Merwin
FYI as posted on another site....
February 23, 2010
ARIEL, Wash. — Federally required testing and maintenance work on Merwin Dam’s spillway gates will require PacifiCorp to begin lowering the Merwin reservoir level by 27 feet beginning Feb. 22 and reaching its lowest point March 3.
This drawdown will mean that for about 20 days, the Speelyai Park public boat ramp will be unusable and the park will be closed. Any privately moored boats along the shoreline will become beached. While flows on the Lewis River below the dam will increase during this time, PacifiCorp is taking care to ensure that these increases will not alter river use.
Under PacifiCorp’s license to operate the Lewis River dams, PacifiCorp needs to test the spillways of its facilities every five years to make sure that they can be fully opened should that be necessary in an emergency. To do so without greatly increasing downriver flows, the drawdown must be done gradually. After the spillways are tested and any necessary maintenance work performed, the reservoir can be gradually refilled. Depending on weather conditions, the lake level should be restored and the ramp and park should be re-opened by March 13.