An early morning fire damaged a small strip mall on West 6th Street in The Dalles.  Mid-Columbia Fire and Rescue District Chief Bob Palmer says the fire started around 1:12 a.m. Wednesday, and took over five hours for crews to bring under control.  An investigation into the fire is underway, but Palmer says it appears the fire originated in the center of the main structure, and then extend east into businesses.  He estimated 60 to 70 percent of the building suffered significant damage.  The Dalles Police Department and MCFR are investigating the cause of the fire, with the Oregon State Fire Marshal’s office and the Oregon State Police involved as well.  Dallesport, Mosier, Cascade Locks, Dufur, Wamic, and Bingen fire departments all assisted in firefighting effort.  Palmer said one firefighter suffered a minor injury, but was treated on scene.