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
•
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/3
4. Steps Completed Following Council Direction
Report to Council on April 17, 2012
•
–
•
•
–
•
•
–
•
•
•
Oh910i1-8594.pptx/4
7. Planning Charrette, Christensen Design Mgmt
June 27 & 28, 2012
Participants; (Non City/Consultants)
David Acton, Ratepayer
Corky Bridgeford, Property owner
Mike Horrobin, Property owner
Gray Giordan, Waterside condos
Joanne & Russ Hartley, Property Owners
John Koetje, Ratepayer
Robyn Kolaitis, Ratepayer
Jill Johnson, Chamber of Commerce
Bruce Neil, Planning Commission
Sean Rafferty, Ratepayer
Daisy Sapida, Parks Board
Dale Smith, Whidbey Island Bank
Jeff Trumbore, Ratepayer
Ken Tyler, North Whidbey Little League
Oh910i1-8594.pptx/7
12. Windjammer Charrette Concept
Conceptual Perspective View
Street view looking North from park past future re-aligned
Bayshore Drive
Oh910i1-8594.pptx/12
15. Crescent Harbor North Charrette Concept
Conceptual Plan View for Activated Sludge (AS)
Oh910i1-8594.pptx/15
16. Crescent Harbor North Charrette Concept
Conceptual Site Section View for AS
Oh910i1-8594.pptx/16
17. Crescent Harbor North Charrette Concept
Conceptual Plan View for MBR
Oh910i1-8594.pptx/17
18. Crescent Harbor North Charrette Concept
Conceptual Perspective View (AS or MBR)
Street view looking Northeast from Torpedo Road
Oh910i1-8594.pptx/18
20. Level of Detail for MBR WWTP
April 2012
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/20
21. Basis of MBR Construction Cost Estimate
April 2012
$90
Site Solids Liquid
Process Element MBR
$80 $80.4 M
$70
1. Equalization $0.5
WWTP Project Costs
$60
2. Headworks $5.0 $50
$40
3. Primary Treatment -- $30
4. Secondary Treatment $10.1 $20
$10
5. Tertiary Treatment -- $0
Windjammer Park Crescent Harbor Crescent Harbor Old City Shops Beachview Farm Marina / Sea
6. Disinfection $2.2 North Plane Base
7. Solids Handling $4.2 Cost Component MBR
8. Odor Control $3.0 Total Direct Costs $31.3
9. Admin/Mnt $2.3 Indirect Costs (GCs, OH&P) $11.2
10. Site Work $4.0 Subtotal $42.5
Total Direct Costs $31.3 Sales Tax (8.7%) $3.7
Subtotal $46.2
Contingency (30%) $13.8
Oh910i1-8594.pptx/21
Total Construction Costs $60.0
22. Project Cost Comparison for Year 2030
Windjammer MBR Facility
$100 Effluent Discharge
Sewage Conveyance
$95
$90.9 M WWTP
$90 $2.9
$85 Conveyance/Discharge
Project Cost, Millions
$7.6
Added to WWTP costs
$80 No Change (not site specific)
$75
$70
$65 $80.4 WWTP
Updated to reflect charrette
$60
$55
$50
Apr-12
Oh910i1-8594.pptx/22
23. Windjammer Charrette Concept
Conceptual Plan View
Allowance for land
acquisition of
commercial frontage
Site construction cost
increases including
service road, runoff, etc.
Aeration basin cost
increased to reflect
placement beneath road
Oh910i1-8594.pptx/23
24. Project Cost Comparison for Year 2030
Windjammer MBR Facility
$100
Effluent Discharge
Sewage Conveyance
$95 $93.5 M
$90.9 M WWTP
$2.9
$90 $2.9
$7.6
$85 •
Project Cost, Millions
$7.6
$2.6 M
$80
$75
•
$70 •
$83.0
$65 $80.4
•
$60
$55 •
$50
•
Apr-12 Updated
Oh910i1-8594.pptx/24
25. Project Cost Comparison for Year 2030
Crescent Harbor North AS Facility
$100
Effluent Discharge
$95 Sewage Conveyance
$91.1 M WWTP
$90
$89.0 M
$7.9
$85 $7.9
Project Cost, Millions
•
$80
$11.3
$75 $11.3 •
$70
$2.1 M
$65 •
•
$60 $71.9
$69.8
$55
$50
Apr-12 Updated
Oh910i1-8594.pptx/25
26. Summary of Revised Project Costs
Year 2030
$100
Effluent Discharge
$95 $93.5 M Sewage Conveyance
$2.9 WWTP
$90 $89.0 M
$7.6
$85 $7.9
Project Cost, Millions
$80
$75 $11.3
$70
$83.0
$65
$60 $69.8
$55
$50
Windjammer MBR Crescent Harbor North AS Crescent Harbor North MBR
Oh910i1-8594.pptx/26
27. Cost of an MBR Facility Differs By Site
Windjammer Vicinity Crescent Harbor N
Influent Pump Station $880,000 $--
Aeration Basins $6,000,000 $3,200,000
Influent/Effluent Routing $400,000 $--
Sitework/Yard Piping $1,750,000 $3,000,000
Premium Geotechnical $1,250,000 $375,000
Premium Architecture $1,400,000 $270,000
Direct Cost Subtotal $11,680,000 $6,845,000
Construction Cost(1) $20,250,000 $12,308,000
Land Acquisition(2) $2,075,000 $1,300,000
Project Cost(3) $22,325,000 $13,608,000
NOTES:
(1) Includes 25% contingency, Contractor markups, and Sales Tax.
(2) Allowance based on assessed value.
