Birch: May 31. Elevation above normal, water 70s and murky. For current elevation conditions go to the US Army Corps of Engineers website at https://www.swt-wc.usace. army.mil/BIRC.lakepage. html. Largemouth bass good on crankbaits, jigs and plastic baits around brush structure, points, rocks and standing timber. Crappie good on jigs and minnows around brush structure and along the dam. Report submitted by Jeremy Bersche, game warden stationed in Osage County.