Manipulation of Mill Pond Gates to Reduce River Flow

Power dam gates will be closed by the week-end or the first of next week and the level of the Mirror pond will slowly mount toward normal, power company officials announced today. However, before the gates are closed the direct flow of the river will be reduced to a minimum, to permit of final work in placing new facing on the lower part of the dam.

The flow of the river will be cut In this manner: Mill companies, cooperating with the power company, will release water from the upstream mill pond, then the gates will be closed, shutting off most of the water. However, not all the flow of the river can be cut off, and a stream, greatly reduced, will meander through the mudflats. However, the flow will be sufficiently low to permit of the completion of work on the lower facing on the dam.

The direct flow of the river has already been reduced through upstream dlveralon and storage at Crane prairie. Closing of the main pond gates, after the pond has been partly drained, wlll cut down the flow for about an hour, It Is estimated. On Tuesday, this method of reducing the flow was successfully used.

When the lower facing on the dam just north of the Newport avenue bridge is completed, it will be possible to impound water in the Mirror pond, and this will be done while work on the top part of the dam is being completed, it was indicated by power company officials. The Mirror pond will not reach its normal level until all repair work is completed.

It was a week ago tomorrow night that first water was released from the dam, and repair work was at once started.

There was some difference of opinion today as to whether ducks are flying upstream and into the range of hunters’ guns as a result of the draining of the Mirror pond. The general opinion is that ducks and geese are still ln the channel in considerable numbers, but are not asnoticeable as when the basin is filled.

City officers have announced that no attempts will be made to rid the basin of aquatic weeds, declaring that similar attempts in the past, when the water was out of the pond proved ineffective.

Source: Bend Bulletin ©1941

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