Electrical Infrastructure Rehabilitation Case Study

Problem

Wind Cave National Park faced substantial challenges with its aging power infrastructure, which posed significant safety, environmental, and operational risks. Key issues identified included:

• Aging Infrastructure: The 2400-volt primary power system, along with the low voltage distribution system, transformers, control panels, distribution panelboards, conduit wiring, and lighting circuits and fixtures, was severely outdated. The age and condition of these components compromised the reliability and efficiency of the power supply.
• Environmental Hazards: The high humidity environment of the cave accelerated the deterioration of the power system. Corrosion and unsafe conditions were prevalent, endangering both staff and visitors. 
• Safety and Compliance: The existing power system failed to meet National Electric Code (NEC) requirements. This non-compliance posed significant safety risks, including potential electrical faults and fire hazards.
• Biological Issues: The unnatural light and heat generated by the existing light fixtures disrupted the cave’s ecosystem. This interference with the natural environment of the cave led to adverse biological impacts.

Solution

To address these critical issues, HECO Engineers undertook a thorough and comprehensive rehabilitation of Wind Cave National Park’s power system. The project involved multiple facets of electrical engineering and infrastructure renewal to ensure long-term functionality, safety, and compliance:

• Primary Power System: HECO Engineers installed new conductors and conduit for the primary power system, replacing the outdated and corroded components to enhance reliability and safety.
• Distribution Upgrades: The distribution panels, lighting control panels, disconnects, and transformers were all replaced. These upgrades ensured a compliant electrical distribution network capable of meeting current and future demands.
• Secondary Power System: A new secondary power system was installed, including the replacement of conductors, conduit, and necessary accessories. This upgrade improved the overall efficiency and reliability of the power distribution within the cave.
• Lighting Improvements: New light fixtures were installed for trail lighting and cave feature lighting. These fixtures were selected to minimize heat generation and provide appropriate illumination levels, reducing the impact on the cave environment.
• Infrastructure Renewal: The concrete walks within the cave were replaced to accommodate the new embedded conduit and wiring. This renewal process ensured a seamless integration of the new electrical infrastructure without compromising the cave’s structural integrity.
• Backup Power: A properly sized generator was installed, along with a new transfer switch and distribution panelboard. This backup power solution ensured uninterrupted power supply during outages, enhancing the reliability and safety of the park’s operations.

Results

The comprehensive power system rehabilitation project at Wind Cave National Park resulted in significant improvements, addressing the key issues and enhancing the overall infrastructure:

• Safety: Compliance with National Electric Code requirements was achieved, significantly enhancing the safety. 
• Reliability: The installation of new power components and a backup generator ensured a reliable and consistent power supply. This reliability is crucial for maintaining park operations and visitor experiences.
• Environmental Protection: The use of appropriate lighting and improved electrical components reduced the impact on the cave’s ecosystem. This protection is vital for preserving the natural environment of Wind Cave.
• Sustainability: The modernization of the power infrastructure provided a sustainable solution that supports long-term operational efficiency and environmental stewardship.

Successful Power System Rehabilitation

The Wind Cave National Park power system rehabilitation by HECO Engineers significantly improved the safety, reliability, and environmental conditions of the cave’s infrastructure. The comprehensive upgrade ensured compliance with national standards and provided a sustainable power solution for future needs.

If you have a similar need or would like a free 30-minute review of your upcoming project, please call or email HECO Engineers today.