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2020-411-E Planning-Alpha and Omega Group Lake Orange erosion control_
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2020-411-E Planning-Alpha and Omega Group Lake Orange erosion control_
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<br /> <br /> <br /> <br /> <br /> <br />July 2, 2020 <br /> <br /> <br />Mr. Christopher J. Sandt, P.E. <br />Staff Engineer <br />Orange County Planning and Inspections Department <br />P.O. Box 8181 <br />131 W. Margaret Lane <br />Hillsborough, NC 27278 <br /> <br />Re: Proposal for Professional Engineering Services <br />RFQ 5285 Lake Orange Erosion Control Barrier Replacement <br />(A&O Proposal No.: P20_037) <br /> <br />Dear Mr. Sandt: <br /> <br />Alpha & Omega Group is very pleased to offer professional engineering services for this project. <br />The details of our proposal are outlined in the following sections. <br /> <br />Project Understanding <br />Our proposal is based on the information contained in RFQ 5285 and two site visits with you in <br />April of 2020. Lake Orange has developed wave action erosion along the length of the earthen <br />dam on the impoundment side, underneath the original concrete slope protection along the <br />earthen dam at the waterline and adjacent to the cutoff walls at the spillway. Orange County <br />desires to repair the eroded areas and restore the 3(H):1(V) slope of the earthen dam to its <br />original configuration within the eroded areas and protect the slope from future erosion. <br />Additionally, Orange County desires to establish a permanent elevation monument for the dam. <br />Scope of Services <br />The items included in our scope of service are as follows: <br /> <br />Design <br />1. Provide a topographic survey of the impoundment side of the earthen dam along the <br />dam (approx. 1000 ft. in length) from the top of the dam down to approximately 30 feet <br />into the lake. Spot elevations of the existing flashboards, top of spillway crest, the toe of <br />the spillway crest below the flashboards and the submerged concrete approach slab and <br />walls that extend up the embankment will also be obtained. Also provide survey of the <br />eroded slopes adjacent to the submerged approach slab and embankment walls. <br />Attachment A - <br />Provider Proposal <br />DocuSign Envelope ID: F08C6043-A165-4B95-9C6F-D2E8524A0B94
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