(2) Total of Construction plus Land Acquisition.
Oh910i1-8594.pptx/27
28. Summary of Revised Project Costs
Year 2030
$100
WWTP Sewage Conveyance Effluent Discharge
$95 $93.5 M $93.5 M
$2.9
$90 $89.0 M $7.9
$7.6
$85 $7.9
Project Cost, Millions
Higher
$80 $11.3
$75 $11.3
$70
$83.0
$65
$74.3 Lower
$60 $69.8
$55
$50
Windjammer MBR Crescent Harbor North AS Crescent Harbor North MBR
Oh910i1-8594.pptx/28
31. Phasing Potential differs for each, which reflects in
the estimated cost.
Windjammer Crescent Harbor N Crescent Harbor N
Phasing Option
MBR AS MBR
Capacity(1)
Component
Performance
Conveyance
Overall
Est. Phase 1 Cost(1) $74.2 $75.2 $90.7
NOTE:
(1) Current estimates do not include capacity phasing, which can be considered at all sites.
Highest Potential Moderate Potential Lowest Potential
Oh910i1-8594.pptx/31
32. Phasing Risk differs for each, which does not
reflect in the estimated cost.
Windjammer Crescent Harbor N Crescent Harbor N
Phasing Option MBR AS MBR
Low Risk Low Risk Low Risk
Capacity
(City Controlled) (City Controlled) (City Controlled)
Higher Risk
Component N/A N/A
(Not City Controlled)
Moderate Risk
Performance N/A N/A
(Not City Controlled)
Low Risk
Conveyance N/A N/A
(City Controlled)
Overall Risk of Not
Being Able to Higher Moderate Low
Phase
Oh910i1-8594.pptx/32
37. 2010 Wastewater Rate Study Average Single-Family Monthly Bill - Projected Rate Increases
Year 1 Year 2 Year 3 Year 4 Year 5 Year 6 Year 7 Year 8 Year 9
$40 Million $40.00 $42.00 $44.10 $47.65 $51.45 $55.55 $61.10 $67.20 $73.90
$50 Million $40.00 $42.00 $45.15 $49.20 $53.65 $59.00 $64.90 $71.40 $78.55
$60 Million $40.00 $42.00 $45.55 $50.35 $55.65 $61.50 $67.95 $75.10 $83.00
$70 Million $40.00 $42.00 $47.00 $52.00 $57.50 $64.75 $72.85 $81.95 $92.20
$80 Million $40.00 $42.00 $47.00 $52.00 $58.50 $67.25 $77.35 $88.95 $102.30
$90 Million $40.00 $42.00 $47.00 $52.65 $60.55 $69.65 $80.10 $96.10 $115.30
$95 Million $40.00 $42.00 $47.00 $52.65 $60.55 $71.15 $83.60 $100.30 $120.35
$100 Million $40.00 $42.00 $47.00 $54.05 $62.15 $73.05 $85.85 $103.00 $123.60
$140.00
$120.00
$100.00
$40 Million
$50 Million
$80.00 $60 Million
$70 Million
$60.00 $80 Million
$90 Million
$95 Million
$40.00
$100 Million
$20.00
$0.00
Year 1 Year 2 Year 3 Year 4 Year 5 Year 6 Year 7 Year 8 Year 9
Oh910i1-8594.pptx/37
38. Estimated Average Single Family Monthly Rate
No Phasing, Crescent Harbor North MBR
Current Assumption
$110
$100
$90
$80
$70
$60
$50
$40
Year 1 Year 2 Year 3 Year 4 Year 5 Year 6 Year 7 Year 8 Year 9
Oh910i1-8594.pptx/38
39. Estimated Average Single Family Monthly Rate
No Phasing, Crescent Harbor North MBR
Current Assumption
$110
No Phasing (CHN MBR)
$100
$90
$80
$70
$60
$50
$40
Year 1 Year 2 Year 3 Year 4 Year 5 Year 6 Year 7 Year 8 Year 9
Oh910i1-8594.pptx/39
40. Estimated Average Single Family Monthly Rate
Phasing, Windjammer MBR, Crescent Harbor North AS
Current Assumption
$110
No Phasing (CHN MBR)
$100
Phasing (Windjammer MBR, CHN AS)
$90
Range in
Rates
$80
$70
Capacity
Phasing
$60
$50
$40
Year 1 Year 2 Year 3 Year 4 Year 5 Year 6 Year 7 Year 8 Year 9
Oh910i1-8594.pptx/40
42. Final Summary and Comparison of Alternatives
Crescent Harbor Crescent Harbor
Consideration Windjammer MBR North AS North MBR
TBL+ Rating Similar (High) Similar (High) Similar (High)
Estimated
$93.5 million $88.9 million $93.5 million
Long-term Cost
Moderate potential for Highest potential for Highest potential for
Rate Impact
rates on low end of rates on low end of rates on high end of
(Range as shown)
range range range
Potential benefits to Potential benefits to Potential benefits to
Community Benefit Windjammer Vicinity regional utility regional utility
(Charrette Feedback) open space and services and services and
transportation transportation transportation
Oh910i1-8594.pptx/42
45. Schedule - Council Actions & Deadlines
Jul 31, 2012 Q&A regarding additional evaluation per
Resolution 12-10
Aug 14, 2012 Council resolution on proposed site for
further planning and environmental review
Oct 16, 2012 Council resolution on proposed phasing
plan
Dec 31, 2012 Required Facilities Plan submission to
Washington Department of Ecology
Dec 31, 2014 Required engineering design submission
to Washington Department of Ecology
Oh910i1-8594.pptx/45
