*NEW* Drainage Improvements on 345 Wianno Ave. in Osterville: Drainage improvements will start on Wianno Ave. in Osterville for the next week. Work includes installing new drainage structures, installing hot mix asphalt to patch the roadway surface and restoration of the road shoulders. Drainage improvements will start on Wianno Ave. in Osterville for the next week. Work includes installing new drainage structures, installing hot mix asphalt to patch the roadway surface and restoration of the road shoulders.