Gov. Gavin Newsom may greenlight a half-billion-dollar effort to widen a North Bay highway [Highway 37] that Caltrans has acknowledged is sinking under its own weight. … [T]he sinking expressway was surrounded by sinking levees, which could be overwhelmed by the more intense and more frequent storms already occurring due to climate change. … The highway blocks flows into and out of the wetland habitat, cutting off healthy functions of the ecosystem. … Caltrans has agreed to open up more channels under the roadway, raise the bridge over Tolay Creek in Sonoma County and open the channel underneath to allow more movement of water.

Other marsh sinking news:

• Knee Deep Times (San Francisco): How two rivers could rescue sinking beaches and marshes​​