Grinders and Locations

Grinders are barriers between locations. They take a long time to break so make sure you have a good drill!!! The devs spell girder wrong.

Grinders  List
Update: Since the Dec 2018 update girders seem to be a thing of the past. There are no longer girders (at least at 399 and above)

Note: Listed times are just the tested time, and they are not exact. In addition, the hours vary on your drill speed, which varies based on drill upgrade level, premium subscription, crystal upgrades, active assistants, boosters, etc.

Note: this list is expected to never end. The deeper we drill, the more girders we will discover. Please update as appropriate.
 * 1) 10 km, 30 seconds
 * 2) 26 km, 29 minutes
 * 3) 50 km, 3.5 hours
 * 4) 84 km, unknown
 * 5) 114 km, 7 hours
 * 6) 127 km, unknown
 * 7) 142 km, 16.2 hours
 * 8) 156 km, 21.6 hours
 * 9) 200 km, 109 hours
 * 10) 240 km, 119 hours
 * 11) 275 km, unknown
 * 12) 315 km, 600 hours
 * 13) 345 km, unknown
 * 14) 399 km, unknown
 * 15) 424 km, unknown
 * 16) 450 km, unknown
 * 17) 500 km, unknown

Locations
As you dig dipper, digging takes more time, so make sure you have a good drill!!! Upgrade your Drilla as much as you can!!!