1. Oak Harbor Facilities Plan
City Council Workshop
April 11, 2012
Oh910i1-8594.pptx/1

2. City’s Goal for this Project
“Recognizing that Oak Harbor is connected to the pristine
waters of Puget Sound, specifically Oak Harbor and Crescent
Harbor Bay, the City’s goal is to obtain the highest level of
water quality practical while recognizing the limitations of the
rate payers of the City to fund the improvements.”
Oh910i1-8594.pptx/2

3. Goal of Tonight’s Workshop
• Provide sufficient information to support the
Project Team’s recommendation…
– Illustrate how a 6th site compares to others based
on the City’s overall project objectives
– Provide additional cost information for alternatives
at all sites being considered
Oh910i1-8594.pptx/3

4. What comprises an alternative for evaluation?
Site
Where will a new
facility be located?
Process
Discharge
What treatment
How will the clean
technology will be
water be used?
used?
Oh910i1-8594.pptx/4

5. Recommended Alternatives
September 20, 2011 City Council Meeting
1. Consider three final sites for further evaluation:
– Windjammer Park
– Old City Shops
– Crescent Harbor
2. Develop final alternatives around membrane
bioreactor (MBR) process
– Consider AS (if applicable) for short-listed sites
3. Discharge treated effluent through new outfall in Oak
Harbor
– Evaluate opportunities for beneficial reuse
Oh910i1-8594.pptx/5

6. City Council Direction
Resolution 12-05: February 7, 2012
Report back with the following information…
1. Add a 6th site (Crescent Harbor North) to the list of
candidate sites
2. Provide additional cost information to assist in the
analysis
3. Consider both MBR and AS processes
– Windjammer Park: MBR only
4. Consider Oak Harbor outfalls for all sites
– Beachview Farm: Also consider West Beach
5. Collect and incorporate additional public input
Oh910i1-8594.pptx/6

7. Tonight’s Agenda
• Public Open House
• Overall Alternative/Site Comparison
• Additional Cost Information
– Basis of Current Cost Estimates
– Key Cost Assumptions for Each Site
– Opportunities for Phasing to Reduce Cost
• Summary and Recommendation
• Questions?
Oh910i1-8594.pptx/7

8. Six Sites Included in Resolution 12-05
Oh910i1-8594.pptx/8

9. Crescent Harbor North Site Description
• Approximately 24 acres within Urban Growth Area
(UGA)
• North of Crescent Harbor Drive
– Not on Navy Seaplane Base
• Comprised of 9 separate privately owned parcels
• Field conditions are comparable to Crescent Harbor
site (US Navy Property):
– Some wetlands evident based on aerial photos
– Similar risk of finding cultural resources
Oh910i1-8594.pptx/9

10. Crescent Harbor North Site Map
Oh910i1-8594.pptx/10

11. Triple Bottom Line Plus Technical (TBL+)
Review of City’s Objectives for the Project
E3
E2
No. of TBL+ Objectives Met
E1
S3
S2
S1
Reliable Performance
F3
F2
F1
T1 • Select treatment processes with many years of proven service
• Design for adequate redundancy
Ease of Construction
T2
T3
T2 • Avoid steeply sloped sites and/or sites with difficult access
T1 • Avoid sites where acquisition/construction could cause delays
Ideal Overall System Efficiency
Alternative
T3 • Maximize the amount of gravity flow to/from the new WWTP
• Minimize the amount of new conveyance infrastructure
Oh910i1-8594.pptx/11

12. City’s Objectives (cont.)
E3
E2
No. of TBL+ Objectives Met
E1
Low Capital Cost
F1
S3
S2 • Pursue alternatives that are lowest in cost (or “reasonably close” to low cost)
NOTE: Considers WWTP, conveyance, and outfall costs
S1
F3
Low Life Cycle Cost
F2
F2
F1 • Pursue alternatives that are lowest in cost (or “reasonably close” to low cost)
NOTE: Considers capital cost and annual O&M cost for 20-year period
T3
T2
Protect Assets for Future Economic Development
T1
Ideal
F3 • Avoid areas zoned for commercial/business use within downtown urban core
Alternative
Oh910i1-8594.pptx/12

