COUNCIL BLUFFS, Iowa (AP) – An Omaha, Neb., woman has been sentenced to 80 months in federal prison for her role in an Iowa-based conspiracy to make methamphetamine. The U.S. attorney’s office says 35-year-old Jennifer Biggerstaff was sentenced on Nov. 4 in U.S. District Court. She pleaded guilty in August to conspiracy to manufacture methamphetamine. Prosecutors say she participated in a scheme in which 5 1/2 pounds of methamphetamine was made at a farm in rural Mills County between February 2003 and May 2011. They say Biggerstaff and others involved in the conspiracy bought pseudoephedrine from stores in Iowa, Nebraska and Missouri, with the popular decongestant being used to make methamphetamine. Others also stole anhydrous ammonia in southwest Iowa. Three others have already been sentenced in connection with the case. Three others await sentencing.