Ready to swim in the bay? The waters off Chicken Ranch Beach will soon be safer. On Tuesday, the Board of Supervisors authorized Marin County Parks to execute a 10-year lease agreement with the California State Lands Commission for the installation, use and maintenance of six marker buoys off the Inverness beach, some of which broke lose in storms two years ago. For nearly 20 years, the buoys helped delineate a safe swimming area, protecting…