City of Pleasanton Unveils Restored Orchard Irrigation Flume and Ohlone Ethnobotanical Garden at Alviso Adobe Community Park

Park naturalists with the City of Pleasanton Library and Recreation Department and cultural advisors from the Pleasanton Parks and Recreation Commission unveiled a restored gravity-fed redwood orchard irrigation flume, an expanded Ohlone ethnobotanical teaching garden, and a tactile audio trail on Saturday evening at Alviso Adobe Community Park at 3465 Old Foothill Road in western Pleasanton. Anchored by the 1854 Rancho Santa Rita adobe residence built by Francisco Alviso along the Arroyo de la Laguna watershed, the seven-acre interpretive park welcomes more than 12,000 Tri-Valley elementary students and weekend visitors each year.

Along the historic fig, walnut, and heritage pear orchard terrace, preservation carpenters reconstructed a 140-foot elevated heart-redwood water flume and hand-forged iron sluice gates modeled on nineteenth-century Arroyo de la Laguna agricultural diversions. A hidden solar-powered submersible pump recirculates captured rainwater from a 3,500-gallon underground cistern through the wooden trough so visiting students can operate miniature check-dams and observe gravity furrow irrigation without wasting municipal water.

Adjacent to the replica tule reed ruk dwelling, native-plant stewards established twelve raised rhyolite-stone ethnobotanical beds cultivating California soaproot, mugwort, deergrass, white sage, and valley oak seedlings used for centuries by Chochenyo-speaking Ohlone artisans for basketry, cordage, and seasonal foods. Five bronze tactile relief stations with hand-cranked bilingual audio players allow blind and low-vision visitors to experience the site's Indigenous, Mexican rancho, and twentieth-century dairy eras.

The $215,000 living-history upgrade program was funded by the Pleasanton City Council through the Park Capital Improvement Fund. Families can check weekend docent tour schedules on the City of Pleasanton Alviso Adobe Park Portal.