Boise Cascade says it may close a plywood mill in eastern Oregon at the end of the year and lay off all the 229 people who work there.  “We haven’t made a definite decision yet to curtail (production) at the facility, but we wanted to give the (regulatory) notice to our employees that it is a likely possibility,” spokeswoman Lisa Chapman wrote in an email Tuesday.  Wildfires have limited access to timber for the Elgin mill, according to Chapman, but she said the main factor threatening the plant is a restrictive order from ...