"John Gilmer" wrote in message
"Bob Noble" wrote in message
...
It looks more to me like that is a bridge used to support a big pump for
some kind of irrigation. Note the pump in the middle with the overhead
to rise the pump.


I suspect that the "bridge" served to hold a "hydralic ram" which uses the
velocity of the water to pump a small portion of the water to the level of
the surrounding fields.

Nope. Hydraulic rams need a head of water above the pump so that the water
drops into the ram. - its the action of the water falling into the ram that
makes the pumping happen.