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`PORTLAND REGIONAL OFFICE Oy,
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`DATE: June 20,2001 TIME: 10:00 /AM g
`WRITTEN BY: David Lord OF D2SI-PRO e
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`PROJECT NAME/MNO. Yelm, P-10703
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`SUBJECT DISCUSSED: Part 12 Report for Canal
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`g F Discussi
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`A meeting was held in the D2SI-PRO offices on June 20, 2001. Attending for the
`licensee (City of Centralia) were Richard Southworth, Utility Director; Jan Stemkowski, City
`Engineer; Inara Scott, Attorney for Ater Wynne of Portland, Oregon; and the licensee’s Part
`12 Consultant, Gordon Denby, Principal, GeoEngineers of Redmond, Washington. Attending
`for the D2SI-PRO were Harry Hall, Regional Director; Pat Regan, Deputy Regional Director;
`and David Lord, Civil Engineer. The meeting was to discuss a schedule for completing the
`Part 12 Report which was due on May 29, 2001. Centralia’s time extension request was dated
`that day.
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`Since that letter, the City had solicited a scope of work for the report which was faxed
`to the D2SI-PRO on June 18, 2001. During the meeting, D2SI-PRO staff indicated that the
`consultant should start with conservative assumptions before proceeding to install borings in
`the canal dike and conduct soil tests, and we encouraged a phased approach to the report. Mr.
`Denby reported that if conservative assumptions were assumed the dike would be unlikely to
`meet the required FS = 1.5. After a lengthy discussion, Mr. Denby proposed a Phase I
`approach of inspecting the entire canal to identify which areas have a dike and which are cut
`from native soils, to evaluate any problems with the dike including seepage and stability
`problems, and to begin the determination of which are the high hazard areas, i.e., which have
`any homes at risk. This information would be used with dambreak studies to identify which
`homes are at risk of more than 2 feet of inundation, and thus which dike sections are high
`hazard. The initial effort has to be to clear the 9.1 mile dike of vegetation so the inspectors
`can sce any potential problems.
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`We agreed to meet aga.it}&ahnut the end of August to discuss the results of this effort
`which would include a preliminary map of the canal shoeing dike areas, inundation areas, and
`identification of problems, e.g., seepage points. At that time the D2SI-PRO would help
`determine which dike sections besides the identified high hazard sections should be considered
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`FURTHER ACTION REQUIRED:
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`ce: OHL ,D281X,DEER ,DHAC ,RIMSX ,FilesX , Additional Pages 1 .
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