The Huntington Lighthouse is undergoing a lifesaving-repair job.

Called the Sand Castle, the 1912 Beaux Arts-style lighthouse that sits at the precarious entrance to picturesque Huntington Harbor was in danger of collapsing into the sea.

Pam Setchell and members of the Huntington Lighthouse Preservation Society - who have spent more than 30 years restoring the interior of the lighthouse - discovered the lighthouse's concrete base was crumbling away. 

With $700,000 already raised, a construction company that specializes on marine infrastructure services has begun the tedious repair work.

Frank Sobbo, owner of the company, explains that each gigantic rock that surrounds the lighthouse must first be removed.

The rocks that surround the lighthouse are from the granite bedrock drilled to build NYC subways.

After removing the rocks, 20-foot steel sheets will be driven into the sea bed, creating a protective wall.

After the sheeting has been put up and the concrete has been poured, 600 tons of rocks must be put back around the lighthouse.

The Huntington Lighthouse Preservation Society still needs more than $100,000 to finish the job.