The IRS announced today (IR-2006-107) that its headquarters building will remain closed at least through 2006:

The IRS and GSA announced today initial findings from GSA’s flood damage report on the IRS’s Headquarters Building at 1111 Constitution Ave. NW. According to the GSA assessment, complete building restoration won’t be complete until about the first of the year due to extensive damage the building’s infrastructure sustained during last month’s heavy rainfall….

The lengthy delay reflects the heavy damage sustained during the record rainfall. Critical parts of the building’s electrical system and heating and air conditioning systems were destroyed or heavily damaged during the record rainfall. The equipment is located in the building’s subbasement, which was submerged in more than 20 feet of water.