This was widely know-but here is an article from today's Post Dispatch
Lambert Field's new runway — the one that cost $1.1 billion and displaced thousands of north St. Louis County residents — is getting little use and therefore generating fewer noise complaints than critics predicted.
Between its April 13 opening and Sept. 30, the runway handled about 5 percent of departures and landings, or about 6,600 operations, airport data show. Most of those flights are Delta, Continental, and other air carriers with gates in Concourse A.
The airport has three main runways. The busiest, closest to the terminals and longer than the other two main airstrips, handled nearly 50 percent of the 126,700 departures and arrivals.