1. In 1905, July 11 was the day that construction began on the Hoover Dam, which was then known as the Boulder Dam. The dam, located on the border between Arizona and Nevada, was a monumental engineering feat and helped to provide hydroelectric power to the surrounding area.

2. In 1962, on July 11, the State of Nevada officially began collecting a state sales tax. Prior to this, Nevada was one of the few states without a sales tax.

3. On July 11, 1952, the United States government conducted the first of many above-ground nuclear weapons tests at the Nevada Test Site, located around 65 miles north of Las Vegas. The tests continued until 1962, and the environmental impact of these tests is still being studied today.

4. In 1979, on July 11, two dams collapsed after heavy rainfall near Reno, causing significant flooding in the area. Several people were killed and millions of dollars in damages were reported.

5. On July 11, 1987, a record-breaking heat wave swept through Nevada, with temperatures soaring well above 100 degrees Fahrenheit. The extreme heat led to numerous health concerns, including heat stroke, dehydration, and other heat-related illnesses.