2006 Pre-Construction Eelgrass Monitoring and Propagation for King County Outfall Mitigation

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This report summarizes pre-construction acitivities conducted in 2006 by Pacific Northwest National Laboratory (PNNL) in support of the Brightwater Treatment System marine outfall. Activities included continued propagation of eelgrass shoots and monitoring of the experimental eelgrass harvest plots in the marine outfall corridor area to evaluate recovery rates relative to harvest rates. Eelgrass densities were monitored in the five experimental harvest plots in 2006 and changes in density were evaluated with previous data collected in 2004 and 2005. Additional eelgrass shoots were harvested from the outfall site in 2006 and transported to the offsite holding and propagation tank at the PNNL Marine Sciences Laboratory in Sequim.

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2006 Eelgrass Monitoring Report