Mayport seawall and bulkhead planning
Mayport sits at the mouth of the St. Johns. It has the largest tides in Duval, strong currents and the highest water level on the local record.
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Get to know your waterfront
Mayport village sits where the St. Johns River meets the Atlantic and the Intracoastal Waterway. NOAA’s Mayport gauge shows a daily range of about 5 feet, and the city’s flood map puts the village waterfront park in zone AE with a base flood elevation of 8 feet NAVD88, the highest of the Jacksonville neighborhoods in this guide.
NOAA Tides & Currents datums, Mayport (Bar Pilots Dock) · Representative coordinates: Mayport village
Tall tidal band, strong currents
Nicole peaked at 3.58 feet above normal high water at the Mayport gauge, above the 3.3-foot major flood level and higher than Matthew. With about 5 feet of daily tide, a tall band of wall wets and dries every day; that is where steel corrodes fastest and borers attack timber. Post Tropical Cyclone Report: Hurricane Nicole (PSHJAX) · UFM 4-150-07 Waterfront Facilities: Operation and Maintenance
The Army Corps has described strong ebb-tide crosscurrents where the river meets the Intracoastal near Mile Point. Ask designers how scour at the toe is handled. Mile Point study meets with approval, support
The river in front of Mayport tests as Timucuan Outstanding Florida Water in state map data, which can mean stricter review for structures over the water. FDEP Outstanding Florida Waters (OpenData) point query
City projects
- Mayport Docks Redevelopment covers about 1,300 feet of public riverfront; Phase 1 is complete and Phase 2 is in design.
- The city replaced the failing bulkhead at the Oak Harbor boat ramp on Seaway Street.
What could the work cost?
Corrosion protection, toe protection and taller caps all add cost at the river mouth.
Published prices are attributed planning context from contractors’ own pages, not a measured Jacksonville average or this website’s quote. Ranges differ about five-fold between publishers; your written, itemized scope decides the real number.
Compare quotes and plan a budget →Find the relevant permits and records
| Starting point | What to resolve | Prepare and look up |
|---|---|---|
City of Jacksonville Building Inspection Division | Building permit through JaxEPICS after zoning, drainage and any flood or historic review; inspections. | Signed and sealed drawings, survey and site plan as unlocked PDFs. 214 N. Hogan St.; 904-255-8500. |
Florida DEP Northeast District (Jacksonville) | State environmental resource permit or exemption, and state-lands consent for work at or below the high-water line. DEP handles single-family docks and shore protection not tied to a larger development. | Survey with the existing wall face and high-water line, the proposed alignment and photos. DEP Northeast District: 904-256-1700. |
U.S. Army Corps of Engineers, Jacksonville District | Federal authorization for work in tidal and navigable waters, often verified by DEP through the state programmatic general permit or covered by a nationwide permit. | Ask DEP whether its review includes federal verification for your scope, or which nationwide permit applies. |
A Mayport checklist
Use these steps to prepare.
Pull your permit and parcel history
Search past permits in JaxEPICS (guest sign-in) and look up your parcel with the Duval County Property Appraiser before the assessment.
Services Provided: Violation or Permit Record Search · Duval County Property Appraiser
Ask for your flood zone and elevation certificate
The city’s floodplain coordinator (904-255-8366) provides flood zone determinations and copies of available elevation certificates.
Inspect at low tide
Ask the assessor to see the full tidal band, including the zone just below low water.
UFM 4-150-07 Waterfront Facilities: Operation and Maintenance · NOAA Tides & Currents datums, Mayport (Bar Pilots Dock)
Plan your Mayport seawall project
Tell us where your Mayport property is, what you have noticed and what you want to decide. We will help you plan the next step.
Local guidance. A clearer plan for your waterfront.
Mayport project questions
What is the highest water recorded at Mayport?
The 1898 hurricane leads the historic list, but Nicole in November 2022 set the highest water level in NOAA’s modern Mayport record.
St. Johns River at Mayport (MYPF1) · Mayport 8720218 datums (max observed)
Keep planning
Nearby waterfront guides
Fort George Island & Northside Marshes, Atlantic Beach, Arlington
Show sourcesHide sources
- NOAA Tides & Currents datums, Mayport (Bar Pilots Dock)Source reviewed 2026-10-24
- Representative coordinates: Mayport villageSource reviewed 2026-10-24
- Post Tropical Cyclone Report: Hurricane Nicole (PSHJAX)Source reviewed 2026-10-24
- UFM 4-150-07 Waterfront Facilities: Operation and MaintenanceSource reviewed 2026-10-24
- Mile Point study meets with approval, supportSource reviewed 2026-10-24
- FDEP Outstanding Florida Waters (OpenData) point querySource reviewed 2026-10-24
- COJ Capital Projects layerSource reviewed 2026-10-24
- Online/Electronic Permit SubmissionSource reviewed 2026-10-24
- Building Inspection DivisionSource reviewed 2026-10-24
- Northeast DistrictSource reviewed 2026-10-24
- Operating Agreements ERP Permitting: DEP District Offices and the Water Management District OfficesSource reviewed 2026-10-24
- Operating Agreement Concerning Regulation Under Part IV, Ch. 373, F.S., Between SJRWMD and DEP (eff. 07/01/07)Source reviewed 2026-10-24
- Federal Permits and Coordination Agreements Between DEP, WMDs, and the U.S. Army Corps of EngineersSource reviewed 2026-10-24
- SPGP VI – 1. Shoreline Stabilization, Activity descriptionSource reviewed 2026-10-24
- Reissuance and Modification of Nationwide Permits (91 FR 768, Jan. 8, 2026)Source reviewed 2026-10-24
- Services Provided: Violation or Permit Record SearchSource reviewed 2026-10-24
- Duval County Property AppraiserSource reviewed 2026-10-24
- Floodplain ManagementSource reviewed 2026-10-24
- St. Johns River at Mayport (MYPF1)Source reviewed 2026-10-24