Alaska's lone road to North Slope oil field operations remains closed for the third time in two months while emergency crews continue to redirect flooding from an adjacent river, state officials said on Friday. Alaska Governor Bill Walker's office said he would sign a second disaster proclamation while in Deadhorse, the base of operations for several oilfields, after a three-day tour of drill sites that included a fly-over of the flooded area. Production and pipeline operations have not been affected by the closure, said BP Plc spokeswoman Dawn Patience, operator for the Prudhoe Bay field. A 10-mile stretch of the Dalton Highway leading into Deadhorse shut down early on Monday morning and state transportation officials had hoped to re-open the roadway on Friday.