Botnst,
You appear a smart enough guy to do some basic feasibility calcs.
A fall of at least 6' is necessary if you wish to produce anything worthwhile. If this stream has a waterfall on your place then you are in good shape.
The flow rate will be important depending on how much electricity you wish to harvest. Its kind of pointless if you can only just light 1 globe.
Most year 11 & 12 Physics students should be able to do the calculations or if you can give me your best estimate of the height & flow rate of the water, I would be happy to give you an indication of how much power you can get.

__________________
Grumpy Old Diesel Owners Club group

I no longer question authority, I annoy authority. More effect, less effort....

1967 230-6 auto parts car. rust bucket.
1980 300D now parts car 800k miles
1984 300D 500k miles
1987 250td 160k miles English import
2001 jeep turbo diesel 130k miles
1998 jeep tdi ~ followed me home. Needs a turbo.
1968 Ford F750 truck. 6-354 diesel conversion.
Other toys ~J.D.,Cat & GM ~ mainly earth moving