A week and half ago, I got to spend two days at Fort Worden, a (very) little of which actually got spent on the beach. This is a familiar site (searching the blog for Fort Worden or Point Wilson turns up some related posts) and one I often use to illustrate how structures can impede littoral drift and how shorelines respond.
AERIAL VIEW
The Port Townsend Marine Science Center now occupies the end of the pier, but the structure itself has a long military history associated the Fort. At some point, planks were placed between the pier's pilings, most likely to reduce sedimentation in the small boat basin tucked in behind it. This resulted in a wide beach accumulating on the south side (sediment arrives from Port Townsend and the Chetzamoka Bluffs from this direction), and a substantial offset in the shoreline to the northeast (towards Point Wilson itself).
Every decade or so, people start wondering whether something can be done to alleviate some of the inconvenient geomorphic ramifications of the pier (and the associated boat basin and launch ramp). Trouble is, some things are hard to undo without creating other problems.
Wednesday, November 28, 2018
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