Bulkhead Repair on Mobile's Bay Front: Arlington, Brookley and the Peninsula

Between Brookley and Arlington the current map shows VE zones at 14 and 15 feet along the water. AE zones at 10 to 13 feet sit behind them, with shaded X (the 0.2 percent chance area) farther inland. FEMA flood map, June 5, 2020

Mobile's code regulates the coastal AE zone, which lies between the 1.5-foot breaking wave line and the V zone, as if it were VE. Mobile City Code Chapter 17

• New homes in those zones must stand back from the mean high tide line, and the space below stays open or uses breakaway walls. City Code Sec. 17-29
• No boathouse, shed or other accessory building may sit below base flood elevation in VE or coastal AE. City Code Sec. 17-27
• For city permits, shaded X counts as a special flood hazard area, so it is treated like the 100-year floodplain. Land Disturbance Guide

Repairs that reach 50 percent of a building's value count as substantial damage under city code. Mobile sets that value as the tax assessment, without land, plus 20 percent. Mobile 50% Flood Packet

A general contractor must sign a detailed estimate, and storm repairs are priced at pre-storm costs. Items like permit fees, debris removal and landscaping do not count toward the total. Mobile 50% Flood Packet

Two floods in ten years, each averaging at least 25 percent of value, also count. City Code Sec. 17-2

The Coast Guard Sector Mobile gauge (8736897) at Arlington Channel is the closest gauge. It peaked at 5.3 feet above mean higher high water (MHHW) in both Zeta and Nate. NOAA gauge 8736897

• Zeta in 2020 brought 4 to 6 feet of inundation near the northwest bay coast. NWS Zeta summary
• Katrina in 2005 reached 11.45 feet at the State Docks gauge and flooded downtown. NWS Katrina summary
• Frederic in 1979 drove 8 to 10 feet of surge into northern Mobile Bay. NWS Frederic summary
• Sally in 2020 emptied the bay edge instead, sending this gauge 8.7 feet below MHHW. NOAA Sally readings

A surge height above predicted tide and a reading above MHHW are different numbers. Match the type before you compare a storm to your wall cap. See the storm guide for how to read gauges.

The county shoreline plan team visited more than 30 waterfront lots on the western shore in 2024 and 2025, including Park and Bayfront roads near Brookley. Almost every lot had a wall, mostly concrete, timber or vinyl sheet pile, often with rock at the toe. Several walls were failing or had failed. Shoreline Management Plan

Across Mobile Bay as a whole, 38.6 percent of the mapped shore was hard armor in 2009. Living Shorelines Policies Manual

In May 2026, Fox 10 reported that a neighborhood group, The Peninsula of Mobile, secured about $150,000 for a pocket beach pilot. The cost-share program helps bay-front owners add living shoreline features to cut erosion. Fox 10, May 31, 2026

• Ask about the program before you price a new vertical wall.
• Read the living shoreline guide first.

The reef at Helen Wood Park is the local lesson in upkeep. The Nature Conservancy placed 343 reef balls and 23,000 bags of shell about 100 feet off the shore in 2011. The bagged shell broke down, so Oyster Castles went on top in 2018. Nature Conservancy fact sheet

That fact sheet blamed an armored shoreline next door, channel work and ship wakes for the erosion. A 1998 headland beach near Brookley survived Georges a month after it was built. Living Shorelines Policies Manual

• Brookley by the Bay is a planned 98-acre park, with $9 million in state money announced August 21, 2026. Map for Mobile
• The city lists $578,920 for design and $7 million for construction at the McNally Park jetties and launch. City project page
• A March 2026 report says the Peninsula master plan covers about 190 acres: McNally Park, the 96-acre Perch Creek Preserve and the Ziebach property with Helen Wood Park. Bay Business News
• Arlington and Garrows Bend are mostly dredged channel, a lighted range and the Coast Guard office. Coast Pilot 5

Development on the Peninsula must use at least one low impact technique such as a rain garden. UDC Article 12

1. Get proof of any federal and state permits first, since the city makes them a condition of its own. City Code Sec. 17-6
2. File a development permit signed by owner and contractor. It covers filling, grading and dredging in a flood zone. Mobile flood permit form
3. For new construction, hand in an Elevation Certificate before the slab pour or framing, with a V-zone form where needed. Mobile Elevation Certificate timing
4. Pay building fees of $5.50 per $1,000 of value up to $50,000. Starting without a permit costs twice the fee on a first offense. Mobile fee ordinance Mobile fee ordinance

The fee ordinance exempts retaining walls up to 4 feet from the footing. Ask Build Mobile whether your bulkhead counts. Mobile fee ordinance

The city's riparian buffer rule applies only to new development on parcels of 2 acres or more, and it exempts docks and one house on an existing lot. UDC Sec. 64-3-10

Your contractor must hold a business license and a $10,000 bond on file. Mobile contractor ordinance Mobile business license Use the guide to checking a contractor for both items. The permit overview covers the state side, while the county guide handles unincorporated lots. Neighbours: Dog River and the upper river.