13. City’s Objectives (cont.)
Protect Public Health & Safety
E3
E2 S1 • Minimize public and City staff exposure to toxics and chemicals
• Reliably meet NPDES permit requirements; provide for safe water quality
No. of TBL+ Objectives Met
E1
Preserve/Enhance Public Amenities
S2
S3
S2 • Preserve existing undeveloped open spaces for public use
S1 • Protect important view corridors in the community
F3
Minimize Neighborhood Impacts
S3
F2
F1 • Construct facilities to match the character of surrounding areas
• Minimize public exposure to noise, odor, and truck traffic
T3
T2
T1
Ideal
Alternative
Oh910i1-8594.pptx/13

14. City’s Objectives (cont.)
Produce Best Water Quality
E1 • Produce the best effluent quality (NTU, TSS, BOD) within a reasonable cost
• Produce “Class A” reclaimed water for beneficial reuse
Protect Culturally & Environmentally Sensitive Areas
E2
E3
E2 • Protect wetlands, streams, wildlife habitat, forests, and other critical areas
No. of TBL+ Objectives Met
E1
NOTE: Critical areas defined by OHMC
S3
Minimize Carbon Footprint
E3
S2
S1 • Pursue alternatives that emit the lowest levels of Greehouse Gases (GHG)
(or alternatives that are “reasonably close” to lowest GHG levels)
F3
F2
F1
T3
T2
T1
Ideal
Alternative
Oh910i1-8594.pptx/14

15. Crescent Harbor North TBL+ Summary
E3
E2
No. of TBL+ Objectives Met
E1 E2
S3 E1 E2
S2 S3 E1
S1 S2 S3
F3 S1 S2
F2 F3 S1
F1 F2 F3
T3 F1 F2
• Property acquisition process is
T2 T2 F1
well defined for Crescent
Harbor North
T1 T1 T1
Ideal Crescent Crescent
Alternative Harbor North Harbor • Property acquisition process is
highly uncertain for Crescent
Harbor
Oh910i1-8594.pptx/15

16. Crescent Harbor North Compares Well
with Other Recommended Sites
E3
E2
No. of TBL+ Objectives Met
E1 E2
S3 E1 E2 E2 E2
S2 S3 E1 E1 E1
S1 S2 S3 S1 S2
F3 S1 S2 F3 S1
F2 F3 S1 F2 F2
F1 F2 F3 F1 F1
T3 F1 F2 T3 T3
T2 T2 F1 T2 T2
T1 T1 T1 T1 T1
Ideal Crescent Crescent Windjammer Old City
Alternative Harbor North Harbor Shops
Oh910i1-8594.pptx/16

17. Full TBL+ Summary of Sites/Alternative
Project Through Year 2030
MBR at all Sites
E3
E2
No. of TBL+ Objectives Met
E1 E2
S3 E1 E2 E2 E2
S2 S3 E1 E1 E1
S1 S2 S3 S1 S2 E2
F3 S1 S2 F3 S1 E1
F2 F3 S1 F2 F2 S3 E2
F1 F2 F3 F1 F1 S2 E1
T3 F1 F2 T3 T3 S1 S1
T2 T2 F1 T2 T2 F3 F3
T1 T1 T1 T1 T1 T1 T1
Ideal Crescent Crescent Windjammer Old City Beachview Marina /
Alternative Harbor North Harbor Shops Farm Seaplane
Base
Oh910i1-8594.pptx/17

