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S BAST
HOME OF PELICAN ISLAND
Council Meeting Date:
Agenda Item Title:
Recommendation:
CITY COUNCIL AGENDA TRANSMITTAL FORM
26 August 2015
Seawall Engineering Assessment
Consider Hoyle Tanner Seawall Engineering Assessment.
Background: On 13 May 2015, Council directed the City Manager to
execute a contract with Hoyle, Tanner & Associates to conduct
an engineering assessment of the existing bulkhead/seawalls
along the City canal and waterway system. That assessment
has been completed. A representative from Hoyle Tanner will
be making a presentation to Council. Attachment 1 is a
narrative of the assessment complete with spreadsheet
Appendix. Because of the volume of information, the multiple
appendices are not included in Attachment 1. That information
will be available in the City Clerk's office for reference
purposes. Attachment 2 is the presentation to be made by the
Hoyle Tanner representative.
If Agenda Item Requires Expenditure of Funds: N/A
Administrative Services Department Review:
Attachments: 1. COS Seawall Assessment 1
2. COS Seawall Assessment Presentation
City Manager Authorization -
/A" .
Date: 19 August 2015
ATTACHMENT I
THE CITY OF SEBASTIAN
SEAWALL ASSESSMENT
UNDER SEPARATE COVER
ATTACHMENT 2
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Existing Seawall Materials
Breakdown of Seawall Material
Type of Material Used
Percentage
No Seawall (Only Earth Berm)
37.54%
Concrete/Transite
30.29%
Metal/Metal
27.81%
Concrete/Metal
2.16%
Rip Rap Bags at Waterline
1.68%
Concrete/Vinyl
0.26%
Wood Seawall
0.13%
Wood Pilings
0.13%
Wood/Metal
0.13%
2.16%
27.81% 37.54%
30.29%
■ No Seawall .., Concrete/Transite ■ Metal/Metal ■ Concrete/Metal ■ Rip Rap Bags
r Concrete/Vinyl a Wood Seawall ■ Wood Pilings ■ Wood/Metal
Hoyle,Tanner
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Condition
Overall Condition Ratings of Seawalls
Rating
Percentage
Remedial Action
Needed
Failing
2.96%
0-2 years
Poor
4.94%
2-4 years
Fair
37.78%
4-10 years
Satisfactory
27.16%
10-15 years
Good
27.16%
15-20 years
,4 i
27.16%
37.78%
27.16%
Failing ■ Poor ■ Fair ■ Satisfactory ■Good
Hoyle,Tanner
Condition
Parcels Listed as "Failing"
Map No.
Address
Rating
1
243 Joy Haven Drive
1*
2
443 Joy Haven Drive
1*
3
1119 George Street
2
4
1137 George Street
2
5
1179 George Street
2
6
1261 George Street
2
7
862 Schumann Drive
2
8
868 Schumann Drive
2
9
874 Schumann Drive
2
10
Confidential (Bailey Drive)
2
11
807 Bailey Drive
2
12
819 Bailey Drive
2
* City research/survey shows that seawalls
associated with these properties located on
private property
Hoylejanner
Conclusion — Remedial Options
1. A new vinyl seawall is built in front of the existing seawall.
2. The existing seawall is replaced with a new vinyl seawall.
3. The soil is dredged and refilled over the existing seawall.
Estimated Cost Projections for each Option by Year of Suggested Completion
Year
Options
1
2
3
2017
$456,178.00
$738,688.00
$429,344.00
2019
$662,230.75
$1,151,305.00
$623,276.00
2025
$5,922,064.75
$10,411,249.00
$5,573,708.00
2030
$4,187,469.75
$5,811,927.00
$3,941,148.00
2035
$4,610,829.25
$5,689,879.00
$4,339,604.00
Total Cost
$15,838,722.50
$23,803,048.00
$14,907,080.00
* Costs based on evaluation of the entire waterway system
Hoylejanner
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