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ShOCENTURY <br />WEST <br />E N G 1 N E E R! N G <br />Conduct topographic surveying for an area 500 feet wide centered on the Runway <br />7-25 centerline by 300 feet beyond the new Runway 25 end of pavement: <br />o Collect topographic survey points on a 50'x50' max grid spacing. <br />Elevations on pavement areas shall be accurate to 0.01 feet and elevations in <br />unpaved areas shall be accurate to 0.05 feet. <br />Incorporate the data collected from the survey into the digital terrain model that <br />was developed as part of the Airfield Environmental Assessment project. A contour <br />map at a scale of 1"=50' will be developed for use in the design and shall be provided <br />to the engineer in PDF and AutoCAD or XML format. The contour interval shall be <br />0.5 feet. <br />2. Clear Approach Field Verification <br />Perform field survey to check and verify the approach surfaces of Runway 7 and <br />Runway 25. Field survey for this task will include: <br />• Three shots/views for each runway end. For each runway end/threshold, set up <br />instrument on runway centerline and each edge of approach surface. (Locations will <br />be offset from runway end/threshold as necessary to allow for instrument height.) <br />• Set instrument to view approach surface slope (5.0% for Runway 07 and 5.0% for <br />Runway 25); observe if any obstructions appear within approach slope angle. Take <br />photos through instrument view finder to show results. <br />• If any trees, towers, fences, roadways, and other structures or terrain features <br />appear to be obstructions to the approach surfaces based on these field checks, <br />provide information regarding obstruction type (tree vs. structure, etc.) and general <br />location (east/west of runway centerline, etc) so that additional follow up can be <br />included with final design scope if necessary. <br />Primary Task 2 Deliverables: <br />• Survey base map (CAD and PDF) <br />TASK 3 — GEOTECHNICAL INVESTIGATION (HWA Geosciences) <br />Geotechnical Analysis on Runway 7-25 will be undertaken to verify existing conditions of <br />the pavement section, subgrade, and aggregate base materials of Runway 7-25 to inform <br />the pavement rehabilitation design. <br />5of11 <br />