If you sit down for a weekend and write a one shot project that's never going to be used in production 1500 LOC is more than doable, especially as a college student where you sometimes can go many weeks without doing anything productive.

Sitting at a desk for 6-8 hours every weekday with an editor in front of you has this weird demotivating effect. Add to that all the unit tests (and general need for stuff to actually work well the first time), documentation, and not being able to just run off and build what ever you feel like and you get closer to 30-45 LOC.