Hi Lily,
It’s good that you have documented all those observations. Unfortunately, we don’t have access to the detailed drawing and real-time assessment of the affected components.
Our ultimate goal is to have an operational seawall drainage system that is fit for purpose. This can be achieved through the use of appropriate materials and regular maintenance.
Considering the drainage system as a whole and given your observations, I suggest you propose different design alternatives (for example – only replacing component x or replacing component x and the fiberglass).
These design alternatives may have different associated risks and opportunities, such as cost, performance, etc. Mapping your design alternatives as a team will help you to make informed decisions.
All the best in your project,
Jean
Jean Aquinde