Reference posting dated Feb. 11, 2001. On Wed., Feb. 28, 7:00 p.m., there will be a PREVIEW of the Sunken Gardens Master Plan at 233 Third Street North. There is a facet to the plan that may be of particular concern to North Shore residents--the plan calss for vacating a portion of 18th Avenue N. between 3rd and 4th Streets. If you are interested, come and preview the plan.