Six Flags Great America ride reliability

1. 1Big Easy Balloons8d 18h lost · 4 breakdowns · down on 28 of 29 days 20.1%
2. 2AQUAMAN™ Splashdown8d 2h lost · 33 breakdowns · down on 29 of 29 days 24.1%
3. 3Roaring Rapids7d 8h lost · 22 breakdowns · down on 29 of 29 days 30.6%
4. 4Scenic Railway County Fair Station5d 23h lost · 36 breakdowns · down on 29 of 29 days 44.5%
5. 5American Eagle Red Side5d 1h lost · 39 breakdowns · down on 28 of 29 days 53.9%
6. 6Maxx Force5d 8h lost · 32 breakdowns · down on 29 of 29 days 54%
7. 7American Eagle4d 20h lost · 30 breakdowns · down on 29 of 29 days 54.6%
8. 8Demon4d 14h lost · 39 breakdowns · down on 28 of 29 days 55.4%
9. 9Krazy Kars4d 16h lost · 22 breakdowns · down on 29 of 29 days 56%
10. 10Sprocket Rockets3d 14h lost · 28 breakdowns · down on 28 of 29 days 66.3%
11. 11Sky Trek Tower3d 7h lost · 22 breakdowns · down on 29 of 29 days 70.5%
12. 12Little Dipper3d 4h lost · 25 breakdowns · down on 28 of 29 days 72.6%
13. 13River Rocker2d 21h lost · 26 breakdowns · down on 29 of 29 days 73.1%
14. 14Sky Striker2d 21h lost · 88 breakdowns · down on 29 of 29 days 73.6%
15. 15Bouncer2d 15h lost · 22 breakdowns · down on 28 of 29 days 74.4%
16. 16Up, Up & Away2d 11h lost · 10 breakdowns · down on 28 of 29 days 75.7%
17. 17Lady Bugs2d 10h lost · 19 breakdowns · down on 28 of 29 days 75.9%
18. 18Tot's Livery2d 10h lost · 15 breakdowns · down on 28 of 29 days 76.1%
19. 19Whizzer2d 18h lost · 40 breakdowns · down on 29 of 29 days 76.5%
20. 20Krazy Kups2d 9h lost · 12 breakdowns · down on 28 of 29 days 76.6%
21. 21Red Baron2d 8h lost · 11 breakdowns · down on 28 of 29 days 76.9%
22. 22ZoomJets2d 8h lost · 10 breakdowns · down on 28 of 29 days 77%
23. 23Viper2d 3h lost · 19 breakdowns · down on 29 of 29 days 81%
24. 24Chubasco1d 20h lost · 24 breakdowns · down on 29 of 29 days 81.9%
25. 25Condor1d 21h lost · 10 breakdowns · down on 28 of 29 days 82.2%
26. 26Wrath of Rakshasa1d 23h lost · 42 breakdowns · down on 28 of 29 days 83.1%
27. 27THE JOKER™ Free-Fly Coaster1d 20h lost · 37 breakdowns · down on 29 of 29 days 83.4%
28. 28X Flight1d 14h lost · 48 breakdowns · down on 29 of 29 days 84.8%
29. 29Giant Drop1d 16h lost · 22 breakdowns · down on 29 of 29 days 85%
30. 30The Lobster1d 14h lost · 12 breakdowns · down on 29 of 29 days 85.4%
31. 31THE FLASH™: Vertical Velocity1d 10h lost · 31 breakdowns · down on 29 of 29 days 86.4%
32. 32Goliath1d 9h lost · 37 breakdowns · down on 29 of 29 days 87.2%
33. 33Raging Bull1d 8h lost · 50 breakdowns · down on 29 of 29 days 87.7%
34. 34Fiddler’s Fling1d 6h lost · 20 breakdowns · down on 29 of 29 days 88.1%
35. 35Ricochet1d 6h lost · 30 breakdowns · down on 29 of 29 days 88.3%
36. 36BATMAN™: The Ride1d 5h lost · 31 breakdowns · down on 29 of 29 days 88.3%
37. 37Rue Le Dodge1d 4h lost · 11 breakdowns · down on 28 of 29 days 88.6%
38. 38JUSTICE LEAGUE™: Battle for METROPOLIS1d 5h lost · 36 breakdowns · down on 28 of 29 days 88.7%
39. 39SUPERMAN™: Ultimate Flight1d 4h lost · 26 breakdowns · down on 29 of 29 days 89.5%
40. 40THE DARK KNIGHT™ Coaster1d 1h lost · 9 breakdowns · down on 28 of 29 days 91.1%
41. 41DC Super-Villains Swing™19h 14m lost · 10 breakdowns · down on 28 of 29 days 92.6%
42. 42Triple Play16h 24m lost · 11 breakdowns · down on 28 of 29 days 93.9%
43. 43Hometown Fun Machine15h 46m lost · 8 breakdowns · down on 29 of 29 days 94.1%
44. 44Columbia Carousel14h 20m lost · 13 breakdowns · down on 28 of 29 days 94.6%

Breakdowns cluster at 5pm, with 152 of the 1,111 closures that started before the park's final hour beginning then - so the ride you most want is safest earlier in the day, not saved for last. A further 439 rides simply were not running at opening, which is a late start rather than a fault and is counted separately. The other 11 closures start in the 11pm hour, when the park is shutting - those are rides finishing their day, not failing, so they are left out here.

The worst day in this window was 11 Aug, when 75.2% of the park's ride hours were lost and 45 of 45 rides went down at some point.