COLORADO SALES TAX EXEMPT CHANGES
Effective March 1, 2010 through June 30, 2012 sales and purchases of electricity, coal, gas, fuel oil, steam, coke, or nuclear fuel used in processing, manufacturing, mining, refining, irrigation, construction, telegraph, telephone, and radio communication, street transportation services, and all industrial uses are not exempt from the 2.9 percent state sales and use tax.
These changes apply ONLY to Colorado state sales and use tax, not to any city, county or special district taxes. Please click this link to see the complete document.
http://www.colorado.gov/cs/Satellite/Revenue/REVX/1251571250720

