Oct 16, 2009. /Lesprom Network/. Welco Lumber Company USA, which makes cedar picket fence boards, will close down its Naples mill, Idaho, and concentrating production at its main Shelton, Wash., sawmill, as The Spokesman Review reported. The closure is expected in the third week of December, when all 93 employees will be laid off. Employees are eligible for up to four weeks of severance pay at a rate of one week of severance for each year of employment with a minimum payment of $1,000. Welco purchases cedar logs for its production, so closure of the mill will apparently eliminate an outlet for cedar logs in North Idaho. Welco has owned and operated the Naples mill since 1992.