1. On August 4, 1896, Utah was officially admitted as the 45th state of the United States. This followed many years of controversy surrounding the practice of polygamy in the state, which had delayed its admission.

2. The Great Salt Lake Flood of 1983 reached its peak on August 4, causing widespread damage throughout the state. The flooding was caused by heavy rainfall and snowmelt, which caused the Great Salt Lake to overflow and flood nearby areas.

3. August 4, 1892 marked the opening of the Salt Lake City and Ogden Railway, which connected the two cities by rail for the first time. This allowed for greater transportation and commerce between the two cities and ultimately helped to spur economic growth in the region.

4. On August 4, 1986, Utah mining company Bingham Canyon Mine experienced a massive landslide, which destroyed much of the mine's infrastructure and threatened nearby communities. However, due to effective emergency response efforts, no one was injured in the incident.

5. August 4, 1919 was the start of the 10th National Encampment of the Grand Army of the Republic, a veterans organization for Union soldiers who had fought in the American Civil War. The event was held in Salt Lake City and was attended by thousands of veterans from across the country.