1.21 Gigawatts Mystery Cache

The cache is not at the posted coordinates, but is not too far away. Solve the puzzle to get the correct coordinates. Only the last 3 digits of the North and West coordinates will need to be changed. You will need some kind of watercraft to reach the cache. Do NOT try to access from land!

1.21 gigawatts (or jigawatts depending on how you pronounce it) may seem like an arbitrary movie quote, but it’s actually a very achievable level of electricity, if even for a second. All of the following numbers produce 1.21 gigawatts! (I didn't do the math on these, but someone did...I'm sure it's just some kind of crazy multiplying factor.)

10% of a space shuttle launch

60% of the Hoover Dam

484 wind turbines

8,066,666,670 spinning hamster wheels

6,050,000 bike riders

8,066,667 solar panels

10 jet engines

1,621983 horses

And of course, 1 lightning bolt

You can validate your puzzle solution with certitude.