Bulkhead tiebacks and anchors.
When the wall leans, check what holds it.

Why is my bulkhead leaning?

Soil and water behind a bulkhead push it toward the water all the time. The wall resists in two places. The toe, driven into the bottom, holds the base. Tiebacks hold the top.

When one of those gives, the wall starts to rotate or bow. Movement is often slow, then fast after a storm or a wet spell.

How is a bulkhead held up?

• Tie rod: a steel rod running from the wall back into the yard.
• Wale: a beam along the wall that spreads the rod loads. On many walls the cap does this job.
• Deadman: a buried concrete block or beam that the tie rod pulls against.
• Helical anchor: a steel shaft with screw plates, turned into the ground at an angle behind the wall. It is often used for retrofits where a deadman is hard to dig.
• Toe: the bottom of the wall below the bottom of the bay. It needs enough depth and enough soil in front to hold.

Tie rods sit in wet, salty soil. Corrosion where the rod meets the wall is a common weak point, but only digging shows it.

What signs point to anchor trouble?

Record what you see with the steps in the assessment guide, and keep people off the ground behind a moving wall.

What does an engineer check?

• Measurements of lean along the wall, as a baseline to compare later.
• A dig at a tieback to see rod size, corrosion and the connection.
• Where the deadmen or anchors are, and whether they have moved.
• Water depth and scour at the toe, often by probing from the water.
• Soil behind the wall: voids, soft spots, and loads such as pools, driveways and boat storage.
• Whether new anchors can save the wall, or it needs replacing.

Look up the engineer’s license on MyFloridaLicense, for both the person who will sign the plans and the firm. FBPE license lookup Engineering guidance treats bulkhead design as site-specific. USACE EM 1110-2-1614

What are the repair options, and what do they cost?

• New tie rods: replace corroded rods and connections, often with new anchors.
• Helical anchors: add screw anchors through the wall or cap where a deadman cannot be dug.
• New deadman: pour a new anchor block farther back, in firmer soil.
• Toe protection: place rock at the base where the bottom has scoured. See riprap.
• Replacement: when the wall itself is failing, new anchors only delay the job. See bulkhead replacement.

Space behind the wall shapes the choice. Pools, patios, trees, septic fields and property lines can block a deadman, so tell the engineer about them up front.

For a local price point, look at Destin’s 2019 Clement Taylor Park seawall bid. The low bidder priced aluminum tie rods at $518 each and deadman anchors at $232 each, 66 of each over 325 feet. Destin bid unit prices Those were parts of a full new wall, not a retrofit. Use the cost guide to price your own scope.

Which local rules affect anchor work?

Anchor work means digging behind the wall and changing its structure, so expect a permit. Destin requires one to repair bulkheads and seawalls. Destin permit rule

In Walton County’s coastal building zone, structural plans for a building permit must be certified by a Florida-registered architect or engineer. Walton coastal building zone For seawalls in flood Zone V, Destin requires a design professional’s analysis showing the wall will not push floodwater or waves onto neighbors. Destin LDC 11.04.17 Okaloosa and Walton apply the same test in Zone V and Coastal A zones. Okaloosa LDC 3.06.16 Walton LDC 4.09.16

Look up your flood zone on Destin’s Forerunner portal before the engineer’s visit. Destin flood portal The permit guide and the Okaloosa and Walton county guides list the offices.

My wall started leaning after Isaias. What now?

Storm water soaks the backfill. When the water outside drops faster than the water in the soil, the trapped water pushes the wall outward. During Isaias, water at Old Pass Lagoon in Destin Harbor peaked at about 4 feet above mean higher high water. NWS Isaias water levels

• Rope off the ground behind the leaning section.
• Move vehicles, boat trailers and heavy furniture away from the wall.
• Photograph and measure the lean now, then weekly.
• Call an engineer before anyone digs or fills.

Some cities allow emergency stabilization before the permit. In Fort Walton Beach, the permit must be applied for on the first working day after the emergency repair. FWB Code 3.01.05 Ask your own permit office before relying on a rule like that.

What to ask before you sign

• Did an engineer design the anchor repair? Will I get sealed drawings?
• How many tiebacks were dug up and checked before the bid?
• Which anchor type, size and spacing will you use, and why?
• How will you protect the wall while the old rods are exposed?
• What is the plan if the toe is also scoured?
• Which insurance do you carry? Florida’s marine specialty rule requires workers’ comp and liability coverage, including federal Longshore coverage where it applies. Rule 61G4-15.100(4)
• In unincorporated Okaloosa, do you hold a current county competency card? Call (850) 651-7180 to check. Okaloosa contractor licensing

The contractor check guide covers the rest of the license check.

Where anchors work hardest

Exposure decides how much your anchors carry.

• Kelly Plantation & Regatta Bay: on the open bay, stronger tiebacks tend to matter more than on a bayou.
• Destin Harbor & Holiday Isle: boat traffic scours the toe, which takes support away from the bottom of the wall.