Colorado Rates and Tariff Information

Electric Rate Books		Gas Rate Books
Entire Tariff Book		Entire Tariff Book
Electric Commodity Adjustment (ECA)		Gas Cost Adjustment (GCA)
		Rate History - Residential
Steam Rate Books		Rate History - Large Commercial
Entire Tariff Book		Rate History - Small Commercial
		Rate History - Commercial (no longer in effect)
		Rate History - Industrial

View the "Meter Reading Cycle Information" for information about how our billing cycles work and how bills are prorated.

Residential customers: be sure to pay your energy bill on time to avoid late payment fees.

SmartGridCity™ Information

• Pricing pilot

Renewable Information

• Renewable Energy Standard Compliance Plan
• Renewable Energy Standard - Solar Program FAQ (30K PDF)
• Wind Integration Study (4.1 MB PDF)
• Windsource® filing

Rate Case Information

• 2009 Proposed Electric Rate Case
• 2008 Pending Electric Rate Case
• 04 Renewable Energy Standard - Solar Program FAQ (30K PDF)
• Colorado ECA FAQ - January 2008