Fast Facts

An Overview of the SPP System

• Service territory: ~557,546 square miles
  
• Substations: 5,292
• Generation plants: 1,007 (in Integrated Marketplace / SPP Balancing Authority Area)
• Miles of transmission: 72,884
• Coincident peak load: 56,184 MW (8/21/2023)
• Winter peak load: 47,157 MW (12/22/22)
• Accredited Generating capacity: 63,908 MW (based on accredited capacity as of June 2024)
  • 47.5% natural gas
  • 33.6% coal
  • 8.6% wind
  • 4.6% hydro
  • 3.0% nuclear
  • 2.1% petroleum
  • 0.6% solar
  • 0.1% other (biomass, waste heat, etc.)
• 2024 Energy Production by Fuel Type (Jan. 1 - Dec. 31, 2024):
  290,267 GWh 
  • 38.0% wind
  • 28.4% natural gas
  • 24.7% coal
  • 5.3% nuclear
  • 3.1% hydro
  • 0.4% solar
  • 0.1% other

Primary Services Provided to Members and Customers

SPP provides many services to its members and customers. These services include:

• Reliability Coordination:  SPP monitors power flow throughout our footprint and coordinates regional response in emergency situations or blackouts.
• Tariff Administration:  SPP provides "one-stop shopping" for use of the region's transmission lines and independently administers an Open Access Transmission Tariff with consistent rates and terms. SPP processed an average of 6,946 member transmission service requests per month in 2020. 2024 transmission service transactions totaled $5.9 billion.
• Regional Scheduling:  SPP ensures the amount of power sent is matched with power received.
• Transmission Expansion:  SPP's planning processes seek to identify system limitations, develop transmission upgrade plans, and track project progress to ensure timely completion of system reinforcements.
• Market Operations:  The Integrated Marketplace launched in 2014, replacing the Energy Imbalance Service (EIS) market. It includes a day-ahead market with transmission congestion rights, a reliability unit commitment process, a real-time balancing market replacing the EIS market, and the incorporation of price-based operating reserve procurement. SPP's own analysis showed its markets provide participants with net savings of $744.3 million annually.
  
• Training:  SPP offers continuing education for operations personnel at SPP and throughout the region. SPP's 2024 training program delivered more than 42,000 training hours to 345 organizations, representing reliability, train-the-trainer, Integrated Marketplace and transmission settlement courses.