Despite the river modifications and stormwater pollution, the creek supports a variety of riparian habitats, native animals and fishes.

[4] Boeing Creek continues through a culvert under Innis Arden Way and flows west through a ravine and under BNSF's railroad tracks before emptying into Puget Sound.

Another tributary fork rises in the neighborhoods of Shoreview Hills and The Highlands and flows north to join Boeing Creek below the site of the former Hidden Lake.

He used the land primarily as a hunting retreat and had a small dam made, creating Hidden Lake which he used as a private fishing pond.

The land that today is Boeing Creek Park was partially logged, leaving a number of large mature conifers, some over 200 feet (61 m) tall.

There are a large number of "social trails" as well, which often climb steep, unstable slopes, increasing erosion and overall stream degradation.

[3] A study done in 1994 found juvenile coho salmon in the lower portion of Boeing Creek, below the Seattle Golf Course Dam.

[3] Two other structures influence stream ecology: An artificial waterfall, about ten feet high, constructed from concrete, just downstream from Innis Arden Way; and the "Seattle Country Club Golf Course Dam", a metal dam and pump station about 200 meters downstream of Innis Arden Way, which forms of reservoir that supplies the Seattle Country Club golf course with irrigation water.

None of the dams provide fish passage and therefore present a total barrier, limiting stream use by anadromous species to the lower third of the creek.

There are a number of mature conifers that escaped being logged, including 200-foot (61 m) tall Douglas-fir and Western White Pine trees.

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.

[3] This and other urban development placed about 2 miles (3.2 km) of what had been upper Boeing Creek into a patchwork of pipes, most of which are on private property.

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.

Subsequently, King County Surface Water Division began efforts to control stormwater runoff in Boeing Creek's watershed.

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 detention basin is augmented by an underground storage pipe designed to temporarily store up to 500,000 gallons of wastewater during large storms.

Completed in 2007 by King County Public Works, the pipe's purpose is to help keep wastewater within the sewer system and reduce overflows into Puget Sound.

[23] The City of Shoreline is planning additional stormwater management projects to reduce flooding and improve Boeing Creek's hydrology.

The removal also improves fish habitats and water quality downstream of the former site of the lake by allowing natural sediment movement.

As part of the same project, the City is improving the walking trails around the former site of the lake and replacing the culvert under Innis Arden Way.