IMPERIAL BEACH, Calif. -- The Imperial Beach Pier will be closed for a week starting Monday so that three 60-foot-long pilings can be replaced and other repairs are made to the structure.

The pier and adjacent beach will be closed through Nov. 21 while the repairs are completed, according to the Port of San Diego.

A helicopter will be used to transport the 2,800-pound pilings. Other repairs include replacing about 20 percent of the deck boards, repairing the steel ramp and stair structure, putting in new guardrail posts and fixing the sewer system.

The $639,860 project is being done to ensure the pier's safety and longevity.

The Imperial Beach Pier, which was constructed in the 1960s, was renovated and extended in 1986, and structural improvements were made again in 2006.

Over the years, the pier's steel supports and timber components began to degrade.