Thursday, October 07, 2010

Twanoh State Park

Twanoh State Park is perched on the delta of Twanoh Creek, along the south shore of Hood Canal. The shoreline of this part of Hood Canal (not really a canal) is heavily built with homes, perhaps obscuring an interesting geologic history, since they may be built on a raised terrace resulting from late Holocene earthquakes. Various characteristics of this shoreline suggest that it was elevated at some point, or points, in the past.

The parking lot and boat ramp on the west side are built on top of the original beach (if there ever was much of one) and the stream delta. What isn't covered by pavement is covered with broken riprap, but fortunately today's tide kept that out of sight. There's a small beach, with wrack lines of oyster shell and leaves and eelgrass, just west of the ramp (and featured in one of the first posts in this blog, way back in late 2005 -- Hood Canal).

On the east side, there's a nice gravel beach swash-aligned with the maximum fetch from the east, and a long narrow lagoon that's been modified and plumbed for children (the old maps show with an inlet near the tip of the point). Discussions today were around what might be done to improve the ecology without jeopardizing either the recreational uses or the 1930s Civilian Conservation Corps landscape and historic stone structures.

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