CHESTERFIELD COUNTY, Va. Construction is officially underway on a new Chesterfield Fire Station 1, replacing a 64-year-old facility that was never built for around-the-clock service.The groundbreaking at the future site of the new station took place Wednesday morning. The original station, located a half mile down Route 10, was built and staffed by volunteers in 1964 and was not designed for 24/7 operations despite now serving the second busiest…