OVERVIEW
Much of the U.S. energy system predates the turn of the 20th century. Most electric transmission and
distribution lines were constructed in the 1950s and 1960s with a 50-year life expectancy, and the more
than 640,000 miles of high-voltage transmission lines in the lower 48 states’ power grids are at full
capacity. Energy infrastructure is undergoing increased investment to ensure long-term capacity and
sustainability; in 2015, 40% of additional power generation came from natural gas and renewable
systems. Without greater attention to aging equipment, capacity bottlenecks, and increased demand, as
well as increasing st
orm and climate impacts, Americans will likely experience longer and more frequent
power interruptions.
CAPACITY & CONDITION
Near-term, U.S. energy systems are projected to deliver sufficient energy to meet national demands in
the near term, as energy c
onsumption fell slightly, from 98 quadrillion British thermal units (Btu) in 2014
to 97.7 quadrillion Btu in 2015, and is estimated to grow at a modest rate, averaging 0.4% per year from
2015 through 2040.
In general, the capacity and condition of energy systems depend on ownership and
geographic region, with privately-owned sources in the best position to invest.
Reduced electric demand, changing delivery costs, and new regulations, including those focused on reducing environmental impact, have prompted transformations across the sector in recent years, with […]
