How does a seawall stay upright?
A seawall holds back tons of wet soil. It stays upright in one of two ways: its base is driven deep enough to resist on its own, or tiebacks pull it back toward the yard.
- Tieback or tie rod: a steel rod or cable running from the wall into the yard.
- Deadman: a buried concrete block or pile that the tieback anchors into.
- Waler: a horizontal beam on the wall that spreads each tieback’s pull.
- Helical anchor: a screw-shaped steel shaft turned into the soil to act as the anchor.
- Cantilever wall: a wall with no tiebacks that relies on being driven deep into the ground.
Measure the lean before you hire anyone
A baseline turns a worry into evidence. Measure the same points every few months and after each storm.
- Set fixed marks on the cap every 10 to 20 feet.
- Pull a tight string between the wall’s ends and measure from it to each mark.
- Hold a level against the face and record the tilt.
- Photograph each point with the date and tide stage.
| Pattern | Possible cause |
|---|---|
Lean that grows after storms | Corroded or broken tiebacks, or a scoured toe |
Cap separating from the yard in one spot | A single failed anchor |
Whole wall rotating outward | Wall not driven deep enough, or widespread anchor loss |
Wall bowing out between corners | Failed walers or tiebacks along that stretch |
Anchor systems compared
Several systems appear in local public projects, which gives you a way to ask bidders for comparable work.
| System | How it works | Local or state reference | Trade-offs |
|---|---|---|---|
Tie rods with concrete deadman piles | Steel rods tie walers to buried prestressed piles | St. Andrews Marina’s new steel bulkhead uses tie rods and 18-inch prestressed concrete deadman piles St. Andrews Marina pricing table | Needs digging room behind the wall |
Cantilever, no tiebacks | Driven deep, so the buried part carries the load | Bay County’s Ira Hutchinson Park vinyl wall is cantilevered with no tiebacks Bay County ITB 26-55 scope | Works only where the soil and wall height allow |
Helical anchors | Screwed-in shafts installed through or behind the wall | Ask bidders for permitted local jobs you can look up | Less digging; depends on the soil |
Temporary Gulf-front wall | Short-term protection after a storm | Florida limits temporary walls to ones without concrete caps or tiebacks, removed within 60 days unless a permit application is filed Rule 62B-33.0051(5) | Not a permanent fix |
The engineer should choose the system from soil data and wall height. Ask what borings or probes the design relies on.
What storms have done to anchored walls here
Surge loads walls from both sides. Water rises behind the wall, then drops away in front of it, and weak anchors give way.
The local record is long. After Hurricane Eloise in 1975, a Corps engineer reported that many bulkheads along the Panama City beaches were reduced to rubble. USACE Eloise paper In Michael, 150 feet of bulkheads at Money Bayou in Gulf County took Level 3 major damage. DEP Michael report
After any surge, check the anchors and the toe together. A wall that looks straight from the yard can still have lost support below the waterline.
Is there room behind the wall for new anchors?
New tiebacks need space and digging in the yard. Map trees, pools, utilities and property lines before you ask for a design.
- Site plan: Bay County’s Form B36 asks for the work footprint, equipment location, setbacks and easements. Bay County Form B36
- Vegetation buffers: where a 30-foot natural buffer exists next to Class I or Class II waters, Bay County’s code says to preserve it. Bay County LDR 2807 West Bay, North Bay and East Bay are Class II waters. Bay County Policy 6.4.2 Ask how anchor trenches will cross that buffer.
- Neighbors: ask whether any anchor would reach under a neighboring lot.
Permits and licenses for anchor work
Anchor work is structural, so plan on a permit. Unincorporated Bay County requires a building permit whenever a seawall gets a structural repair. Bay County permit requirements
Match the license to the job. Bay County’s scope guide lists marine specialty contractors for seawalls, bulkheads and pile driving. Bay County scope guide In Panama City Beach, contractors must also register with the city before pulling permits. Panama City Beach contractor registration
- For a Panama City Beach job, look for the contractor on the city’s active contractor list. Panama City Beach active contractors
- In unincorporated Bay County, confirm the license by calling (850) 248-8350. Bay County licensing FAQ
The permit guide lists each office, and the contractor check guide walks through the license search.
How to price anchor work fairly
Anchor jobs hide surprises underground, so the contract type matters. Panama City used a cost-plus contract with no guaranteed maximum price for its St. Andrews Marina bulkhead, plus a contractor fee of up to 20%. Panama City memo, June 2026
A homeowner usually wants more certainty than that. Ask for a fixed price for a set number of anchors, plus a unit price for each extra anchor if conditions differ.
- Price per tieback or helical anchor, installed and tested.
- Cost of exposing and inspecting an existing tieback first.
- Restoring lawn, pavers and irrigation along the trench line.
- Any waler or cap work needed to connect the new anchors.
Use the cost guide to budget the full job.
Questions to ask before you sign for anchor repair
- What caused the lean, and how do you know it is the anchors?
- Will you expose an existing tieback before designing new ones?
- Who designed the anchor layout, and will the plans be sealed?
- How will you load-test each new anchor?
- Is the toe sound enough that anchors alone will stop the movement?
- What happens if you hit utilities or old deadmen while digging?
Related guides: soil loss, replacement and assessment.
Where anchors work hardest
Exposure and design decide how much your anchors carry.
- Southport, Bayou George & Deer Point Lake: the county's Ira Hutchinson Park wall is cantilevered, with no tiebacks, and built from shore. ITB 26-55 addenda
- Callaway & Parker on East Bay: Michael's eye crossed here; before a sale, have the tiebacks checked even on a wall that looks fine. NHC Michael report
- Indian Pass & Indian Lagoon: DEP rated 150 feet of Money Bayou bulkheads at major damage after Michael. DEP Michael damage survey
Show sourcesHide sources
- City Commission agenda packet June 23, 2026, item 12.a (Cost Plus Contract for St. Andrews Marina; A103-2017 contract exhibits; Cost Control memo 6/16/2026)Source reviewed 2026-10-28
- 26-55 Addendum 3 (Aug 31, 2026); also Addendum 1 (DocumentCenter/View/20819), Addendum 2 (View/21001) and ITB (View/20674)Source reviewed 2026-10-28
- Guidance to Local Governments for Emergency Temporary Coastal Armoring and Other Emergency Measures Seaward of the Coastal Construction Control Line (March 2022)Source reviewed 2026-10-27
- Surge Effects from Hurricane Eloise (W. W. Burdin, USACE Mobile District, 1976)Source reviewed 2026-10-28
- Hurricane Michael Post-Storm Beach Conditions and Coastal Impact Report (April 2019)Source reviewed 2026-10-28
- Dock and Seawall Permit Packet (Forms B36, B03, B05)Source reviewed 2026-10-28
- Bay County Land Development Regulations, Chapter 28 Landscaping and BuffersSource reviewed 2026-10-28
- Bay County Comprehensive Plan Chapter 6, Conservation ElementSource reviewed 2026-10-28
- Permits | Bay County, FLSource reviewed 2026-10-28
- KNOW YOUR SCOPE OF WORK BY LICENSE TYPESource reviewed 2026-10-28
- Contractor Registration & Trust AccountsSource reviewed 2026-10-28
- List of Contractors (Active Contractors PDF)Source reviewed 2026-10-29
- FAQs - Building Safety - Contractor LicensingSource reviewed 2026-10-28
- Tropical Cyclone Report: Hurricane Michael (AL142018)Source reviewed 2026-10-28