Hibulb Cultural Museum | Tulalip, WA

Peter provided civil engineering services for the Hibulb Cultural Center and Natural History Preserve.  The project team looked at ways to mimic nature to meet the stormwater requirements for this multi phased project.  Taking advantage of the 3 acre site’s sandy soils, Low Impact (LID) Design techniques were used to treat and retain the project site’s stormwater.  The design included a series of bioretention swale facilities/rain gardens and pervious pavers. 

The bioretention facilities are located around the building, within the parking lot and perimeter of the site and provide storage for stormwater prior to being treated and infiltrated to replenish the groundwater.  The bioretention facilities includes a layer of bioengineered soil mix which treats the stormwater and planted with native plantings to help contribute to the stormwater treatment processes and help beautify the site. 

Part of the design approach was to save native trees within and surrounding the developed site to help anchor the landscaping and provide a more mature backdrop for the Cultural Center.  The plantings and trees provide the natural evapotranspiration processes to help limit runoff and contribute to the natural water cycle.  Pervious pavers were also used to treat and retain runoff on-site and to help soften the hardscape.

In addition to the site stormwater design: Roadway frontage improvements were constructed and water and sanitary sewer extensions were provided to serve the site.

Client: Tulalip Tribe
Owner/Developer: Tulalip Tribe