Riceboro Sawmills 2366-2 Interstate Road RB Lumber LLC, a small log sawmill in Riceboro, Georgia, produces Southern yellow pine lumber. Grades #1, #2, #3 and #4 for wholesale. S4S and Rough, TPI grade Marked � HT Treated. Tel: 912-884-3386. Member of Interstate Resources, Inc. a U.S.-based corrugated packaging manufacturing group headquartered in Arlington, Virginia. Riceboro GA Sawmills RB Lumber LLC www.interstateresources.com/rb-lumber-llc.html RB Lumber LLC a small log sawmill in Riceboro Georgia GA produces Southern yellow pine lumber. Grades #1 #2 #3 and #4 for wholesale. S4S and Rough TPI grade Marked � HT Treated. Tel: 912-884-3386. An Interstate Resources Inc. company. RB Lumber LLC a small log sawmill in Riceboro Georgia GA produces Southern yellow pine lumber. Grades #1 #2 #3 and #4 for wholesale. S4S and Rough TPI grade Marked � HT Treated. Tel: 912-884-3386. An Interstate Resources Inc. company. Business Reviews RB Lumber LLC Testimonials