The clean-up effort along the Santa Cruz coastline continued Friday, days after part of the Santa Cruz Wharf collapsed due to pounding high surf as city officials try to assess what their plans might be to rebuild the collapsed section.

Sea lions and a historic ocean swell were on a list of reasons released by officials Friday explaining why part of the iconic Santa Cruz Wharf collapsed. The wooden wharf is more than 100 years old and extends a half mile over the ocean.

A part of the Santa Cruz Wharf collapsed Monday afternoon during a high-surf warning, with authorities confirming two people had to be pulled from the water.