California Air Resources Board 2004 Almanac (web) Plumas County Appendix D Mountain Counties Air Basin Population and VMT Table D-21 Parameter 1980 1985 1990 1995 2000 2005 2010 Population 17400 18600 19800 20800 20800 21900 22700 Avg. Daily VMT/1000 350 403 562 615 667 736 818