Mount Hope Boat Ramp

Bristol, Rhode Island
Owner: Rhode Island Department of Environmental Management

This project required the design of a new 60-foot-wide boat ramp with two floating courtesy docks, one of which is fully-handicapped accessible; a three-tiered parking area; approximately 1,000 feet of access road to enter the site; a Gazebo; and bio-retention for water quality. There were several wetland areas throughout the site that impacted the design and layout of the facility. GRA developed a stormwater management plan to improve the quality of the runoff to the Narragansett Bay. The system included bio-detention areas and overland flow to control and mitigate pollutants. In addition, GRA collected sediment samples from the boat ramp/dock areas and used the analytical data to evaluate dredge spoils management options. Metals identified in the sediment met the Residential Direct Exposure Criteria but were not compliant with the beach nourishment criteria. A dredge spoils management plan was developed in accordance with the RIDEM's Rules and Regulations for Dredging and the Management of Dredged Material. The plan allowed the project to dredge materials from the bay, re-utilize the dredge spoils as part of the new parking facility's sub-base, and cap the placed spoils with gravel and asphalt to prevent stormwater infiltration.