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. . 1 <br /> changed . It is our understanding that we do not intend on doing a tidal study. We will <br /> contact DEP to request an elevation and will explain to them it is for topographic <br /> purposes only and is not for a boundary determination on lands that are already state and <br /> federally owned. We will also include the location of any berms or changes in grade <br /> along the river from Jungle Trail to the Hammock area. CAI will compute and delineate <br /> a contour line for the MHW line as well as show the location of the main outline of the <br /> vegetation along the rivers edge. <br /> 4 . Set three (3 ) onsite benchmarks and control points with state plane coordinates NAD <br /> 83 /99 , <br /> 5 . Cross sections of the drainage ditch running southwesterly along the westerly edge of <br /> the Hammock area (triangle parcel) . Random cross sections to be observed to achieve <br /> relative grade and position to the westerly terminus, if obtainable . <br /> 6 . Spot elevations of the area to the northwesterly of the Hammock Area to tie in the <br /> existing water body and possible drainage structure. <br /> 7 . Locate and delineate any wells or outfalls/culverts and/or drainage structures of <br /> concern. <br /> 8 . Establishing two staff gages on the National Geodetic Vertical Datum of 1929 <br /> (NGVD29). Locations to be determined by Michael O 'Brien. <br /> Topography to be performed with GPS RTK (accuracy 2 -4 cm + 2ppm) and conventional <br /> methodology (Total Station) where RTK is not suitable . Control point elevations will be <br /> established using differential leveling techniques . Horizontal Datum will be North <br /> American Datum of 1983 , Adjustment of 1999 (NAD 83/99) and Vertical Datum will be <br /> National Geodetic Vertical Datum of 1929 (NGVD 1929) . <br /> Total Estimated Cost $ 115420. 00 <br /> Our estimated time frame to complete this project is 60 calendar days from the notice to <br /> proceed. <br /> Trusting you find this information to be in order and looking forward to hearing from you <br /> in the very near future, I remain, <br /> Yours Truly, <br /> Carter Associates, Inc. <br /> Po � <br /> David E . Luethje, P . S .M. <br /> S :\P\04490s\docs\04-490P_PINWR-060804. doc Page 2 of 2 Serving Florida <br /> Since 1911 <br />