18. Cost remains a key question for all
alternatives/sites...
Are costs for all sites How much & why
truly equal? are costs higher?
E3
E2
No. of TBL+ Objectives Met
E1 E2
S3 E1 E2 E2 E2
S2 S3 E1 E1 E1
S1 S2 S3 S1 S2 E2
F3 S1 S2 F3 S1 E1
F2 F3 S1 F2 F2 S3 E2
F1 F2 F3 F1 F1 S2 E1
T3 F1 F2 T3 T3 S1 S1
T2 T2 F1 T2 T2 F3 ? F3 ?
T1 T1 T1 T1 T1 T1 T1
Ideal Crescent Crescent Windjammer Old City Beachview Marina /
Alternative Harbor North Harbor Shops Farm Seaplane
Base
Oh910i1-8594.pptx/18

19. To address more specific questions related to
cost, we will:
• Summarize the basis of existing cost estimates
– Cost for wastewater treatment plant (WWTP)
– Cost for conveying wastewater to the WWTP
– Cost for conveying treated effluent & outfall
• Explain key assumptions impacting cost for each
potential alternative/site
• Review potential phasing opportunities to reduce
cost, which may vary from site to site
Oh910i1-8594.pptx/19

20. Wastewater Treatment Plant Costs
Oh910i1-8594.pptx/20

21. WWTP costs are developed using a range of
information and in three basic steps:
1. Size/layout a facility to meet Oak Harbor’s
requirements
2. Develop cost estimate based on rough takeoffs,
vendor quotes, and actual designs that have been
constructed
3. Compare to similar facilities in the area to confirm
overall costs are reasonable
Oh910i1-8594.pptx/21

22. 1. MBR WWTP Sized for Oak Harbor (3.9 mgd)
8 4
9 4 4
2 7
6
10 1 9 7 7 8
NOTE:
Elements 3 & 5 only apply to AS alternative
Oh910i1-8594.pptx/22

23. 2. MBR Construction Cost Estimate
Process Element MBR
• Developed process model
1. Equalization $0.5
using Oak Harbor’s 5-year
2. Headworks $5.0 flow data
3. Primary Treatment -- • Sized process/tanks using
4. Secondary Treatment $10.1 model
5. Tertiary Treatment -- • Estimated quantities for
6. Disinfection $2.2 major cost components
7. Solids Handling $4.2 • Solicited budget pricing
from equipment vendors
8. Odor Control $3.0
• Totaled costs for Oak Harbor
9. Admin/Mnt $2.3
estimate
10. Site Work $4.0
• Compared Oak Harbor
Total Direct Costs $31.3 estimate to similar projects
Oh910i1-8594.pptx/23

24. 2. MBR Construction Cost Estimate
Cost Component MBR
Total Direct Costs $31.3
Indirect Costs (GCs, OH&P) $11.2
Subtotal $42.5
Sales Tax (8.7%) $3.7
Subtotal $46.2
Contingency (30%) $13.8
Total Construction Costs $60.0
Recommended Contingency
35%
35%
Percent of Estimate 30%
30%
25%
25%
20%
20%
15%
15%
10%
10%
5%
5%
0%
0%
Concept
Concept Final
Final
Level of Design
Oh910i1-8594.pptx/24

25. 3. MBR Cost Comparison
Lake Stevens, WA
Alderwood, WA
Oak Harbor, WA
Arlington, WA
Blaine, WA
Carnation, WA
Oh910i1-8594.pptx/25

26. Construction Cost Comparison
MBR vs. AS Options
Process Element MBR AS Diff.
1. Equalization $0.5 -- $0.5
2. Headworks $5.0 $3.2 $1.8
3. Primary Treatment -- $1.2 ($1.2)
4. Secondary Treatment $10.1 $6.3 $3.8
5. Tertiary Treatment -- $1.9 ($1.9)
6. Disinfection $2.2 $2.2 --
7. Solids Handling $4.2 $4.0 $0.2
8. Odor Control $3.0 $3.0 --
9. Admin/Mnt $2.3 $2.3 --
10. Site Work $4.0 $4.8 ($0.8)
Total Direct Costs $31.3 $28.9 $2.4
Indirect costs, sales tax, contingency $28.7 $26.5
Total Construction Costs $60.0 $55.4 $4.6
Oh910i1-8594.pptx/26

