2007/04/18 Council Agenda Packet

dif April 6,2007 Page 5 b. Existing levees west and south of the existing treatment plant buildings, c. 4th Street SE roadway and adjacent ditches and drainage, d. 12th Street NE roadway and alignment of closure levee that would extend south from 12th Street NE to the existing levee that extends east of the north treatment pond to Union Slough, e. Along Union Slough, f. Along the north end of Smith Island west of I-5. 3. We will use existing FEMA data to determine levels of protection. 4. The City will provide LIDAR data,copies of existing topography, a copy of the District 5 map showing what they maintain,a copy of the planned upgrade for the WPCF, and a copy of all design and permit documents for the new levees. 5. The City will provide the GIS basemap,aerial photograph GIS layer overlay,and GIS layers for utilities that are in,near,or cross the existing levees and utilities that are in,near or cross 4th Street SE and 12th Street NE. We have also assumed that the City would provide us with reports,maps,and GIS layers(if available)of 10-year flood stage elevations. 6. The City will provide geotechnical reports and subsurface information for the WPFC and Ievees, utilities, roadways,and other improvements in the project area that are in the WPFC or City files. 7. For this project phase,we will not research Washington State Department of Transportation or other agency files for subsurface data. We propose that these data be collected and reviewed during the next project phase if levee modifications are proposed. 8. The City will provide a boat and driver capable of taking two additional personnel for the one-day on- water reconnaissance effort. 66