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Welcome to San Domenico’s Community Center and Aquatic Complex Webpage!

San Domenico has begun construction of a new Aquatic Complex that will provide best-in-class facilities for swimming and water polo competition, physical education, conditioning, and wellness for our K-12 program. The new facility will include a 4,300 square foot pool deck, spectator seating, showers and locker rooms. Phase I construction is expected to last about seven months. The new competition pool has been designed by Aquatic Design Group, one of the top aquatics architectural firms in California who designed competition pools for UC Berkeley and Stanford University.

Phase II of the project will be the completion of a new 2,000 square foot Community Center providing flexible teaching, meeting, and community gathering space on the west side of campus for the first time. The complex has been named for Sister Gervaise Valpey, a beloved and influential figure in the San Domenico community.

Please check back with this site for periodic updates on project progress. For more information about how you can become involved, please contact Anna Heidinger, Director of Advancement at

Meet SD's Director of Aquatics, Mark Anderson

An All-American water polo player, Mark Anderson has been coaching both swimming and water polo in Marin County for over 30 years.

  • 25-time Marin Swim League Champions Sleepy Hollow Swim Team Head Coach
  • Co-Head Coach and founder of Sleepy Hollow Aquatics (SHAQ) Water Polo
  • 7 MCAL Championships for Drake High School Water Polo team, under his coaching
  • 36 of Mark’s athletes went on to play for Division I colleges and universities in 2017 and 2018
  • 2014 Year Mark was inducted into the Marin County Athletic League Hall of Fame

Coach Anderson and his wife, Coach Julie Anderson, both grew up in Marin and are local residents of Sleepy Hollow.

Aquatic Complex Facts

  • Competition size pool
  • 30 meters long
  • 25 yards wide
  • 12 swimming lanes
  • Showers, pool deck, and bleachers
  • 4,300 sf community gathering and event space

Named in Honor of Sister Gervaise

Sister Gervaise Valpey

The Community Center and Aquatic Complex has been named in honor of Sister Gervaise Valpey, President Emerita.

Sister Gervaise is a beloved and influential member of the San Domenico community who was instrumental in moving the 171-year old school to its current location in San Anselmo.

An inspiration, mentor, and spiritual presence for many in our global San Domenico family, Sister Gervaise continues to be an integral part of SD's program.

"This facility will usher in a new era of aquatics for San Domenico. To have a state-of-the-art pool to train students K-12, for strength and conditioning across all sports, and from development to competitive, college-bound JV and Varsity players, is really a game changer for the School and our athletic program.
- Mark Anderson, Director of Aquatics