This report summarizes the data collected as part of a program to determine the potential affects on water quality in Rustico Bay that may result from the removal of the Little Harbor Causeway. It is based on field studies carried out between 15 July-1 August 1997. The major objectives of the water quality portion of the field studies were (1) to determine existing water quality within the Bay and the two rivers entering the Bay, and (2) to determine the potential nutrient fluxes that may result from resuspension of sediments within the Bay. In addition, data was collected to determine the extent of water column stratification within the Bay and the estuarine portion of the rivers.