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4. Base the survey on State Plane Coordinate System using NAD 83/88. The Engineer will <br />base coordinate geometry and vertical elevations on and tied into the Texas Department of <br />Transportation ( "TxDOT ") and the City's coordinate system as agreed to by the Engineer <br />and the City. In addition, the Engineer will provide the location of Primary Control <br />including permanent project benchmarks and traverse points (description, coordinates <br />and elevations) and the grid to surface adjustment factor. <br />5. Provide topographic mapping and profile the Project area including the intersections of <br />cross streets and driveways. In addition, the Engineer will provide topographic map plot <br />at a scale of 1 " =50', depicting surface features, legible text (using leaders if necessary) and <br />1 -foot contour lines indexed at 5 -foot intervals. The Engineer will show existing ROW <br />on Pat Garrison Street, Fredericksburg Street and Comanche Street. The Engineer will <br />provide a separate MicroStation file that contains 3D breaklines, existing ground <br />triangulation network and contours with elevations. Finally, the Engineer will provide <br />digital ASCII file (on CD -ROM) and hard paper copy of all survey points including point <br />numbers, N &E coordinates, elevation, and description format. <br />6. Locate all mailbox (single, double, etc.), signs including size, types, location and verbiage. <br />The Engine will also measure guardrail and permanent erosion control measures. In <br />addition, the Engineer will collect the required miscellaneous information including; <br />measurements of riprap, retaining walls, drainage culverts and structures and note types, <br />sizes, and shapes, measure pier size and skew angle. <br />7. Obtain cross - section elevations across the roadway including the roadway surface from <br />ROW to ROW at 50 foot intervals within the Project limits. <br />8. Establish and stake baseline control and furnish listing of horizontal alignment and <br />coordinates for baseline control. <br />9. Establish benchmarks at 1,000 foot maximum intervals for vertical control in locations <br />that will not be disturbed by construction, and tie to established benchmarks. <br />10. Preparation a 3d digital terrain model (DTM) for the Project limits. <br />11. Establish x, y, and z coordinates of power poles, manholes and valves of various <br />utilities, and flowlines of existing sanitary sewer and storm sewer lines. The Engineer <br />will vertically locate utility lines that are readily accessible at manholes, valve covers, <br />etc. In addition, the Engineer will place the location of existing utilities on the <br />survey and provide a list of utilities as marked by utility owners and the one call system. <br />Furthermore, the Engineer will locate marked existing underground utilities <br />horizontally. <br />12. Obtain stationing on side road and driveway pipes and offset distances from centerline. <br />Also, the Engineer will note the type of surface, width of roadway or driveway, and <br />CITY HALL • 630 EAST HOPKINS • SAN MARCOS, TEXAS 78666.512.393.8150 • FACSIMILE 512.393.3983 <br />SANMARCOSTX.GOV <br />21 <br />