![]() ![]() Army Corps of Engineers Beneficial Use project at Ocean Beach is complete! The sand placement will protect the bluff and the wastewater infrastructure from erosion and is designed to last approximately 5-6 years before eroding into the nearshore. Rather than placing more rock, the CCSF, GGNRA, and many residents want to find a means of bluff protection and beach creation that does not include rock. Despite those efforts, a stretch of bluff continues to erode, undermining a parking lot and roadway shoulder adjacent to the Great Highway. The rock has only been placed in front of areas that had just eroded, so other sections of the bluff remain unprotected. Conversely, because there are no protective structures from Sloat Boulevard south to Fort Funston, intense winter storms have caused significant beach retreat and bluff erosion.īecause the bluff consists of unconsolidated sand, which is susceptible to periodic severe erosion, and construction debris, which litters the beach when exposed, the CCSF has repeatedly placed rock revetments against the bluff face and attempted to create protective sand dunes to protect the valuable infrastructure immediately inland from the bluff. Between the Cliff House and Taraval Street are constructed dunes and three seawalls that limit storm-generated impacts to public facilities and provide for a wide, user-friendly beach. Construction debris from development in the 1800s and early 1900s moved the shoreline seaward, and construction of a large wastewater transport pipe resulted in placing approximately 400,000 yd 3 of sand on the beach. Subsequently, a combination of human activities and winter storms caused significant fluctuations in shoreline position. In 1852, the Ocean Beach shoreline in the vicinity of the Lake Merced outlet, at the location of Sloat Boulevard, was situated hundreds of feet landward of its current location.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |