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Orange County <br />Lake Orange Auxiliary Spillway Additional Services <br /> <br /> <br />Project 20P2101 9.02 / September 21, 2022 Page 3 Schnabel Engineering South, P.C. <br />SCOPE OF SERVICES <br />General <br />Our original scope of services was organized into five tasks that are described in our original agreement <br />dated August 20, 2020: <br /> <br />1. Field Investigations <br />2. 2A-Eval. Of Gate Repl. Alt. (memo) <br />3. 2B-Draft Dwgs, Specs, Design Rpt. <br />4. 2C-Final Dwgs, Specs, Design Rpt. <br />5. 2D-NCDEQ Approval/Permit <br /> <br />Task 1 (Field Investigations) and Task 6 (Additional Services) of our existing agreement have been <br />completed. A sixth task (Additional Services) was previously added for the additional intake tower <br />inspection and GPR survey. We propose removing Task 2 (2A-Eval. Of Gate Repl. Alt. (memo)); revising <br />the scope of Task 3 (2B-Draft Dwgs, Specs, Design Rpt.) and Task 4 (2C-Final Dwgs, Specs, Design <br />Rpt.); and adding Task 7 (Additional Auxiliary Spillway Investigations) as described below to better align <br />with current project conditions. The scope of work for Task 5 (2D-NCDEQ Approval/Permit) will be <br />unchanged. <br /> <br />The scope of services described below will be performed under the responsible charge of a Professional <br />Engineer licensed in the state of North Carolina. <br />Revisions to Task 3 (2B-Draft Dwgs, Specs, Design Rpt.) and Task 4 (2C-Final Dwgs, Specs, <br />Design Rpt.) <br />Our original scope for Tasks 3 and 4 included evaluation and development of typical concrete repairs for <br />the intake tower and design of replacement gates and/or gate valves, operators, and appurtenances <br />along with typical concrete repair details for the auxiliary spillway. We propose revising the scope of <br />Tasks 3 and 4 to remove the intake tower repair and gate replacement tasks from the scope of work and <br />focus on auxiliary spillway repairs. The revised scope of work includes the following: <br /> <br />• Develop repair details designed to fill the voids within or beneath the auxiliary spillway slab and <br />within or behind the auxiliary spillway sidewalls. We expect the repairs will consist of removal of <br />concrete in areas with voids then placement of filter material and patching areas with new <br />concrete repair materials. <br />• Prepare typical concrete repair details for the concrete auxiliary spillway. The type of concrete <br />repair details to be included are spalls, delamination, cracks, and joint repair. <br /> <br />In accordance with our previous scope of work, we will submit a draft of the repair drawings, technical <br />specifications, and design report to Orange County for their review. We will then complete the design, <br />including addressing comments received from Orange County and submit the final submittal of repair <br />drawings, technical specification, and design report to Orange County and NCDEQ Dam Safety. <br />DocuSign Envelope ID: 94DC2E6B-A091-44C2-A636-AEC6DE85AB37