Colorado. Taxation. Gasoline Bill introduced in General Assembly to raise gasoline tax by two cents per gallon Post F 6, 1976 p.12 The Colorado Senate Transportation Committee kills gas tax boost. Post F 25, 1976 p.30 FEN F 25, 1976 p.8 Senate committee OKs bill to hike state gas tax from 70 to t. RMN Ap 11, 1975 p.5 State, local officials seek 2-cent gasoline tax hike. Post Ja 10, 1977 p.1