Laserfiche WebLink
will create a saltmarsh atmosphere that will be planted to <br /> Lyngby ' s sedge Carex lyngbyei and tufted hairgrass Deschampsia <br /> caespitosa . Other plants which are expected to invade the area <br /> once it changes from the existing freshwater situation to a <br /> brackish-salt situation are Pacific silverweed , saltgrass , <br /> gumweed, and springbank clover . This combination with the <br /> mudflats that will be exposed at all tides lower than 0 . 0 <br /> should increase the wildlife value over existing conditions . <br /> The dike bank blackberry will remain and provide the same <br /> habitat components as now exist. <br /> 2 . The highway runoff ditch and detention pond will De modified <br /> to create a grass lined swale that supplies the same volume of <br /> flood water storage but creates a biofiltering system to <br /> improve the quality of the runoff before it reach the slough . <br /> Two alternatives are offered . <br /> 1 . The entire pond area would be eliminated to reduce the <br /> summer water quality problems and to act as a tradeoff for <br /> lands needed along the highway right-of-way for the swale <br /> system. The existing runoff ditch, from the newly constructed <br /> dike for the intertidal area north, will be converted .from a <br /> straight banked ditch to a shallow sloped banked swale that <br /> will be planted to grasses and rushes . (Drainage Plan) . The <br /> storage capacity of the combined swale will be equal to the <br /> required storage in the existing pond. However, the waters <br /> would only stand during the winter and other periods of high' <br /> rainfall . The bottom will be sloped to the tidegate so the <br /> entire area can drain during extended periods of low tides and <br /> 4R 1 <br /> 1;00,445 <br /> .11• <br /> 41. ° <br /> I <br />