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bowmanconsulting.com The purpose of this project was to carry out Indian River County’s plan add to and strengthen its existing published vertical control for FEMA National Flood Insurance Program Community Rating System (CRS) credits. To accomplish this task, Bowman Consulting (for- merly Creech Engineers, Inc.) performed professional surveying and mapping services to level and Blue Book a maximum of twenty-six (26) monuments. All Twenty-six (26) of the monuments were of aluminum alloy rod construction. The monuments were required to meet NGS Class “B” stability. The resulting vertical control network was Blue Booked and submitted to the National Geodetic Survey (NGS) for inclusion into the National Spatial Reference System (NSRS). Bowman Consulting prepared a map that will show the proposed level routes for all proposed benchmarks, and through coordination with Sunshine One Call, underground locates were performed for each location assuring clearance of underground utilities of conflicts prior to any excavations. Bowman Consulting then recovered published control and determined suitable locations for newly established benchmarks to be Blue Booked. Bowman established 26 new monuments of sufficient stability to be Blue Booked in the vertical network. All new benchmarks were referenced with three (3) or more witness monuments, and a flexible survey witness post. Our team used digital leveling methods to create a closed level network. This network had sufficient redundancy to achieve the required project accuracy of a minimum of Second order, Class 2 as stated in the FGCS publication Specifications and Procedures to Incorporate Electronic Digital/ Bar-Code Leveling System version 4.1 5/27/2004. Vertical measurements were performed using a Trimble Dini 22 Digital Level and two (2) Invar type rods. Bowman Consulting performed computations and adjustments necessary for proper Quality Control / Quality Assurance as they related to the required accuracies. Blue Book digital files, field documentation, and reports were prepared for submittal to, and eventual publi- cation by NGS according to the latest NGS Blue Book specifications: Input Formats and Specifications of the National Geodetic Survey Data Base VOL. I, dated 1994 and 1998. Final deliverables included a signed and sealed survey report relating the methods used during the survey, accuracy achieved, and a list of final coordinates in accordance with the “Minimum Technical Standards” for surveying and mapping in the State of Florida, as well as raw data reports of observations and adjustments, copies of field notes, and a final work product for use by the County. Vertical Control Network Indian River County, Florida Client Indian River County 1801 27th Street Vero Beach, Florida 32960 Thomas J. Croonquist, PSM p: (772) 226-1344 e: tcroonquist@ircgov.com Contract Dates 8/2011 – 12/2011 Fee $125,000 Tab 1 Minimum Requirements Page 14