Allen Lamb, 50, of Sioux Falls, South Dakota passed away unexpectedly Wednesday, March 30, 2011 at Avera McKennan Hospital in Sioux Falls, South Dakota.Funeral services will be 1:00 p.m. Saturday, April 2, 2011 at the Carlsen Funeral Home in Le Mars, Iowa with Reverend Jason Larson officiating. Interment with military honors provided by the Wasmer American Legion Post #241 of Le Mars will be at Memorial Cemetery in Le Mars. Expressions of sympathy can be extended to the family through www.carlsenfuneralhome.com