PLEASANTON -- The public is invited Saturday to the grand reopening of the Dolores Bengtson Aquatic Center, which has undergone a yearlong renovation, city officials said.

The celebration is scheduled from 11 a.m. to 4 p.m. at the center, 4455 Black Ave. in Pleasanton.

Festivities will have a pirate theme, and those who come dressed as a pirate will be granted an extra chance to win a special door prize.

The event will offer a free recreational swim to the first 500 guests to arrive. Door prizes, games, arts and crafts, and a free boat box derby race also will be featured. Free refreshments will be available.

Renovation work included replastering two pools and installing Americans with Disabilities Act (ADA) access.

It also involved reconfiguring the center's 25-meter pool into an L-shape, where the diving pool was relocated, officials said. Also, the 25-meter pool was deepened so that it can host competitions. Each pool received new plumbing, heating, electrical and filtration systems.

The center, built in the early 1970s, is part of Amador Valley Community Park.

For more information, call 925-931-3420 or go online at www.PleasantonAquaticCenter.com.

Contact Chris De Benedetti at 510-353-7011. Follow him at Twitter.com/cdebenedetti.