Fourth Annual Report: 2007 Pre-construction Eelgrass Monitoring and Propagation
for King County Outfall Mitigation
About this Document
This report summarizes pre-construction acitivities
conducted in 2007 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 2007 and changes in
density were evaluated with previous data collected in 2004, 2005 and 2006.
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4th Annual Eelgrass
Monitoring Report