This is a key consideration in any power line project. While the initial capital cost for installing an underground cable system is significantly higher—often several times more than a comparable overhead line—the overall lifetime costs can be more nuanced. The lower cost of materials and simpler installation process make overhead lines the most economical choice for many long-distance and rural applications. underground cables, with their extensive insulation and need for specialized trenching, have a much higher upfront cost but may have reduced long-term operational costs due to less frequent weather-related damage.