Planning 2017-06-22 Item 4 - Foster High School Expansion and Birth to Kindergarten - Attachment D: SEPA Mitigated Determination of Nonsignificance by Tukwila School District (5/9/2017)

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SCHOOL C71 s T R I c T 1 4040 S. "144th St. Tukwila, WA 98168 ( (206) 901 -8000 1 tukwi Ia. wednet.edu SEPA MITIGATED DETERMINATION OF NONSIGNIFICANCE Foster High School Modernization and Additions (FHS), Showalter Middle School Modernization and Additions (SMS), New Birth -to- Kindergarten Center (132K) DESCRIPTION OF PROPOSAL: The project entails three primary projects: Foster High School Modernization and Additions; Showalter Middle School Modernization and Additions; and construction of the new Birth -to- Kindergarten Center. All projects will have separate and independent access and circulation. Foster High School Modernization and Additions - The District will renovate, modernize and expand the existing school to accommodate smaller class sizes and a STEAM focus. The building will add up to 15 teaching stations /classrooms; expand and enclose the student commons; add an auxiliary gymnasium and expand the weight room; reconfigure the ball fields to accommodate baseball, softball and tennis courts; reconfigure and reduce parking; and make other modernization and safety improvements. The project entails demolition of the existing District technology building located onsite and removal of four double classroom portables. The total expansion area is 61,164 square feet for a new total building size of 174,264 square feet. Capacity will increase from 878 to 1,100 students; however actual enrollment is not anticipated to increase over the next 10 to 15 years. No changes are proposed to the existing access from S. 144th Street. Showalter Middle School Modernization and Additions -The District plans to modernize the facility to include interior improvements, add additional classrooms in a second story addition to the main classroom building, and expand the commons and gymnasium. The project entails the removal of two 1,800 square foot portables for a net building increase of 12,000 square feet and a total building size of 100,000 square feet. Improvements for emergency access include the addition of a gated emergency access connection to the north via S 142nd Street. The existing access /driveways from S. 144th Street and parking remain unchanged. The expansion is to accommodate classroom size reduction, however capacity will not increase. New Birth -to- Kindergarten Center - The District is adding a new 53,000 square foot, two -story Birth to Kindergarten Center located to the northeast of the Foster High School Stadium on what is presently District ballfields. The first phase of the project will be to house all kindergarten and pre - school from around the district. Subsequent phases will add infant and toddler programs. The total facility capacity will be 440 students and 28 classrooms, of which 290 students and 17 classrooms will be full day kindergarten; 90 preschoolers plus infant and toddler programs of 30 -40 children (in split half -day and full - day programs). Each age group will have separate areas within the building and outdoor play areas. Access to the property will be via S. 142nd Street where two travel lanes and sidewalks will be provided. Approximately 80 parking spaces will be added. An emergency vehicle and delivery vehicle access road will be provided via a gated connection with Showalter Middle School. LOCATION OF PROPOSAL: Foster High School: 4242 South 144th Street, Tukwila, WA 98168, Parcel No. 1523049108. Showalter Middle School: 4628 South 144th Street, Tukwila, WA 98168. Parcel No. 1523049108. Birth -to- Kindergarten Center: Vacant Property (undetermined situs), South 144th Street. Parcel No. 1523049164. All project sites are located in Section 15, Township 23, Range 4. ATTACHMENT D 103