Even during a three-year, round-the-clock renovation soon to be under way, the Everett McKinley Dirksen U.S. Courthouse, home of the nation's third largest federal district court, will remain open with normal hours for courts and government offices, the U.S. General Services Administration announced today. The phased construction, which begins in September, will be keyed to keeping the 30-story building open, along with its 57 courtrooms and 11 federal government offices. The renovation's major focus will be the replacement of the building's nearly 50-year-old heating and ventilation, fire alarm and lighting systems. Most work will be done at night and on weekends to limit disruptions. "The modernization of this architectural landmark designed by Mies van der Rohe exemplifies GSA's commitment to sustainable design," said GSA Acting Regional Administrator J. David Hood. "By making our public buildings higher-performing and more energy-efficient we maximize their value to the taxpayer. And with the benefits of new technology, we are renewing the future of this courthouse by building upon the creative energies that produced it and the stewardship that has preserved it." The building's largest tenant is the U.S. District Court for Northern Illinois with 40 judges and more than 400 employees. The courthouse is also the seat of the 7th Circuit Court of Appeals and the U.S. Bankruptcy Court for Northern Illinois. Other tenants include the U.S. Attorney, U.S. Marshals Service and the U.S. Trustees. Chief Judge James F. Holderman of the U.S. District Court for Northern Illinois acknowledged that the project will cause some disruption and inconvenience. He said, however, "We of the United States District Court, as tenants, look forward to working cooperatively with GSA to keep the disruption to a minimum and the courts running smoothly as GSA completes these necessary renovations."