Agenda 03/27/2018 Item #16A1403/27/2018
EXECUTIVE SUMMARY
Recommendation to approve the findings of the Flood Protection Level of Service Study by the
South Florida Water Management District as per the Cooperative Agreement.
OBJECTIVE: That the Board of County Commissioners (Board) approve the findings, as
summarized, of the Flood Protection Level of Service study performed by the South Florida Water
Management District (SFWMD) for the primary flood control system within Collier County.
CONSIDERATION: At the July 15, 2015 meeting, the Big Cypress Basin Board authorized staff to
initiate a Flood Protection Level of Service Assessment of the primary flood control system
comprising canals and structures in the major watersheds of Big Cypress Basin. The objective of the
study was to evaluate the performance of the water management system under current and future
conditions and help prioritize capital investments and identify areas within the Big Cypress Basin that
may need increased flood protection. SFWMD staff has worked closely with County St aff to ensure
that the study and findings are consistent with the Growth Management Plan.
The Big Cypress Basin (BCB) Flood Protection Level of Service Study examines the County’s
primary flood protection system for areas managed by the Big Cypress Basin , specifically, the
Cocohatchee canal system, the Golden Gate canal system, the Belle Meade - Henderson Creek canal
system and the Faka Union canal system (see figure). The study, funded by the Big Cypress Basin
Board, is scheduled for completion in March 2018.
The study has two parts: 1) evaluate the current level of flood protection provided by the primary
flood control system, and 2) examine changes in level of flood protection under projected future
(2065) conditions including land use development and sea level rise. The study findings will be used
to support the BCB Capital Program and Strategic Planning efforts by identifying under -performing
canal reaches and the long-term needs of the primary canals and structures.
Future land use was based on the 2065 population-density estimates from Collier County’s Interactive
Growth Model. Future sea level projections for 2065 were based on unified sea level rise projections
from the Southeast Florida Regional Climate Change Compact. The effects of tide and storm surge
were superimposed on sea level rise projections in the analysis. Sea level effects on groundwater
were also incorporated in the analysis.
SUMMARY OF FINDINGS: The existing level of service for the primary flood control system
can handle a 10-year 3-day design storm. Some areas of the system could handle a 25-year 3-day
design storm, but some areas would come out of bank without future improvements.
Under the future condition model with build-out in 2065, areas that could be of concern with future
development include:
· Golden gate Estates upstream of GG4
· Areas upstream of COCO3
· Corkscrew watershed area
· Henderson Creek watershed near the main outfall by US41
Sea Level rise of one foot will diminish the flood protection le vel of service in the Henderson
Creek/Belle Meade system.
In acknowledgement of these findings, staff from Collier County and the South Florida Water
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Management District/Big Cypress Basin will continue to explore projects and solutions that
incorporate the natural environment, including utilization and optimization of dispersed water storage
areas, flow ways and low- impact development strategies, etc.
The dedicated funding provided by the proposed Stormwater Utility will create a mechanism to
incentivize these types of watershed-scale initiatives, including options for individual, single-family
development.
Based on this study and findings, the Basin Board will be considering their revised 5-year CIP and
will be submitting it as part of their annual update and approval to re-prioritize projects to address
areas where flood control could be improved.
FISCAL IMPACT: There is no fiscal impact related to this request. However, as provided above,
the County and the SFWMD/BCB will continue to coordinate and evaluate capital projects for
potential inclusion in their respective capital programs.
GROWTH MANAGEMENT IMPACT: This request is consistent with the goals, objectives and
policies of the Stormwater Management Sub-Element of the Collier County Growth Management
Plan.
LEGAL CONSIDERATIONS: This item has been reviewed by the County Attorney, raises
no legal issue, and requires majority support for acceptance of the report. -JAK
RECOMMENDATION: To accept the Level of Service Study findings for the primary flood control
system.
Prepared by: Akin Owasina, Bureau Chief of Hydrology and Hydraulics,
South Florida Water Management District
Amy Patterson, Director, Capital Project Planning, Impact Fees
And Program Management, Growth Management Department
ATTACHMENT(S)
1. BCB LOS MAP (PDF)
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COLLIER COUNTY
Board of County Commissioners
Item Number: 16.A.14
Doc ID: 5031
Item Summary: Recommendation to approve the findings of the Flood Protection Level of
Service Study by the South Florida Water Management District as per the Cooperative Agreement.
Meeting Date: 03/27/2018
Prepared by:
Title: Senior Grants and Housing Coordinator – Capital Project Planning, Impact Fees, and Program
Management
Name: Gino Santabarbara
03/06/2018 9:02 AM
Submitted by:
Title: Division Director - IF, CPP & PM – Capital Project Planning, Impact Fees, and Program
Management
Name: Amy Patterson
03/06/2018 9:02 AM
Approved By:
Review:
Capital Project Planning, Impact Fees, and Program Management Gerald Kurtz Additional Reviewer Completed 03/06/2018 1:12 PM
Capital Project Planning, Impact Fees, and Program Management Amy Patterson Additional Reviewer Completed 03/07/2018 9:04 AM
Growth Management Department Jeanne Marcella Level 1 Reviewer Completed 03/07/2018 11:08 AM
Growth Management Department Thaddeus Cohen Department Head Review Completed 03/07/2018 12:23 PM
Growth Management Department James French Deputy Department Head Review Completed 03/07/2018 2:35 PM
County Attorney's Office Jeffrey A. Klatzkow Level 3 County Attorney's Office Review Completed 03/07/2018 3:36 PM
Office of Management and Budget Valerie Fleming Level 3 OMB Gatekeeper Review Completed 03/08/2018 2:06 PM
Budget and Management Office Mark Isackson Additional Reviewer Completed 03/08/2018 2:42 PM
County Manager's Office Nick Casalanguida Level 4 County Manager Review Completed 03/18/2018 11:31 AM
Board of County Commissioners MaryJo Brock Meeting Pending 03/27/2018 9:00 AM
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EXHIBIT I
Watershed, Canals and Structures of the Big Cypress Basin System
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Packet Pg. 691 Attachment: BCB LOS MAP (5031 : Flood Protection Level of Service Study)