Help with your seawall project·Upper Keys
Key Largo & the Upper Keys

Follow the water.
Find the loss.

By Upper Keys SeawallUpdated: 2026-10-26

Water behind a seawall does not always come over its top. Start by recording where it appears, when it happens and what changes nearby.

About 3 min readOfficial sources linked below

Create a simple water-and-ground record

  • Mark each recurring puddle, depression and settled paving area.
  • Note the date, rainfall, visible water level and whether the road also flooded.
  • Keep photos from safe, repeatable positions.
  • Identify downspouts, surface drains and visible wall outlets without probing them.

What does a useful observation log look like?

One entry per event or observation
FieldWrite down
Time and conditions
When you first saw water, recent rain and visible canal level.
Starting location
Road, driveway, yard depression, outlet or overtopping at the cap.
Route and duration
Where water moved and what remained after conditions changed.
Separate wall changes
New gaps, movement, escaping material or changed ground level.

Use the same safe viewpoints on later visits. If a drain is submerged or inaccessible, record that fact instead of opening, probing or altering it.

Separate public drainage from private wall condition

The county describes road elevation and an engineered stormwater system for Twin Lakes. That public scope shows why street, driveway and yard levels belong in a waterfront discussion. It does not diagnose a private wall or promise that public works will resolve a private drainage problem.

Twin Lakes road and stormwater scope

What should the investigation resolve?

Different findings need different scopes
Finding to investigateQuestion for the professional
Material escaping at the wall
Which opening or pathway needs repair?
Runoff collecting behind the cap
How will water leave without creating another problem?
Changing ground levels
Is the cause localized soil loss, settlement or something else?
Flooding tied to the road or tide
Which public and private systems interact, and what records are needed?

Ask the professional to identify what remains uncertain before prescribing a drain or fill treatment.

What should a proposed fix explain?

  1. The problem it addresses

    Have the proposal name the observed pattern and the investigation supporting its explanation.

  2. The complete route

    Ask where water enters and leaves, what levels control the route and whether the work affects neighboring or public drainage.

  3. The check after completion

    Agree on what can be verified at handover and what needs later observation in relevant conditions.

If the proposal changes yard levels, outlets or the cap, have those changes shown together. Keep any unresolved road or public-system issue on a separate action list.

Do not add holes or fill by guesswork

Changes to the wall or drainage discharge belong in the full proposed scope. DEP’s permitting services distinguish repairs, alterations and exemptions, and the county may attach outside-approval conditions. Obtain the design and applicable permission before changing the outlet arrangement.

DEP ERP e-Permitting · Notice To Proceed Instructional Handout (Internet Archive copy)

Give the next provider a usable brief

Combine the observation log, survey, permit history and marked photographs. Ask for a proposal that states how the cause will be addressed and how the result will be checked. See injection limits if filling a void is one option, and assessment questions if movement is also present.

Show sourcesHide sources

Let’s move your project forward.

Tell us where your property is and what needs attention.

Start with what you know. We’ll help you work out the next step.