Public Notice – Duckbill Valves





The Federal Emergency Management Agency and Florida Division of Emergency Management have received the following application for Federal grant funding.  Final notice is hereby given of the Federal Emergency Management Agency’s (FEMA) consideration to provide funding in the form of Hazard Mitigation Grant Program. Funds will be provided in accordance with Section 404 of the Robert T. Stafford Disaster Relief and Emergency Assistance Act, Public Law 93-288, as amended.


Under the National Environmental Policy Act (NEPA), federal actions must be reviewed and evaluated for feasible alternatives and for social, economic, historic, environmental, legal, and safety considerations. Under Executive Order (EO) 11988 and EO 11990 FEMA is required to consider alternatives to and to provide public notice of any proposed actions in or affecting floodplains or wetlands. EO 12898 also requires FEMA to provide the opportunity for public participation in the planning process and to consider potential impacts to minority or low-income populations.


Funding for the proposed project will be conditional upon compliance with all applicable federal, tribal, state and local laws, regulations, floodplain standards, permit requirements and conditions.



The City of Holly Hill


Project Title:

HMGP-4283-119 R Volusia County, City of Holly Hill, Duckbill Valves, Drainage


Location of Proposed Work:

The area affected by this project consists of homes in the following locations:


All storm water pipes to be fitted with duckbills are located along Riverside Drive which runs along the Atlantic Intracoastal Waterway. The locations of these outfalls stretch from the north side of the City just north of Granada Street and extend south to 231 Riverside Drive.


Proposed Work and Purpose:

Detailed Project Description:


The City of Holly Hill has 29 drainage outfalls into the Intracoastal Waterway. During periods of heavy rain, storm surge and strong winds, these outfalls end up under water. This causes drainage pipes to be filled with brackish water, creating an environment where storm water cannot properly drain to the river. In addition, the brackish water from the waterway can back up into communities. The combination of these events is a major cause to flooding both in structures throughout the City of Holly Hill as well as in roadways throughout the City.


The City of Holly Hill proposes to install checkmate valves on pipes nearest 23 of the City’s 29 outfalls into the river. The additional 6 outfalls are owned either by other jurisdictions or privately. These valves act as backflow preventers where water can only travel in one direction. In this case, water will be permitted to exit drainage pipes into the river but water from the river will be unable to travel back through drainage pipes into communities. In addition to preventing river water from flooding properties directly by traveling up drainage pipes, not allowing river waters into drainage pipes creates an environment where stormwater runoff will more easily be able to travel through pipes as the pressure of waters travelling in the other direction in the pipes will be eliminated. This safeguard is anticipated to minimize the occurrence of flooding throughout the City, reduce the length and severity of any flooding conditions that do occur and minimize salt water intrusion.


The City of Holly Hill proposes to have 23 duckbill valves installed on drainage pipes through manholes and storm basins closest to the corresponding outfalls into the Halifax River. Forced labor will install checkmate valves on a total of 17 pipes less than 24″ in diameter. For the remaining 6 pipes greater than 24″, an outside contractor will be required to perform this work. There will be minimal excavation performed for this work, so site restroration, if any, will be minimal. 


Project Alternatives:

The alternatives to the project that have been and will be considered are 1) no action alternative and 2) The installation of pump station and backflow gate at the LPGA canal, a pump structure and canal connection at Granada Street and a pump structure and canal connection between 2nd and 3rd Street at Riverside Drive.  These alternatives to the proposed project are not viable because under Alternative 1) repetitive flooding is not alleviated and the needs of the community would not be served; and Alternative 2) this alternative is anticipated to work well, but has an estimated cost of $9,137,254.00 and as such, is cost prohibitive and therefore not practicable. The estimated cost of the proposed duckbill valve project is: $167,970.00.


Comment Period:

Comments are solicited from the public; local, state or federal agencies; and other interested parties in order to consider and evaluate the impacts of the proposed project.  The comments should be made in writing and addressed to the Florida Division of Emergency Management, Bureau of Recovery and Mitigation, 2555 Shumard Oak Blvd., Tallahassee, FL 32399-2100.  These are due within 30 days of this notice (or the actual date).  The State will forward comments to applicable regulatory agencies as needed.  Interested persons may submit comments, obtain more detailed information about the proposed action, or request a copy of the findings by contacting:


Steven Juengst, Facilities Supervisor                                                          (386) 248-9463

City of Holly Hill                                                                                



Teresa Sanders, State Environmental Specialist                                        (850) 815-8521

Florida Division of Emergency Management                                   

Categories News & Announcements | Tags: | Posted on October 4, 2017

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