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Laconia Street Route / Design Survey Project Specific No. 0523 Proposal for Professional Surveying Services Revision 2 23101 .02 (00) March 6, 2006 Page 2 of 4 Task 2 — Primary Control • Primary Horizontal Control — CEI will establish a horizontal control network using Static GPS methods. The network will meet the FDOT4 requirements for Primary Horizontal Control based on the FDOT4 Memorandum titled FDOT DISTRICT IV GLOBAL POSITIONING SYSTEM SURVEY STANDARDS FOR HORIZONTAL NETWORKS, dated April 11 , 2003. CEI Crews will reconnoiter published horizontal control surrounding the project corridor. CEI will recover existing FDOT4 horizontal control from the C. R. 510 project. • Primary Vertical Control - CEI will establish a Vertical Control Network using 3-wire differential leveling technique relative to the NGVD29 elevations for the benchmarks provided by the COUNTY. The network will also be adjusted relative to the NAVD88 based on published NGS and FDOT4 values for local control. The network will meet the FDOT4 requirements for Primary Vertical Control based on the current FDOT Location Survev Manual. Task 3 — Survey Baseline • CEI will establish a survey baseline the length of the corridor for the project relative to the west line of Section 25, Township 31 South Range 38 East. Task 4 — Locations • All structures and improvements will be located within 200' east of the east canal bank of the Lateral "C" Canal running along the west section line from the southern project limits north to the Saint Sebastian River ( South Prong ). • All structures and improvements will be located within the RNV of Laconia Street, within 80 feet west of the west RNV, and within 25 feet east of the east RNV of Laconia Street from the north side of the Saint Sebastian River (South Prong) north to the project limits and east +/- 150 feet along Concha Avenue within limits of RNV. Specifically this will include the finished floor elevations of houses along the corridor and improvements within Lot 1 Block 364 of Sebastian Highlands Unit 11 • CEI will locate only the limits of the orange groves within these limits. Ground measurements will be made within the grove rows sufficient only to provide a typical row profile. Task 5 — Cross Sections ■ Cross sections every 100' will be located within 200' east of the east canal bank of the Lateral "C" Canal running along the west section line from the southern project limits north to the Saint Sebastian River ( South Prong). Also cross sections every 100' will be located within the RNV of Laconia Street, within 80 feet west of the west R/W, and within 25 feet east of the east RNV of Laconia Street from the north side of