Water filtration caps stash

The water filtration caps stash is an unmarked location in the Commonwealth in 2287. It is located east of Sanctuary Hills, оn the other side of Misty Lake.

Layout
By flipping the circuit breaker at the riverbank, one can access a filtration unit with a hidden caps stash inside, which contains the following:

Appearances
The water filtration caps stash appears only in Fallout 4.