This morning I spent a few hours clearing out wild rose bush and honeysuckle and digging out most of the concrete trough. There was some nice soil that I think I will let dry a little then move it to the new location for the greenhouse.
The "sluice gate" has a wheel on one end to control the flow of water into the pool. A pipe was attached to take the water down to the pool.
I am eager to see what we can use this for in the future.