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Allan Ekberg, Mayor <br />Public barks Department - Henry Hash, Director <br />INFORMATIONAL MEMORANDUM <br />TO: Transportation and Infrastructure Committee <br />FROM: Henry Hash, Public Works Director ,. <br />BY: Hari Ponnekanti, City Engineer <br />CC: Mayor Allan Ekberg <br />DATE: April 12, 2019 <br />SUBJECT: Tukwila Infrastructure Design and Construction Standards <br />Project #11801302 <br />2019 Update <br />ISSUE <br />Update the Tukwila Infrastructure Design and Construction Standards. <br />BACKGROUND <br />The City of Tukwila Ordinance No. 1783 authorizes the Public Works Department to create and amend the Infrastructure <br />Design and Construction Standards. These standards are intended to ensure consistent design and construction <br />requirements and adherence to the City's Comprehensive Plans. <br />The Public Works standards set forth the minimum criteria and specifications for both public and private construction <br />projects. In addition, they provide the minimum design and construction requirements for utility and street improvements to <br />be accepted by the City of Tukwila. The Public Works Director may substitute more stringent design standards and <br />specifications where special conditions warrant or may relax standards upon approval of a variance. <br />The standards shall not substitute for engineering design, nor are they intended to limit innovative design where equal <br />performance in value, safety, and maintenance economy can be demonstrated. <br />DISCUSSION <br />The Public Works standards generally should be updated every two years however, they have not been updated since <br />2009. Since then several material types and manufacturers have changed. Under the guidance of the Public Works Director <br />and the City Engineer, City staff has formed a committee for each standard section led by a Program Manager and have <br />compiled all of the changes necessary. These changes were thoroughly reviewed by the committee and the City Engineer <br />for constructability and consistency. <br />RECOMMENDATION <br />Information only. An updated 2019 Infrastructure Design and Construction Standards will be published and available to <br />the public. <br />ATTACHMENTS <br />• Ordinance No. 1783 <br />• City of Tukwila Infrastructure Design and Construction Standards 2019 Update Synopsis <br />9 <br />W:\PW Eng\Development\PW Infrastructure Standards\2019 UpdatelInfoMemo TIC 041619 2019 Update.docx <br />