27. Site-Specific Cost Factors
The following were considered… Here’s how they compared…
$6.0
• Land acquisition Land Acquisition Allowance
$5.0
• Soil conditions
Site Project Costs, Millions
Geotechnical Conditions
Allowance
• Architecture/Landscaping $4.0
Premium Architecture
– Premium for facilities in Allowance
public view $3.0
$2.0
$1.0
$-
Windjammer Park Crescent Harbor North
Oh910i1-8594.pptx/27

28. MBR Project Cost Summary for Year 2030
$90
Site Solids Liquid
$80
$70
$60
WWTP Project Costs
$50
$40
$30
$20
$10
$0
Windjammer Park Crescent Harbor Crescent Harbor Old City Shops Beachview Farm Marina / Sea
North Plane Base
Oh910i1-8594.pptx/28

29. Wastewater Conveyance Costs
Oh910i1-8594.pptx/29

30. Basis of Comparative
Collection/Conveyance Costs
• Collection/Conveyance costs include:
– Raw sewage pipes and pump stations
• Assumptions
– Peak flows from Navy do not increase over time
– City flow increases consistent with Comp. Sewer Plan
(and with WWTP analysis)
– Pipe sizes based on 2060 flows
– Pump sizes based on 2030 flows
– ROW/land acquisition as needed
– Pipe installation includes surface repair, utility relocation,
(full Right-of-Way restoration and improvements)
Oh910i1-8594.pptx/30

31. Wastewater Conveyance, Windjammer
Oh910i1-8594.pptx/31

32. Wastewater Conveyance Direct Costs
Process Windjammer
Pump Stations $1,440,000
Force Main $654,000
Gravity Sewer $1,111,000
Manhole $188,000
Traffic Control $50,000
Dewatering, bracing, sheeting $60,000
Pavement cutting, removal $336,000
Sewer bypass, connection $80,000
Surfacing, trench patch $402,000
Restoration/cleanup $15,000
Total $4,336,000
Oh910i1-8594.pptx/32

33. Unit Price Comparison
$120
Oak Harbor Cost Est.
$100 Comparitive Price #1
Comparitive Price #2
Comparitive Price #3
$80
$60
Cost
$40
$20
$0
15-Inch Gravity Sewer 48-Inch Manhole (1% of CSTC HMA
total cost)
Item
Oh910i1-8594.pptx/33

34. Wastewater Conveyance, Crescent Harbor N.
Oh910i1-8594.pptx/34

35. Wastewater Conveyance Direct Costs
Process Windjammer Crescent
Harbor
North
Pump Stations $1,440,000 $2,480,000
Force Main $654,000 $2,131,000
Gravity Sewer $1,111,000 $551,000
Manhole $188,000 $80,000
Traffic Control $50,000 $50,000
Dewatering, bracing, sheeting $60,000 $100,000
Pavement cutting, removal $336,000 $418,000
Sewer bypass, connection $80,000 $120,000
Surfacing, trench patch $402,000 $427,000
Restoration/cleanup $15,000 $60,000
Total $4,336,000 $6,417,000
Oh910i1-8594.pptx/35

36. Wastewater Conveyance Direct Costs
Process Windjammer Crescent Crescent Old City Beachview Marina
Harbor Harbor Shops Farm Sea
North Plane
Pump Stations $1,440,000 $2,480,000 $2,480,000 $2,510,000 $3,150,000 $2,600,000
Force Main $654,000 $2,131,000 $1,585,000 $736,000 $1,689,000 $1,702,000
Gravity Sewer $1,111,000 $551,000 $975,000 $1,101,000 $1,727,000 $877,000
Manhole $188,000 $80,000 $112,000 $180,000 $248,000 $106,000
Traffic Control $50,000 $50,000 $50,000 $50,000 $75,000 $50,000
Dewatering, bracing, sheeting $60,000 $100,000 $100,000 $85,000 $100,000 $100,000
Pavement cutting, removal $336,000 $418,000 $418,000 $441,000 $675,000 $373,000
Sewer bypass, connection $80,000 $120,000 $120,000 $105,000 $155,000 $102,000
Surfacing, trench patch $402,000 $427,000 $427,000 $590,000 $850,000 $540,000
Restoration/cleanup $15,000 $60,000 $60,000 $60,000 $60,000 $60,000
Total $4,336,000 $6,417,000 $6,327,000 $5,858,000 $8,729,000 $6,510,000
Oh910i1-8594.pptx/36

