• How to Build a Log Jam, part 1

    July 21, 2010

    Yesterday work began in earnest on the creation of an artificial log jam in the Hama Hama River. The log jam, a project of the Hood Canal Salmon Enhancement Group, is designed to protect a salt water marsh from erosion.

    In the first phase of the project, an excavator created a giant berm that will divert the river into a single channel so that the log jam can be assembled on the dry southern half of the riverbed.

    httpv://www.youtube.com/watch?v=axjNXf3MVls

    backhoe

    berm

    pile

    Above: the pile of logs and ecology blocks that they’ll use to assemble the engineered log jam.

    salt-marsh

    The salt marsh they’re trying to protect.

    { 2 comments… read them below or add one }

    Bruce July 22, 2010 at 6:37 am

    Way cool. It will be interesting to watch this develop in the years to come.

    Across Frenchmans Cove from us, the DNR bought 134 acres w/waterfront a couple of years ago. There was a house/bulkhead that had been there for years and years and a stream that had been artificially diverted to run an old hydro electric generator. Over the last two years, DNR dismantled the house, removed the bulkhead, brought in all kinds of big logs and then re-diverted the stream. Goal is to recreate what was taken away (at least 100 years ago) and let nature take it’s course. High tides and wind the past two years have already started to alter what it looks like over there. Google Earth still shows the house and bulkhead prior to the work.

    Reply

    Oyster Fan July 22, 2010 at 11:45 am

    That sounds like a spendy undertaking. It will be interesting to see what happens! But I worry that it’s just a drop in the bucket compared to how much habitat has been lost.

    Reply

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