative Options <ul><li>There are several different options that must be considered prior to determining the final alternatives. </li></ul><ul><li>These options include: type of control method technology, level of control. </li></ul>
  22. 22. Alternative Options <ul><li>Control technology </li></ul><ul><ul><li>The degree of technology may vary. </li></ul></ul>
  23. 23. Selection of Alternative <ul><li>Technology Selection </li></ul><ul><ul><li>Storage – basins or tunnels – holds excess flow until WWTP has capacity. No disinfection of discharge. </li></ul></ul><ul><ul><li>Treatment – basin – would include disinfection. Facilities would actually discharge more frequently than storage. </li></ul></ul><ul><ul><li>Separation can be used where existing pipe network could be converted, and where costs are comparable to other methods. </li></ul></ul>
  24. 24. Alternative Options – Level of Control <ul><li>Total frequency of untreated discharge vs. cost of various alternatives. </li></ul>
  25. 25. Selection of Alternative <ul><li>Level of Control Selection </li></ul><ul><ul><li>The range of level of control is between 0 – 12 overflows/ year. </li></ul></ul><ul><ul><li>Most approved plans have overflow frequencies of 2 – 6/ year. </li></ul></ul><ul><ul><li>Water quality benefits are limited if frequency is reduced to 8/ year or less. </li></ul></ul><ul><ul><li>Costs increase exponentially as level of control goes to zero discharges. </li></ul></ul>
  26. 26. Selection of Alternative
  27. 27. Selection of Alternative <ul><li>Cost </li></ul><ul><ul><li>The range of cost is large. </li></ul></ul><ul><ul><li>Every decision on level and type of control has a cost implication. </li></ul></ul><ul><ul><li>There tend to be diminishing returns for larger facilities. </li></ul></ul>
  28. 28. How you can help <ul><li>Provide input on the following alternative elements: </li></ul><ul><ul><li>Site Selection </li></ul></ul><ul><ul><li>Technology Preferences </li></ul></ul><ul><ul><li>Frequency of Overflow </li></ul></ul><ul><ul><li>Cost </li></ul></ul><ul><li>Provide other comments and ask questions. </li></ul>

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