Photo submittedDorthea Petersen Reception planned in Dorthea Petersen’s honor Tue, 09/05/2017 - 8:47am admin WALNUT -- Dorthea (Davis) Petersen will celebrate her 90th birthday on Sunday, September 10 at a reception from 11:30 a.m.-1 p.m. at the Peace United Church of Christ in Walnut following Sunday worship service. Section: Family