(Baker City, OR) -- The National Historic Oregon Trail Interpretive Center reopens Friday in Baker City. It's been closed three years for renovations. One-million dollars from the Great American Outdoors Act helped pay for the renovations. The building is now fully net-zero which reduced the overall energy consumption by 73 percent. The Center first opened in 1992 and has drawn two-and-a-half million visitors to the area. To celebrate the reopening, admission will be free Friday through Sunday.