1. In 1969, the University of Washington College Republicans held a "Hard Hat Riot" in response to anti-war protests on campus. The College Republicans marched with construction workers and brawled with student protesters, resulting in several injuries and arrests.

2. On October 15, 1991, famed grunge band Nirvana released their second studio album, "Nevermind." The album would go on to become a cultural touchstone of the 1990s and cement the band's place in rock history.

3. In 1978, the Seahawks played their first Monday Night Football game at the Kingdome against the Los Angeles Raiders. The game ended in a 34-21 loss for the Seahawks, but it marked a significant moment in the team's early years in the NFL.

4. On October 15, 1933, the construction of the Grand Coulee Dam in Central Washington began. The dam, which would take over a decade to complete, became a major source of hydroelectric power in the Pacific Northwest and a symbol of American industrial might.

5. In 2004, Seattle Sonics player Rashard Lewis signed the largest contract in team history at the time, worth $60 million over six years. The signing was seen as a major investment in the Sonics' future, but the team would ultimately relocate to Oklahoma City in 2008.