R10 SUPPLEMENT 7709.56b-91-1 EFFECTIVE 5/6/91 3.03-3.53 Page 1 of 4 3.1 - FOUNDATION INVESTIGATION. Refer to R10-TP-9, "Geotechnical Investigation and Analysis for Structures." 3.11 - Preliminary Investigation and Field Reconnaissance. Conduct this level of subsurface investigation, as a minimum, for any structure. Depending on the complexity and estimated cost of the proposed structure, further detailed investigation may be needed. 3.2 - GUIDELINES FOR TOPOGRAPHIC MAPS. 1. c. Measure the centerline and elevations of the existing structures to be removed to an accuracy consistent with the required work. Measure the location of existing structures, or portions of structures that are to remain, to 0.01 foot. 3. Use a scale of 1 inch = 10 feet or 1 inch = 20 feet, with the smaller scale preferred for structures less than 100-feet long. Use a contour interval of 2 feet, except where the site is very flat, and a 1-foot interval is necessary to show critical changes in elevation. Maintain a survey with accuracy consistent with the complexity of the project and the inferred accuracy of the contour interval. 11. Identify photo points and the approximate direction of photos taken. 12. Use the Sample Site Plan, SD 000 (exhibit 01), as a guide for topographic map content. 3.5 - ADDITIONAL DATA. 1. Bridge Data Sheet. Prepare the Bridge Data Sheet (exhibit 02) and submit with the Project Engineering Report. R10 SUPPLEMENT 7709.56b-91-1 EFFECTIVE 5/6/91 3.03-3.53 Page 2 of 4 3.2 - Exhibit 01 Sample Site Plan (SD 000) SEE END OF THIS CHAPTER IN THE PAPER COPY OF THE MASTER SET FOR SECTION 3.2 - EXHIBIT 01. R10 SUPPLEMENT 7709.56b-91-1 EFFECTIVE 5/6/91 3.03-3.53 Page 2 of 4 3.5 - Exhibit 02 Bridge Data Sheet SEE END OF THIS CHAPTER IN THE PAPER COPY OF THE MASTER SET FOR SECTION 3.5 - EXHIBIT 02. R10 SUPPLEMENT 7709.56b-91-1 EFFECTIVE 5/6/91 3.03-3.53 Page 2 of 4 3.5 - Exhibit 02--Continued Bridge Data Sheet SEE END OF THIS CHAPTER IN THE PAPER COPY OF THE MASTER SET FOR SECTION 3.5 - EXHIBIT 02.