along Boeing Creek in Boeing Creek Park is an intact native ecosystem, mostly free of invasive species. There are a number of mature conifers that escaped being logged, including tall Douglas-fir and Western White Pine trees. Salmonberry shrubs are common along the creek. In some areas invasive species such as Scotch broom, Himalayan blackberry, English ivy, and Herb Robert are present. The native species of Sword fern and Stinging nettle are common. Modifications Early modifications of Boeing Creek include the logging of the creek's watershed, the creation of Hidden Lake, and the construction of the Seattle Country Club Golf Course Dam. The creek's mouth was crossed by railway tracks, today owned by BNSF, running along the edge of Puget Sound. In the 1960s a Sears mall complex was built at Aurora Avenue and 160th Street, covering Boeing Creek's wetland headwaters. This and other urban development placed about of what had been upper Boeing Creek into a patchwork of pipes, most of which are on private property. Within this area there is one segment that flows free from pipes, located in Darnell Park. However a lack of detention facilities and an undersized pipe causes flooding in the vicinity of Darnell Park and contributes to erosive flows downstream. The City of Shoreline is planning on improving the drainage and reducing downstream erosion by building a detention basin and replacing the pipe. The creek's watershed was heavily urbanized after World War II, altering the runoff and discharge patterns. Increased runoff into Boeing Creek during rainy weather has caused more intense erosion and sediment transport, leading to the build-up of sediment in Hidden Lake. In the 1970s heavy rains flushed enough sediment down the creek to completely fill Hidden Lake, which became a meadow. Subsequently, King County Surface Water Division began efforts to control stormwater runoff in Boeing Creek's watershed. In 1996 dredging work restored Hidden Lake. On January 1, 1997, a winter storm created a large sinkhole which ruptured sewer lines on 175th Street, resulting in the Hidden Lake being filled with sediment again. The lake was dredged and restored again. The city of Shoreline budgets money for dredging Hidden Lake as needed and continues to seek a long-term solution to the problems of increased storm surge runoff, erosion, and sedimentation. King County built a stormwater control system in Boeing Creek Park. A large detention basin stores water during storms, reducing the creek's