NAICS 221121 - Electric Bulk Power Transmission and Control
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What is NAICS 221121
NAICS code 221121 covers establishments primarily engaged in operating electric bulk power transmission systems and controlling the transmission of electricity from generation sources to distribution centers or other electric utilities. Businesses in this sector manage high-voltage transmission lines and transformer stations, ensuring reliable and efficient delivery of electric power across large geographic areas. These entities play a critical role in maintaining grid stability, regulating voltage levels, and facilitating inter-utility power transfers. Government agencies contract for these services to support national energy infrastructure, ensure grid resiliency, and implement modernization projects aligned with energy policy goals. The sector includes both investor-owned utilities and public power entities that require specialized operational expertise and infrastructure management capabilities to meet regulatory and emergency response demands.
Industry Classification for NAICS 221121
This U.S. industry comprises establishments primarily engaged in operating electric power transmission systems and/or controlling (i.e., regulating voltages) the transmission of electricity from the generating source to distribution centers or other electric utilities. The transmission system includes lines and transformer stations.
Breakdown for NAICS 221121
- Focuses on operating electric power transmission systems and voltage regulation.
- Includes management of high-voltage transmission lines and transformer stations.
- Involves ensuring reliable delivery of electricity from generators to distribution centers.
- Subject to oversight by federal and state regulatory agencies.
- Typical projects include transmission line upgrades and system control enhancements.
- Small business size standard generally defined by employee count or revenue thresholds.
Included Activities for NAICS 221121
- Operating and maintaining high-voltage electric transmission lines.
- Regulating voltage levels across the transmission network.
- Monitoring and controlling power flows to ensure grid stability.
- Upgrading and modernizing transmission infrastructure components.
- Coordinating with electric utilities and grid operators for power transfers.
- Implementing smart grid and advanced control technologies.
- Conducting system reliability assessments and compliance reporting.
- Responding to emergencies and restoring transmission services.
Business Types for NAICS 221121
- Investor-owned electric utilities
- Public power authorities and cooperatives
- Transmission system operators (TSOs)
- Specialized electrical infrastructure service providers
- Grid modernization technology firms
- Utility consulting and engineering companies
Subcategories for NAICS 221121
- Electric power control
- Electric power transmission systems
- Transmission of electric power
Government Buyers for NAICS 221121
Federal, state, and local government agencies frequently contract with electric bulk power transmission operators for services related to grid reliability, infrastructure upgrades, and emergency response. Key buyers include the Department of Energy (DOE), Federal Energy Regulatory Commission (FERC), state public utility commissions, and military installations requiring secure and resilient power delivery. These agencies need transmission services to support critical facilities, improve grid interoperability, implement smart grid technologies, and comply with environmental and reliability standards. Additionally, government-funded infrastructure programs often engage these businesses to upgrade aging transmission assets or expand capacity to meet growing energy demands.
Contract Types & Procurement for NAICS 221121
Contracts in this sector commonly include firm-fixed-price agreements for transmission system upgrades, cost-reimbursement contracts for research and development related to grid technologies, and indefinite-delivery/indefinite-quantity (IDIQ) contracts for ongoing maintenance and operational support. Procurement methods range from competitive bidding to negotiated contracts, often under utility regulatory oversight. Typical contract values vary widely depending on project scope, ranging from hundreds of thousands for specialized control system services to multimillion-dollar contracts for large-scale transmission line construction or modernization projects. Long-term contracts are common due to the extended lifecycle and critical nature of transmission infrastructure.
Details for NAICS 221121
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