5. Oroville Dam
In February 2017, heavy rainfall damaged Oroville Dam’s main and emergency spillways, prompting the evacuation of more than 180,000 people living downstream along the Feather River and the relocation of a fish hatchery.
Heavy rainfall during the 2017 California floods damaged the main spillway on February 7, so the California Department of Water Resources stopped the spillway flow to assess the damage and contemplate its next steps. The rain eventually raised the lake level until it flowed over the emergency spillway, even after the damaged main spillway was reopened. As water flowed over the emergency spillway, headward erosion threatened to undermine and collapse the concrete weir, which could have sent a 30-foot (10 m) wall of water into the Feather River below and flooded communities downstream. No collapse occurred, but the water further damaged the main spillway and eroded the bare slope of the emergency spillway.
4. Tacoma Narrows Bridge
The Tacoma Narrows Bridge is a pair of twin suspension bridges spanning the Tacoma Narrows strait of Puget Sound in Pierce County, Washington. The bridges connect the city of Tacoma with the Kitsap Peninsula and carry State Route 16 (Primary State Highway 14 until 1964) over the strait. Historically, the name “Tacoma Narrows Bridge” has applied to the original bridge nicknamed “Galloping Gertie”, which opened in July 1940, but collapsed possibly because of aeroelastic flutter four months later, as well as the replacement of the original bridge which opened in 1950 and still stands today as the westbound lanes of the present-day two-bridge complex.
3. Mexico City Texcoco Airport
Mexico City Texcoco Airport was a planned airport in Mexico City that was meant to become Mexico’s New International Airport (Spanish: Nuevo Aeropuerto Internacional de México—NAICM or NAIM). The project was announced in September 2014 but was canceled in late 2018 after a referendum stating that the new airport should be built at a different location.
President Enrique Peña Nieto first announced Texcoco Airport in his State of the Union Address on September 2, 2014. It was billed as Mexico’s most extensive public infrastructure work in a century and was set to replace Mexico City’s current Benito Juárez International Airport.
In October 2018, after construction had already begun, a non-binding referendum was organized by then President-elect Andrés Manuel López Obrador, in which 69 percent of the 1.067 million voters rejected the planned airport, choosing instead to build a new airport on the grounds of Santa Lucía Air Force Base.
Construction continued for several weeks but was suspended on December 27, 2018, after López Obrador took office. In 2020, the government of Mexico announced that they would convert the 12,000-hectare space where the airport was being built into the Lake Texcoco Ecological Park, which will be a public space and an area of ecological restoration.
2. Vdara Hotel Las Vegas
Vdara Hotel & Spa is a 1.6 million sq ft (150,000 m2) condo-hotel and spa located within the CityCenter complex across from Aria Resort & Casino on the Las Vegas Strip. Vdara opened on December 1, 2009, as a joint venture between MGM Resorts International and Infinity World Development. It is owned by The Blackstone Group and operated by MGM Resorts International.
Vdara’s 57-story, 578-foot (176 m) tower houses 1,495 suites; an 18,000 sq ft (1,700 m2), a two-story spa, salon, and fitness center; a market, and a bar. It also has a 40,000 sq ft (3,700 m2) pool and deck area. Vdara does not contain casino space and, along with Waldorf Astoria, is one of two non-gaming, non-smoking hotels within CityCenter. In 2010, it was discovered that the hotel’s reflective surface and concave design can act as a parabolic reflector that creates conditions of extremely high temperature at the pool deck.
In 2011, Vdara received its first AAA Four Diamond Award.
1. California High-Speed Rail
California High-Speed Rail is a publicly-funded high-speed rail system under construction in the U.S. state of California. Its goal is to connect the Anaheim Regional Transportation Intermodal Center in Anaheim and Union Station in Downtown Los Angeles with the Salesforce Transit Center in San Francisco via the Central Valley, providing a one-seat ride between Union Station and San Francisco in 2 hours and 40 minutes, a distance of 380 miles (610 km). Future extensions are planned to connect southward to stations in San Diego County via the Inland Empire, as well as northward to Sacramento. It will be implemented in a number of self-supporting segments, as resources become available.