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LD26-1 3 Kenneth Comp Pond — Project Overview <br /> 1.1 Background Information <br /> The Comp Pond was designed by Macon County Soil and Water in 1992 and <br /> was constructed soon after.The metal pond outlet structure has since <br /> rusted out and is failing.Attached are the original plans for pond <br /> construction. Since failing, an attempt to fix the outlet structure was done.A <br /> previous contractor pushed dual-wall HDPE pipe through the existing barrel, <br /> and placed a concrete manhole as the new drop structure,and grouted the <br /> HDPE pipe at the invert of the manhole.This solution did not hold,and water <br /> is currently running down the side of the metal outlet structure and eroding <br /> the dam. <br /> 1.2 Scope of Work <br /> Contractor shalt remove and dispose of the existing metal drop structure, <br /> concrete manhole, HDPE piping, and all concrete, debris,and sediment <br /> present in the area of the outlet structure. Contractor shall excavate the area <br /> of the failing outlet structure down to clay material a minimum of 8'wide. <br /> Contractor shall cut new core trench through outlet pipe excavation and <br /> backfill in lifts to a minimum of 95%compaction. Install new outlet structure <br /> according the original Macon County Soil and Water specifications, however <br /> the new structure shall be 12 gauge aluminum, rather than steel. Re- <br /> construct pond dam to original lines and grades with clay material to a <br /> minimum 95%compaction. Remove trees/shrubs on the dam face and <br /> compact clay material in root zones. Spread topsoil on disturbed areas and <br /> seed. <br /> 1.3 Pre-Bid Meeting/Site Visit <br /> Each Contractor will be required to attend a pre-bid meeting or schedule a <br /> site visit to view the existing failing structure and get acquainted with the <br /> project. Coordinate with the owner or City staff to obtain access to the site. <br />