37. Wastewater Conveyance Project Costs
Process Windjammer Crescent Crescent Old City Beachview Marina
Harbor Harbor Shops Farm Sea Plane
North
Total Direct Costs $4,336,000 $6,417,000 $6,327,000 $5,858,000 $8,729,000 $6,510,000
Sales Tax (8.7%) $377,000 $558,000 $550,000 $510,000 $759,000 $566,000
Subtotal $4,713,000 $6,975,000 $6,877,000 $6,368,000 $9,488,000 $7,076,000
Contingency (30%) $1,414,000 $2,093,000 $2,063,000 $1,910,000 $2,846,000 $2,123,000
Construction Costs $6,130,000 $9,070,000 $8,940,000 $8,280,000 $12,330,000 $9,200,000
Soft Costs (25%) $1,530,000 $2,270,000 $2,240,000 $2,070,000 $3,080,000 $2,300,000
Project Costs $7,700,000 $11,300,000 $11,200,000 $10,400,000 $15,400,000 $11,500,000
Oh910i1-8594.pptx/37

38. Full Replacement of R/W Cross Section
Oh910i1-8594.pptx/38

39. Wastewater Conveyance Project Costs
Process Windjammer Crescent Crescent Old City Beachview Marina
Harbor Harbor Shops Farm Sea Plane
North
Total Direct Costs $4,336,000 $6,417,000 $6,327,000 $5,858,000 $8,729,000 $6,510,000
Sales Tax (8.7%) $377,000 $558,000 $550,000 $510,000 $759,000 $566,000
Subtotal $4,713,000 $6,975,000 $6,877,000 $6,368,000 $9,488,000 $7,076,000
Contingency (30%) $1,414,000 $2,093,000 $2,063,000 $1,910,000 $2,846,000 $2,123,000
Construction Costs $6,130,000 $9,070,000 $8,940,000 $8,280,000 $12,330,000 $9,200,000
Soft Costs (25%) $1,530,000 $2,270,000 $2,240,000 $2,070,000 $3,080,000 $2,300,000
Project Costs $7,700,000 $11,300,000 $11,200,000 $10,400,000 $15,400,000 $11,500,000
Below the line project costs
Full Curb and Gutter $5,200,000 $6,900,000 $6,200,000 $5,200,000 $8,300,000 $6,300,000
Oh910i1-8594.pptx/39

40. Treated Effluent Conveyance
& Outfall Costs
Oh910i1-8594.pptx/40

41. Potential Outfall Locations
Crescent Harbor
Mitigate Shellfish Impact With
Deep Diffuser
Oak Harbor
Limited Shellfish Impact
West Beach
Mitigate Shellfish Impact With
Deep Diffuser
Oh910i1-8594.pptx/41

42. Effluent Conveyance, Beachview Farm
Oh910i1-8594.pptx/42

43. Effluent Conveyance, Crescent Harbor N.
Oh910i1-8594.pptx/43

44. Confirmation of Outfall Location
December 22, 2011 Project Report
Potential WWTP Sites Beachview Farm Crescent Harbor
Potential Outfall Locations West Beach Oak Harbor Crescent Harbor Oak Harbor
Pipeline to Shoreline $2,100,000 $5,200,000(3) $4,900,000(3) $4,900,000(3)
In-Water Work(2) $3,700,000 $2,900,000 $3,700,000 $2,900,000
Natural Resource Damage
$10,600,000 -- $7,600,000 --
Fees
Total Estimated Cost $16,400,000 $8,100,000 $16,200,000 $7,800,000
Notes:
1. Costs include sales tax, contingency and soft costs.
2. Estimated cost of a near-shore outfall.
3. Includes the cost of an effluent pump station.
Oh910i1-8594.pptx/44

