Oregon Blue Book. Initiative, Referendum and Recall: 1988-1995. November 6, 1990 - "Prohibits Trojan Operation Until Nuclear Waste, Cost, Earthquake Standards Met". Defeated 40.3% yes, 59.6% no.
Oregon Blue Book. Initiative, Referendum and Recall: 1988-1995. November 3, 1992 - "Closes Trojan Until Nuclear Waste, Cost, Earthquake, Health Conditions Met". Defeated 59.9% to 40.1%.
Oregon Blue Book. Initiative, Referendum and Recall: 1988-1995. November 3, 1992 - "Bans Trojan Power Operation Unless Earthquake, Waste Storage Conditions Met". Failed 42.7% yes to 57.3% no.