Planning 2017-06-22 Item 4 - Foster High School Expansion and Birth to Kindergarten - Attachment K: Tukwila School Campus Parking Analysis

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Tukwila School Campus Parking Analysis 1. DEVELOPMENT IDENTIFICATION Gibson Traffic Consultants, Inc. (GTC) has been retained to provide a parking analysis for the Tukwila School Campus, including Foster High School, Showalter Middle School and the proposed Birth to K school. Brad Lincoln, responsible for this report, is a licensed professional engineer (Civil) in the State of Washington and member of the Washington State section of ITE. The Tukwila School Campus is located along the north side of S 144 "' Street, east of 42 "d Avenue S. Foster High School has access to S 144 "' Street and 42 "d Avenue S and includes the technology building. Showalter Middle School is located east of Foster High School and has access to S 144 "' Street. The proposed Birth to K school is located north of Showalter Middle School and is proposed to have access to S 142 "d Street. Improvements are proposed for Foster High School and Showalter Middle School, but the improvements are not proposed to increase the student population of either school. Foster High School currently has 878 students and Showalter Middle School has 632 students. The Tukwila Birth to K school is proposed to have up to 440 students. 2. METHODOLOGY The analysis of the typical parking for a normal day has been performed based on actual parking observations at the existing Foster High School and Showalter Middle School performed by the independent count firm National Data & Surveying Services (NDS) in September 2016. Observations were performed after school began and before school dismissed to determine the typical school parking demand. Foster High School and the technology building currently have three lots for teachers, students and visitor parking. These lots include the north lot, the south lot and the east lot. Foster High School also has a bus area, but that has not been included in this analysis since teacher, student and visitor vehicles are not allowed in this lot during school times. Showalter Middle School has two loops. There is also the City of Tukwila Pool between Foster High School and Showalter Middle School. This area has 17 designated parking spaces, although it appears Foster High School parking does occur in this area. The demand for the pool parking spaces has therefore been included as part of the analysis, but the parking supply in the pool area has not been included. It is important to note that accessible spaces have been included in the supply and demand calculations. The event parking demand is based on the attendance for events in the Performing Arts Center and a football game using the typical vehicle - occupancy rate of 2.1 for recreational events. This methodology is similar to analysis approved for other high schools in the Puget Sound region. Gibson Traffic Consultants, Inc. February 2017 info @gibsontraffic.com 1 GTC #16 -178 211