45. Effluent Conveyance/Outfall Cost Summary
$9
Effluent Pipeline In-Water Work
$8
$7
$6
Project Cost, Millions
$5
$4
$3
$2
$1
$0
Windjammer Crescent Harbor Crescent Harbor Old City Shops Beachview Farm Marina Sea
North Plane
Oh910i1-8594.pptx/45

46. Summary of Overall Project Costs
Oh910i1-8594.pptx/46

47. Project Cost Summary for Year 2030
MBR Process at All Sites
$100
$90
$80
$70
Project Cost, Millions
Effluent Pipeline
$60
In water work
$50
Sewage Conveyance -
$40 Ultimate
Sewage Conveyance -
$30 Initial
WWTP - Site
$20
WWTP - Solids
$10 WWTP - Liquids
$0
Windjammer Old City Crescent Crescent Marina / Sea Beachview
Shops Harbor Harbor Plane Farm
North
Oh910i1-8594.pptx/47

48. Project Phasing Considerations
Oh910i1-8594.pptx/48

49. Projects are “phased-in” over time in several
ways…
• Phase-in WWTP capacity
– Design for lower flows/loads now; expand to meet
higher flows/loads in the future
• Phase-in WWTP components
– Build new liquid stream now; defer solids treatment
(i.e. continue to use existing Seaplane Base Lagoon)
• Phase-in WWTP “performance”
– Design for less restrictive permit limits now;
expand to meet more restrictive limits in the future
• Phase-in wastewater conveyance
– “Just-in-time” installation/expansion of pipes/pumps
for wastewater
Oh910i1-8594.pptx/49

50. Example of Capacity Phasing (MBR or AS)
6.0
5.5
5.0
Max. Monthly Flow (mgd)
4.5
2030 Projection
4.0
3.5
3.0
Phasing Approach:
CURRENT
2.5 Assume slower growth rate
Construct smaller Phase 1 WWTP
2.0
2000 2005 2010 2015 2020 2025 2030 2035 2040 2045 2050 2055 2060 2065
Oh910i1-8594.pptx/50

51. Example of Component Phasing (MBR or AS)
8 4
9 4 4
2 7
6
10 1 9 7 7 8
NOTE: Phasing Approach:
Elements 3 & 5 only apply to AS alternative
Defer construction of new solids treatment
Continue to use Seaplane Lagoon for interim
solids treatment
Oh910i1-8594.pptx/51

52. Example of “Performance” Phasing (AS)
(F)
(F)
Phasing Approach:
Design Phase 1 for “Conventional” Permit
(No Nitrogen Removal, no “Class A” Reclaimed Water)
Oh910i1-8594.pptx/52

53. Example of Conveyance Phasing (Windjammer)
Oh910i1-8594.pptx/53

54. Example of Conveyance Phasing (Windjammer)
Oh910i1-8594.pptx/54

55. Phased Conveyance Costs for Each Site
$16
Long-Term Initial Phase
$14
$12
Project Costs, Millions
$10
$8
$6
$4
$2
$0
Windjammer Crescent HarborCrescent Harbor Old City Shops Beachview Farm Marina / Sea
North Plane
Oh910i1-8594.pptx/55

56. Phasing Opportunities Differ from Site to Site
Windjammer (Component + Conveyance)
$100
$90
$80
$70
Project Cost, Millions
Effluent Pipeline
$60 In water work
Sewage Conveyance - Ultimate
$50
Sewage Conveyance - Initial
WWTP - Site
$40
WWTP - Solids
$30 WWTP - Liquids
$20
$10
$0
Windjammer Windjammer Phase 1
Oh910i1-8594.pptx/56

