|  | Sources
            of Electricity 
        
          | 
 
 
 
 | Platte
              River uses several sources of electricity generation capacity to
              meet its wholesale obligations to its four owner
              municipalities            including: (1) the coal-fired Rawhide Energy Station Unit 1, (2)
            five natural gas-fired combustion turbines--Units A, B, C, D and
              F at the Rawhide site, (3) the Medicine Bow Wind Project and the
              Silver
            Sage Windpower Project, (4) the coal-fired Yampa Project near Craig,
            Colorado, (Platte River owns 18 percent of Units 1 and 2, (5) federal
            hydropower delivered via purchase from Western Area Power Administration
            and (6) purchases from the wholesale electricity market in the region.
 |  
          |  |  | 
               Rawhide
              Unit One (coal)--280 MW Rawhide
                  Units A, B, C, D, F (natural gas)--388
                MW (summer); 466 MW (winter) Yampa Project
              (coal)--154 MW Federal
                  Hydropower--90 MW (summer); 117
              MW (winter) Medicine
              Bow Wind Project--8 MW Silver
                  Sage Windpower Projcect--12 MWTotal Capacity--940 MW (summer); 1,045 MW (winter)
 |  
          |  |  
          |  | Energy
              Delivered to Platte River's Four Municipalities in 2009--Proportions
          by Source: |  
          |  |  
          |  |  | 
            Coal 79.5% Hydropower 19.6% Wind Power and Renewable Energy Certificates 4.2%                Unspecified
                Purchases 0.4% Natural
                Gas 0.3% |  
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