Colorado Springs Utilities has proposed a 2015 budget that includes heavy spending for new air emissions controls for its coal-fired Nixon and Drake power plants.
The Colorado Springs City Council is looking at these budget proposals under a schedule that culminates on Dec. 9. The municipal utility’s coal units are Drake 5 (46 MW), Drake 6 (77 MW), Drake 7 (131 MW) and Nixon 1 (208 MW).
The 2015 budget proposals for those emissions controls are: Nixon Unit 1 Sulfur Dioxide Reduction, $34,798,764.
Procure and install an SO2 scrubber. The EPA Regional Haze Rule requires a SO2 scrubber be constructed on the Nixon 1 coal unit. The scrubber supplier will be selected using a competitive process. Installed scrubber will be commercially operable in 2017. Drake Unit 6 Sulfur Dioxide Reduction, $12,082,056. Procure and install SO2 scrubber. Best Available Retrofit Technology (BART) and the Regional Haze Rule requires a SO2 scrubber be constructed on the Drake 6 coal unit. Neumann Systems Group NeuStream technology is being constructed on the Drake 6 coal unit. Drake Unit 7 Sulfur Dioxide Reduction, $12,082,056. Procure and install a SO2 scrubber. BART
and the Regional Haze Rule requires a SO2 scrubber be constructed on Drake 7. Neumann Systems Group NeuStream technology is being constructed on the Drake 7 coal unit. Drake Scrubber(s) Sorbent Processing System, $12,082,056. Procure and install an SO2 scrubber. BART and the Regional Haze Rule requires an SO2 scrubber be constructed on the Drake 6 and Drake 7 coal units. The Sorbent Processing System is a shared component between the Drake 6/Drake 7 NeuStream SO2 scrubbers.
Other power plant spending is included in the 2015 capital plan, including: Front Range 1-3 Blade Row, Buckets and Nozzles Replacement, $4,972,512. Replacement of the Front Range Power gas turbines. First, second and third stage bucket and nozzle replacement. Drake 7 Rebag Baghouse, $800,004. Replace all bags in the Drake 6 fly ash removal bag house. The existing bag house reached its useful life and is experiencing high failure levels impacting plant operating costs. Drake 5 Condenser Tube Replacement, $750,000. Replacement of the Unit 5 condenser tubes. The condenser tubes have reached their useful life and are experiencing failure rates that are impacting unit reliability. Nixon 1 Control System Replacement, $500,004. Replace the Nixon Unit 1 computerized distributed control system. The existing system was installed in 2000 and is obsolete. Nixon Impoundment Retrofit, $500,004. Changes in Colorado solid waste regulations will require some existing impoundments (process water ponds) to be upgraded. Nixon Zero Discharge Controls Replacements, $350,004. Replacement of obsolete programmable logic controller input and output cards and backplanes for the zero discharge plant. Nixon 1 Pulverizer Major Component Replacement, $300,000. Routine maintenance to replace major components in coal pulverizers. Drake 6 High Pressure Feedwater Heater #4&5, $300,000. Replace tube bundles on #4&5 high pressure feed water heaters. These tube bundles have reached their useful life and are experiencing failure rates impacting unit reliability. Drake Pulverizer Major Component Replacements, $285,000. Drake’s EL-76/EL-70 Ball Pulverizers and Riley Hammer Pulverizers require periodic replacement of major components such as classifiers, yokes, etc. Drake 7 Boiler Casing Rework, $249,996. Replace portions of the Drake 7 boiler casing to stop fugitive fly ash and flue gas from leaking into the boiler building. Drake Coal Unit Train Unloading Facility Stack Out Belt Replacement, $234,996. Replace 72”-wide Coal Unit Train Unloading Facility (UTUF) stack out belt. Drake Station Improvements, $230,004. Capital expenditure to purchase, and install replacement equipment that fails unexpectedly and meets the capital definition. Nixon 1 Station Improvements, $200,004. Capital expenditure to purchase, and install replacement equipment that fails unexpectedly and meets the capital definition. Drake 5 Burner Management System Upgrades, $150,000. Replace the Burner Management System for the unit boiler operation, improving unit safety and reliability. Manitou Generator Step-Up Transformer, $125,004. Install Generator Step-Up Transformer that was procured in 2014 at the Manitou Hydroelectric plant.
The proposed 2015 budget also covers anticipated fuel costs. In 2015 approximately 2.5% more MWh coal unit generation is planned compared to 2013. In the fall of 2013 Drake Unit 7 was unavailable due to an extended major power plant outage. The remainder of this variance is due to increases in 2015 projected coal prices.