SPEAKERS & TOURS
Waiheʻe Tunnel
This BWS site is closed for infrastructure improvements throughout Waiheʻe Valley through about early 2027. Please check back for updates. When tours are available, visitors have the opportunity for a unique educational experience.
"I would recommend this field trip to everyone. I really enjoyed my time... I will never forget!"
Awaken your senses with a walk inside the 1,500-foot dike tunnel that provides water to Windward Oʻahu, from Kahaluʻu to Kailua. Tour includes introduction of to the Oʻahu water cycle, discussion on watershed areas and facility history. Free 2-hour group tour is available by appointment only. Grade 7 and older.
"I appreciate the opportunity provided to me, my students, and their parents to visit and take a tour of Waiheʻe Tunnel and Watershed. It's an invaluable experience for all and I'm sure the memory of this experience will last a lifetime. Mahalo nui loa."
Additional Tour Information
Updated: 06/04/2026