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To orient yourself, South Capitol Street at far left, the 11th Street Bridges to the right, and the SE Freeway forms the northern barrier.
The 2002 version, from Google Maps, shows the first wave of changes. From left to right: the arrival of the trash transfer garage at 1st and N and the Public Self Storage building on South Capitol, 80 M (completed in 2001), demolition of buildings owned by the Washington Star at 2nd and Virginia, initial demolition of buildings on the Capitol Hill Tower site, the initial work at 1100 New Jersey, 300 M (completed in 2001), demolition of four buildings at the Southeast Federal Center, the renovation/expansion at the Navy Yard, the demolition of two Capper apartment buildings along Virginia Ave. and 7th Street, and the completion of Maritime Plaza I and beginning of Maritime Plaza II just east of the 11th Street Bridges.
The first post-ballpark image, from spring 2008 (probably May or very late April judging by the progress of the 1015 Half Street hole), from Google, showing the high-water mark of Near Southeast's reconstruction in a mere 18 months since the previous image (not highlighted because there's too many things to mark!). From left: the streetscape changes to South Capitol Street and the lowered Douglass Bridge, demolition at 1325 South Capitol, the completed Nationals Park, Monument's Half Street progress, all sorts of new surface parking lots at The Yards and Capper, JPI's 70/100 I and 909 New Jersey, the Velocity block, Onyx and 100 M, the parking lot in place of the demolished old Capper Seniors, and more. (And it must be a weekend, judging by all those empty parking lots!)