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July 10, 2001 <br /> Ms. Therese Walch <br /> Department of Public Works <br /> <br /> ' City of Eugene <br /> 858 Pearl Street <br /> Eugene, OR 97401 <br /> Subject: Contract Addendum #1 for the Lower Amazon LOMR Study <br /> Dear Therese, <br /> This letter serves the purpose of providing a contract addendum for completing the Federal <br /> Emergency Management Agency (FEMA) Letter of Map Revision (CONK) for the Lower <br /> Amazon Creek. This letter documents and summarizes the remaining work required to <br /> complete each task and their associated budget implications. The work that has been <br /> completed by URS and the current budget status for each task are also provided in this letter. <br /> The emphasis in this addendum is on the remaining tasks and the approach to complete the <br /> tasks. For more background information on the need for this contract addendum, please refer <br /> to the URS' letter to the City dated November 17, 2000. The following provides a brief <br /> overview on the background and status of the project and progress that has been made since <br /> November 2000. <br /> Summary of Proiect Background <br /> The project was initiated in February 2000. The first draft of a contract addendum was <br /> prepared on November 17. This addendum summarized the major unanticipated changes to <br /> the project and their associated budget implications. The total additional budget estimates <br /> varied from $54,000 to $64,000 depending on three different scenarios as described in the <br /> addendum. The different scenarios were based on the uncertainties involved in the levee <br /> certification for the 1135 project and Diversion Channel. Because of these uncertainties, the <br /> contract addendum was put on hold at that time. <br /> Earlier this year, the Cotes informed the City in an email that they appeazed to be able to <br /> certify the 1135 project levee but not the Diversion Channel levee downstream of Royal <br /> Avenue. As a result, in March 2001, the City requested that we perform a preliminary <br /> hydraulic analysis far the Diversion Channel levee using updated topographic information <br /> provided by the City and the Corps. We anticipated that the preliminary hydraulic modeling <br /> results could clarify some of the questions that remained regarding the hydraulic analyses. At <br /> s:lproj94\945042°dlamazonFEMA\contractaddendum.doc <br /> URS Corporation 07/13/01 <br /> 111 SW Columbia, Suite 900 1 <br /> Portland, OR 97201-5814 <br /> Tel: 503.222.7200 <br /> Fax: 503.222.4292 <br /> <br />