TagThomas/Lane(1)

The assessment and evaluation of the proposed project's impacts were based on "neighborhoods" as defined by the cities of Burien, Des Moines, Federal Way, Normandy Park, and Tukwila. For the Highline School District, each area served by each elementary, middle and high school were assessed. Each neighborhood matrix presents environmental, transportation, and socio-economic impacts. Each matrix is divided into the following columns: • Measure • Impact • Mitigation • Cost The type of impact being assessed. For example, aircraft noise (DNL and SEL). cultural resources, local streets, and public safety are just a few of the measures being considered. The quantifiable effect experienced in each neighborhood. For example, if one-third or more of a neighborhood is within a particular noise contour, the whole neighborhood is considered to be impacted by that contour. The action necessary to address the specific impact. For example, buying out and redeveloping a neighborhood is one form of mitigation. The estimated cost of implementing each specific mitigation action. NEIGHBORHOOD Et~~ v IRONMENTAL IMPACTS MEASURE ! IMPACT MITIGATION NOISE AND VIBRATION DNL SEL , · ,. ·, 1) 1/3 or more of a neighborhood is in the 65 DNL 11) Buyout and redevelop contour (and higher) 2) 113 or more of a neighborhood is in the 60 to 65 I 2) Easement and insulation DNL contour Neighborhoods within the 400' topographic line that are also within 5 miles of the airport. Easement and insulation 1) $760,000/acre 2) $37,500/acre $37,500/acre ; !::;;!::,~{~'~ ~.;:::'ber of minutes per average annual…