WATER DRAFTING. 1. PALCO shall utilize the most current NMFS water drafting screen specifications. As of the effective date, the screen specifications described below are the most current and shall be used until they are replaced by NMFS. 2. The screen shall be kept in good repair and shall be used whenever water is drafting (i.e., pumped from the stream into a truck or trailer). 3. The screen face shall be parallel to the flow of the water. 4. The screen shall have an approach velocity of no more than 0.33 foot per second. The approach velocity is the velocity of the water through the screen openings. − The screen shall have at least 12 square feet of open area per cubic foot per second of the maximum diversion rate (12 square feet of screen per 450 gallons/minute). − Round openings shall not exceed 3/32 inch in diameter. − Square openings shall not exceed 3/32 inch measured diagonally. 5. The screen shall be cleaned as often as necessary to prevent the approach velocity from exceeding 0.33 foot per second and to prevent the head differential through the screen from exceeding 2 inches. 6. The diversion rate shall not exceed the inflow rate.
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Sources: Habitat Conservation Plan, Habitat Conservation Plan