A walk around Wappinger Lake brought me to the old penstock controls:
Still meshed after all these years:
The “new” penstock intake control, a pair of utterly practical and totally non-photogenic screw drives, sits just to the left of these relics.
A night view of the penstock from some years ago:
It still carries water to the recently refurbished power plant downstream on the right.
Those gears will remain meshed after everything else rots away …