The Seawall Repairs to the rock groins along the Seawall are underway from 10th to 61st street. The groins, >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> designed by the US Corps of Engineers, were built to capture migrating sand and preserve the beaches that are vital for Galveston’s tourism and economy. The granite boulders brought by train from the Austin area at the beginning of the 20th century have been picked up and laid aside for a new underlay of tumbled concrete and will then be replaced.