The Marin County Deputy Zoning Administrator will hear a Bolinas resident’s application for a coastal permit today to build an underground concrete pier wall and beams to strengthen the bluff under the cliffside Terrace Avenue property. The emergency repair results from ongoing slides that have exposed four feet of the home’s concrete foundation, on the southern corner. The slope is continuing to erode, threatening the stability of the home, which was built in 1962. A…