So there is this creek that is unnamed and unmapped. It springs up out of the ground at the head and at the end it goes right back into the ground from whence it came.

In the center of the mile long stream there is a series of large waterfalls, one is a 5 foot drop that is a total free fall for the water; a true water fall.

There are several other ranging between five to twenty feet where the water rushes down a groove in the bed rock.

There is a healthy population of Brook Trout in the lower half, there did not seem to be any in the mid-section waterfalls/pools.

I haven't yet checked the upper section for trout.

What's going on here? Think there would be trout above the falls? Why aren't there trout in the falls? How high can a trout jump if it were to try and migrate up the falls?

What happens at the tail of this creek where the water pools up at the bottom and just seems to stop flowing. There is a good flow throughout the river but the final hole just stops. Is there a tube under the ground or does the water flow through a semi-permeable layer of silt/dirt/rock.

About 50 feet below the final pool, the water emerges again but with barely any flow, I have not yet checked this section for trout.

If the falls are impassible and the creek seeps back into the ground at the bottom, than this entire population of Brookies is self contained within this half mile stretch of stream.

What do you guys think? I am looking for any insight based on what I've said here as I will take this streams location with me to the grave.

Two main questions: how high of a waterfall can a brook trout jump? How does a pretty solid flow just vanish into the ground.