Just weeks before Hurricane Ida knocked out power to much of Louisiana, leaving its residents exposed to extreme heat and humidity, the chief executive of Entergy, the state’s biggest utility company, told Wall Street that it had been upgrading power lines and equipment to withstand big storms.
“Building greater resiliency into our system is an ongoing focus,” the executive, Leo P. Denault, told financial analysts on a conference call on Aug. 4, adding that Entergy was replacing its towers and poles with equipment “able to handle higher wind loading and flood levels.”
Mr. Denault’s statements would soon be tested harshly. On the last Sunday in August, Hurricane Ida made landfall in Louisiana and dealt a catastrophic blow to Entergy’s power lines, towers and poles, many of which were built decades ago to withstand much weaker hurricanes. The company had not upgraded or replaced a lot of that equipment with more modern gear designed to survive the 150 mile-an-hour wind gusts that Ida brought to bear on the state.
A hurricane like Ida would have been a challenge to any power system built over many decades that contains a mix of dated and new equipment. But some energy experts said Entergy was clearly unprepared for the Category 4 storm despite what executives have said about efforts to strengthen its network.
a Category 2 storm, according to an analysis of regulatory filing and other company records by McCullough Research, a consulting firm based in Portland, Ore., that advises power companies and government agencies.
Entergy said that analysis was inaccurate but wouldn’t say how many of its transmission structures were built to withstand 150 mile-per-hour winds. The company has said that its towers met the safety standards in place at the time of installation but older standards often assumed wind speeds well below 150 m.p.h.
The Institute of Electrical and Electronics Engineers, a professional group whose guidelines are widely followed by utilities and other industries, recommends that power companies that operate in areas vulnerable to hurricanes install equipment that can withstand major storms and return service quickly when systems fail. In coastal areas of Louisiana, for example, it says large transmission equipment should be designed to withstand winds of 150 m.p.h.
growing ferocity of hurricanes. The company says it had acted with alacrity. Its critics contend that it dragged its feet.