Cracks are information, not a diagnosis
The location, pattern, width, and change over time can all matter. Cracks near joints or openings may have a different meaning than a wall that is moving or separating from surrounding material. A contractor should evaluate the full shoreline context.
Water and soil behind concrete
Drainage problems, washout, and voids behind a wall can remove support even when the face still appears intact. Look for sinkage, gaps, damp areas, or soil disappearing toward the water.
Questions to bring to an evaluation
Ask what appears to be causing the deterioration, whether the existing wall can be repaired, how access will work, and what shoreline approvals may apply.
Material work and local requirements
Concrete repair can sit within a larger shoreline-improvement project. Confirm whether the proposed work changes the shoreline, drainage, or bank stabilization and whether Ameren Missouri requirements apply.