Seaford Living Shoreline Stabilization
GMB has assisted the City of Seaford, Delaware with the preparation of plans and specifications for a living shoreline stabilization project. The project involved the installation of approximately 400 linear feet of rock toe sill and wetlands vegetation designed for the protection of an eroding shoreline along the banks of the Nanticoke River in downtown Seaford. The rock sill provides protection to the vegetation area behind it against wave action and tidal influences. The profile of the sill allows for total inundation during high tide and full exposure during low tide, to allow for the deposition and retention of sediment. The vegetation behind the rock sill provides stabilization by creation of a root structure that will increase in density over time. There are three planting zones (pickerel weed, blue flag, and soft rush) which were selected based on the inundation conditions and individual requirements of each plant species. GMB partnered with Hasting Marine Construction who was responsible for acquiring the DNREC Subaqueous Lands permit.
The project also consisted of 400 linear feet of upland rock revetment for stabilization of an interceptor sewer main which parallels the shoreline of the Nanticoke River. The project was funded by the Clean Water State Revolving Loan Fund. Construction was completed in late summer 2010.