The Delaware Valley Opera presents the Barber of Seville at the Tusten Theater in Narrowsburg NY August 2015. Kathy Geary, Soprano Violetta Zabbi, Pianist The Delaware Valley Opera is a member of the Delaware Valley Arts Alliance, the Arts Council for Sullivan County, NY, and maintains an office in the Delaware Arts Center, 37 Main Street, Narrowsburg, NY, 845-252-3136.