Chunks of concrete were ripped out of the Fidalgo Pool and Fitness Center basement wall with a crowbar during a structural evaluation on Oct. 26.
The damage to the wall was due to spalling – water entering the concrete, forcing the surface to crack. Once the chunks were removed, the reinforcing steel beams showed signs of corrosion, according to the report from engineers at PCS Structural Solutions.
The wall was one of two locations in the pool basement that were reviewed. The other location was a concrete beam with a large crack in it above the pool filter pit, which supports some piping down below. The cracking primarily occurred on the top 4 inches of the beam, the report states.
The engineers concluded that the spalling appeared to be the result of the reinforcing steel becoming corroded.
To mitigate further corrosion, engineers advised to chip and remove all unsound and spalled concrete, remove oxidation, dirt and debris from steel reinforcements and to cover them in a bonding agent. Then, they advised to patch and resurface the distressed concrete with a specific mortar product.
“We need to go out for some bids,” Executive Director Mitch Everton said.
The report from PCS Structural Solutions cost the pool $1,500, he said. The report did not come to any conclusions about the stability or structural soundness of the rest of the building.