Complex sentence: The lake had already washed away shoreline near Arch Rock; there was at least of berm between the road and shoreline in the 1970s and by 1985 some sections had been reduced to just.
Split into simpler sentences: The lake had already washed away shoreline near Arch Rock. There was at least of berm between the road and shoreline in the 1970s; by 1985 some sections had been reduced to just.