Marina del Rey, CA Coastal Erosion Rate
Is the coast eroding 1.9 miles south of Marina del Rey, CA?
The coast 1.9 miles south of Marina del Rey, CA is actually gaining ground, not losing it: USGS's transects measure 1.07 feet of accretion a year here, sediment building up rather than washing away. At that rate, the shoreline has gained roughly 10.7 feet over the last decade.
What "Marina del Rey" means on this page
Marina del Rey, CA is the nearest named place, 1.9 miles away, to a ~3.5-mile stretch of coast USGS has surveyed - the reading below covers that whole stretch, not a single property in it. Segment center: 33.95, -118.45. USGS's California assessment last surveyed this stretch through 1852-2016, computing the rate with its LRR method. Other US regions were surveyed in different years, sometimes decades apart, so this page states its own rather than implying one national vintage.
What 1.07 ft/yr means over time
Holding the 1.07 ft/yr accretion rate 1.9 miles south of Marina del Rey, CA for 25 years would add roughly 27 feet of shoreline, again assuming nothing about the local sediment supply changes.
What backs this reading up
Averaging 113 separate transects produced this segment's rate, with 0% individually reading as erosion, rather than relying on any single survey line. USGS's confidence interval here is ±0.6 ft/yr. This segment ranks 1118 of 1211 measured US coastal segments, ordered from fastest erosion to fastest growth. Source: USGS National Shoreline Change data release (ScienceBase, DOI 10.5066/P94J0K7Z), Kratzmann 2024 / Data Report 1187. West Sayville, NY sits at national rank 1057 for growth (0.66 ft/yr), one reference point among the 1211 scored segments, 2509 miles from here. 2.4 miles up the coast, El Segundo, CA shows 1.04 ft/yr of accreting.
Marina del Rey, CA on the source map: try the Coastal Change Hazards Portal, zoomable well past this page's ~3.5-mile grain.