The existing 38 year old boardwalk marine structure on an artificial lake was seriously deteriorated. It consisted of wooden piles, a lumber wall to retain the backfill and a concrete slab on top. The as-built information was almost nonexistent and that that there was turned out to be misleading at the least.. The steel tie rods had failed and all were replaced and tested. Some of the timber piles needed an underwater epoxy fix to avoid collapse. These were eventually repaired with fiberglass jackets filled with pourable epoxy. The other piles were sealed with underwater epoxy. The fill was replaced with granular backfill wrapped with geofabric, The lumber wall was replaced with new treated lumber and a new concrete slab was poured. The concrete had to pumped up to 350 ft. The original design called to vinyl sheetpiles to support the deck but no contractors were available to perform the work. The deck is now supported by helical anchors, which based on the soil resistivety, should last for more than 160 years.