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Operational Plan for the Restoration of Diadromous Fishes to the ...

Operational Plan for the Restoration of Diadromous Fishes to the ...

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A portion <strong>of</strong> <strong>the</strong> stream passes <strong>to</strong> <strong>the</strong> east <strong>of</strong> this watercourse, through an<br />

unwadable, muddy lowland swale with no defined channel. Fish exiting <strong>the</strong> lake<br />

via this outlet would descend in elevation but encounter dense thickets <strong>of</strong> brush<br />

and downed trees and shallow, braided stream channels where flow is dispersed<br />

and <strong>to</strong> some extent passes interstitially through substrate, sediment, rootwads, and<br />

brush incapable <strong>of</strong> passing adult sized fish. The areas covered by shallow braids,<br />

marsh and blow down did not lend <strong>the</strong>mselves <strong>to</strong> surveying. The well-defined<br />

stream channel in <strong>the</strong> vicinity <strong>of</strong> <strong>the</strong> road channel was surveyed at a natural<br />

constriction featuring a concentration <strong>of</strong> cobble-sized rocks that could limit<br />

passage at least at lower flows (Figure 5).<br />

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