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Indian River County GPS DENSIFICATION PROJECT 2007 July 30, 2007 Page 2 of 5 Reconnaissance The SURVEYOR will reconnoiter published control, along with existing county stations to be Blue Booked. The SURVEYOR will prepare field notes and take digital photography of network stations. Proposed GPS Network Submittal The SURVEYOR will design a GPS Network and prepare a proposed GPS Network submittal for review and approval by Ronnie Taylor and the NGS. Monumentation The SURVEYOR will establish new concrete bell-bottom monuments of sufficient stability to be Blue Booked in the GPS network or perform GPS measurements on existing Indian River County monuments. New monumentation shall be established as inter- visible "pairs" either as a new pair or adding to an existing monument. All network stations will be referenced with three (3) or more witness monuments, and a flexible survey witness post. A minimum of fifteen (15) monuments and a maximum of twenty-five (25) monuments are included in this contract. GPS Measurements The SURVEYOR will use static GPS measurement methods to create a closed geodetic network. This network will have sufficient redundancy to achieve the required project accuracy of First Order as stated in the FGCC publication Geometric Geodetic Accuracy Standards and Specifications for Using GPS Relative Positioning Techniques version 5. 0 dated May 11 , 1988, reprinted with corrections August 1 , 1989. GPS measurements will be performed using up to four (4) Trimble® Dual Frequency GPS receivers. GPS observations will be documented by either sketch , rubbing or photograph. Blue Book Submittal The SURVEYOR will perform computations and adjustments necessary for proper Quality Control / Quality Assurance as they relate to the required accuracies. The SURVEYOR will prepare Blue Book digital files, field documentation, and reports necessary for submittal to, and eventual publication by NGS according to the latest NGS Blue Book specifications: Input Formats and Specifications of the National Geodetic Survey Data Base VOL. 1, dated 1994 and 1998. The horizontal coordinates will be fumished to the COUNTY in U. S. Survey feet; Florida State Plane East Zone (0901 ) relative to the North American Datum of 1983 (NGS adjustment of 1990 or 1999) . The SURVEYOR will prepare a Blue Book project report relating the methods used during the survey and will submit survey for review and publication by NGS. Final Drawings and Deliverables CRCCCH