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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None of the buildings on the site were identified on the State of Washington Historic Property Inventory list or are eligible for listing in a preservation register due to the extent of modifications. Transportation 31. King County Metro Transit Route 128 provides bus service directly to the project site. 32. Parking at Foster High School is proposed to be reduced from 251 spaces to 174 spaces. Parking at Showalter Middle School will remain unchanged at 122 spaces. 80 spaces are proposed at the new Birth -to- Kindergarten Center. There are an additional 28 spaces on the school campus that may be available for special events. The applicant has applied for a parking variance as part of the Conditional Use Permit. 33. South 142nd Street from 43rd to 44th Streets will be extended to access the Birth -to- Kindergarten Center and will include two paved travel lanes and a sidewalk. A portion of the roadway from 44th Street to the Birth -to- Kindergarten Center will be located within a private easement. At the new Birth - to- Kindergarten Center, one of three emergency vehicle accesses and a delivery vehicle access road will be provided via a gated connection with Showalter Middle School. 34. The number of vehicular trips associated with Foster High School and Showalter Middle School will not change with the proposed project, including driveway locations. 35. Based on a Traffic Impact Analysis for the Birth -to- Kindergarten Center, The combination of new full - day kindergarten and birth to pre- kindergarten children are expected to generate as many as 1,000 to 1,154 average daily trips (depending on assumptions used), with 247 AM peak trips and 197 school PM peak -hour trips. Approximately 75 percent of the students are expected to be bused. Public Services 36. Public safety will be enhanced at Foster High School with the enclosure of the campus by new buildings, added fencing and controlled entrances. New security cameras and two personnel are being provided. A First Responder Antenna System will be implemented. Utilities 37. Utility providers are: a. Water: King County Water District #125 b. Sewer: Valley View Sewer c. Electricity: Seattle City Light d. Natural Gas: Puget Sound Energy e. Cable, Internet, and Telephone Service: Comcast CONCLUSION OF THE RESPONSIBLE OFFICIAL Tukwila School District has determined that the proposal, with the mitigation measures listed below, does not have a probable significant adverse impact on the environment, and an Environmental Impact Statement is not required under RCW 43.21c.030(2). The mitigation measures described below are recommended as conditions of project approval. This decision was made after review of a completed environmental checklist, other information on file with the Tukwila School District, and existing regulations. The responsible official finds this information reasonably sufficient to evaluate the environmental impacts of this proposal. MITIGATION MEASURES Earth 1. A Department of Ecology General Permit to Discharge Stormwater associated with construction activity will be obtained. 107