Mendocino County Bridges: Route 271 Bridges across Big Dann and Cedar Creek
2000 (39.84861, -123.70222) Cedar Creek Bridge
When State Highway 101 was completed, old State Route 271 was relinquished to the county. However local residents continued to use the Big Dann (10 0030) and Cedar Creek (10 0029) bridges (on 271) to get to and from their homes. The cost to seismically retrofit these big bridges would have been millions of dollars and so the residents agreed to the installation of seismic gates instead. When an earthquake occurs, the ground shaking will close the gates, preventing people from driving onto the bridges.