Tough news for editorial boards who want to raze Memorial Coliseum. As reported on OPB, the 49-year-old building is headed for National Historic Register designation, which will mean any group looking to demolish the Coliseum will have to jump through a difficult new set of hoops. What's not clear is whether the designation will cover the whole building or just the outside — some redevelopment ideas include scrapping the interior bowl.

Meanwhile, downtown plans are in the works for an ultra-modern building: Portland Architecture has the first full rendering I've seen of the planned Oregon Sustainability Center.

The website for the 250-foot tall building proposed to take up the city block between SW 4th and 5th Ave at Harrison and Montgomery has a bunch of cool design ideas for how to make the structure water independent and zero energy impact.