Rivers was born in Au Gres, Michigan, and graduated from Au Gres-Sims High School, Arenac County, in 1975.[2] She was married the day after graduation, and had 2 children by age 21.[3]
Rivers was elected as a Democrat from Michigan's 13th District to the United States House of Representatives for the 104th and to the three succeeding Congresses, serving from January 3, 1995, to January 3, 2003.
After Michigan lost a district in the United States 2000 Census reapportionment, much of her district was merged into a redrawn 15th District together with long-time incumbent John Dingell. Rivers challenged Dingell in the Democratic primary for the new 15th. However, running in a district that was over 65 percent new to her, she lost to Dingell by 18 points.[2]
During her first US House run in 1994, Rivers spoke publicly about her long struggle with bipolar disorder. She was about 21 when she was diagnosed. While in Congress she spoke about her condition on the House floor, making her the first openly bipolar member of Congress.[4][5] In 1998, the National Mental Health Association (NMHA) named her "Legislator of the Year."[6]