Homestead Hydro Power: Build Your Own Water-Power Plant

Harness the power of your stream and forget the electric company. This is the first of three installments of the five-part article printed by Popular Science that very concisely sketched out every step for establishing a small water-power plant on a farm or homestead.

This table shows the quantity of water passing over a rectangular weir in cubic feet per minute (cfm) for each inch of notch width.  Depth D is read as a combination of the lefthand column and the top row.  For example, if the depth over your stake is 5 3/8 follow over 5 (fifth row) to 3/8 (fourth coumn), and read the value as 5.01 cfm. Don't forget that this figure should now be multiplied by the width in inches of your notch.