60% Cost Estimate Preview as presented to the Oak Harbor City Council at a Council Workshop on Sept. 30, 2015.

1. Clean Water Facility
60% Cost Estimate Preview
9/23/2015
City Council Workshop

2. • Only at 60% design
• More detail will be provided on September 30th
• This is a high level introduction for the workshop
• Things to keep in mind
• An estimate is not a bid!
• The project team has the rate payer in mind
Introduction
9/23/2015City Council Workshop 2

3. • GC/CM vs. Engineering Estimates
• What’s included in the cost estimate?
• 60% Cost Estimate
• Third Party Review
• What’s Next?
Agenda
9/23/2015City Council Workshop 3

4. • 60% Engineers estimate provides a probable range of cost
• -5% to +15%
• GC/CM provide opinion of cost for a Guaranteed Maximum Price.
• Conservative escalation factors, allowances and contingencies
“Budget Number”
• Think of these numbers as the “Bookends” of potential
construction costs
• Estimate is not a bid!
GC/CM Opinion of Cost vs.
Engineers Estimate
9/23/2015City Council Workshop 4

5. • Only what’s inside the box
• Construction Only
• Does not include the
splash park!
What’s included in
the
Opinion of Cost?
9/23/2015City Council Workshop 5

6. 60% Cost Estimate
$98M
$113M
$91M
$110M
$60M
$70M
$80M
$90M
$100M
$110M
$120M
Carollo Hoffman
30% 30%60% 60%
9/23/2015City Council Workshop 6

7. • Independent cost review of both estimates
• Concrete
• Mechanical
• Contingency Factors
• Construction Overhead Cost
• Landscaping / Architectural
Third Party Review
9/23/2015City Council Workshop 7

8. • Workshop September 30th
• Continue seeking cost savings
• Use information gathered from 60% to improve
90% design
• Work with our project team to develop a bidding
strategy
What’s next
9/23/2015City Council Workshop 8

9. • We have more work to do!
• There are more opportunities for cost savings
• We have a great team! (City, Carollo, Hoffman,
OAC, KBA…)
• The bid price is the ultimate determination of cost!
Summary
9/23/2015City Council Workshop 9

10. • 60% Design Cost Estimate
• Bio-solids Alternatives
• Community Room Options
• Funding and Rates
Agenda for September 30th
9/23/2015City Council Workshop 10

11. 9/23/2015City Council Workshop 11