Link to prices after September 2019.
The Denver No. 2 Ultra-Low Sulfur Diesel prices are now part of 2019 Specifications book.
The link address is: https://www.codot.gov/business/designsupport/cdot-construction-specifications/2019-construction-specifications/fuel-cost-adjustments/opis_denver_ultra_low_sulfur_diesel_lub/daily_prices