Dale Kolke / California Department of Water Resources via Reuters
An aerial view of the damaged Oroville Dam spillway is shown. Dams in the US are aging. In fact, the average age of of US dams is 56 years.
America's infrastructure is in dire need of repairs.
According to the American Society of Civil Engineers' 2017 Infrastructure Report Card, which is published every four years, US infrastructure gets a D+ grade. It got the same grade in 2013.
The ASCE estimates the US needs to spend some $4.5 trillion by 2025 to improve the state of the country's roads, bridges, dams, airports, schools, and more.
The report breaks down the state of infrastructure in 16 different categories. Here's a look at each category's final grade, according to the organization.