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C , Provide information on all recovered monumentation . d . Tie each Project' s main Control/Baseline to all Section lines intersecting and/or in the vicinity of the mentioned control . A Certified Corner Report shall be prepared , submitted to D . E . P . and a copy supplied to County Surveyor (as per Florida Statutes 177 part III . ) 4 , Vertical Survey Control — ( NGVD29 Datum ) With a +/- local conversion factor to NAVD88 . (This is just a note of conversion on the Cover Sheet. All elevations on the Construction Drawings shall be NGVD29 . ) Establish Temporary Bench Marks (TBMs ) at maximum 250400t intervals along the Survey Baseline and the property' s perimeter. These TBMs shall consist of long lasting - durable materials and/or be fixed on a substantial feature . The Contractor will use these TBMs during construction . Show TBMs on the Boundary Survey and Survey Control Map with a reference to the " Published Origin/Bench Mark" of the Projects' Vertical Control . 5 . Survey Control — Permanently mark all control points ( horizontal and vertical ) . Provide one set of signed and sealed copies of all field books and reduction of data to the COUNTY upon completion of the Work. Locate all control points to minimize the potential for disturbance and provide references for main control points (e . g . P . C . , P . I . , P . T . bend points ) to allow for their re-establishment in the event of loss during construction . Show control points and references on the Boundary Survey and Survey Control Map . 6 . Existing Spot Elevations and Existinq Contours — Show existing spot elevations at minimum 100-foot intervals , and as necessary to accurately illustrate grade changes and unusual topographic features . Show existing spot elevations and existing 1 ,, foot contour lines at top of bank and beyond , for each site . Rotate all spot elevations 45 degrees . Show the topographic information on the Topography Drawings . Also , provide the COUNTY with a spreadsheet or text file with coordinates and spot elevations . 7 . Canal Cross Sections - All canal Cross Sections shall depict the actual physical condition of the canal . Show top of banks , slopes , water elevation , submerged grade breaks , drop-offs , silt/muck depth and/or any features that may affect design analysis . 8 . Limits of Canal Cross Section Surveys — In general , the limits of canal cross section surveys shall be as listed below . The ENGINEER shall use its discretion regarding the number of cross-sections to take , understanding that the cross-sections will be used to reshape the canal banks upstream and downstream of each treatment system . FAPublic Works\KeithM\Stormwater Projects\East IRC\Contracts\Consultant Contract with Carter & Associates\Work Order No. 5 - Final Design of Vortex System\Work Order #5 - Rev. May 3 , 2004.doc 4