57. Phasing Opportunities Differ from Site to Site
Crescent Harbor North (“Performance” + Conveyance)
$100
$90
$80
$70
Project Cost, Millions
Effluent Pipeline
$60
In water work
$50 Sewage Conveyance - Ultimate
Sewage Conveyance - Initial
$40 WWTP - Site
WWTP - Solids
$30
WWTP - Liquids
$20
$10
$0
Crescent Harbor North Crescent Harbor North Crescent Harbor North
AS AS 30/30 w/o "Class A"
Oh910i1-8594.pptx/57

58. Project Cost Summary for Potential “Phase 1”
$100
$90
$80
$70
Project Cost, Millions
$60 Effluent Pipeline
In water work
$50
Sewage Conveyance -
$40 Initial
WWTP - Site
$30
WWTP - Solids
$20
WWTP - Liquid
$10
$0
Windjammer Beachview Crescent Crescent Old City Marina / Sea
MBR Farm Harbor Harbor Shops Plane
AS AS
North AS MBR MBR
Oh910i1-8594.pptx/58

59. Summary and Recommendation
Oh910i1-8594.pptx/59

60. City Council Direction
Resolution 12-05: February 7, 2012
Report back with the following information…
1. A 6th site (Crescent Harbor North) compares well with
other candidate sites
2. Windjammer and Crescent Harbor North provide the
lowest combination of initial/long-term cost
3. Using an AS processes at Crescent Harbor North is
required to reduce initial and long-term cost
4. An outfall into Oak Harbor Bay provides adequate
mixing and is the lowest cost option for all sites
5. Additional public input collected tonight will be
included in the final site selection process
Oh910i1-8594.pptx/60

61. Recommended Alternatives
April 17, 2012 City Council Meeting
1. Consider two sites for further evaluation:
– Windjammer Park
– Crescent Harbor North
2. Develop final alternatives around membrane
bioreactor (MBR) process
– Consider AS at Crescent Harbor North
3. Discharge treated effluent through new outfall into
Oak Harbor Bay
– Evaluate opportunities for beneficial reuse
Oh910i1-8594.pptx/61

62. Full TBL+ Summary of Sites/Alternatives
Project Through Year 2030
MBR at all Site
E3
E2
No. of TBL+ Objectives Met
E1 E2
S3 E1 E2 E2 E2
S2 S3 E1 E1 E1
S1 S2 S3 S1 S2 E2
F3 S1 S2 F3 S1 E1
F2 F3 S1 F2 F2 S3 E2
F1 F2 F3 F1 F1 S2 E1
T3 F1 F2 T3 T3 S1 S1
T2 T2 F1 T2 T2 F3 F3
T1 T1 T1 T1 T1 T1 T1
Ideal Crescent Crescent Windjammer Old City Beachview Marina /
Alternative Harbor North Harbor Shops Farm Seaplane
Base
Oh910i1-8594.pptx/62

63. Project Cost Summary
Potential Phase 1 and Year 2030
$100
Ultimate Phase 1
$95
$90
$85
$80
$75
$70
$65
$60
Windjammer (MBR)
Beachview Farm (AS) Harbor Crescent Harbor (AS) Shops (MBR)
Crescent N. (AS) Old City Marina/Sea Plan (MBR)
Oh910i1-8594.pptx/63

64. Final Thoughts
Our recommendation is based on the following
key points:
• Windjammer MBR
– Best opportunity to complete an initial phase below $70M
target while controlling long-term cost
– Highest quality water for current and future environmental
protection
– Required to justify decision to use more expensive
alternative
• Crescent Harbor North AS
– Meets all “Social” objectives for the Project
– Very close to the lowest Phase 1 / Ultimate cost
– Straight forward site acquisition and permitting
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65. Questions?
Oh910i1-8594.pptx/65