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i ACCEPTANCE COFY ., pL~-._ASE REEURN .TO LAW E~G,Nr_ERI I Ii. .i,:¥ <,.5 I .~::~ LAW ENGINEERING I April 1, 1991 {Revised April 19, 1991) ! Board of' Commissioners, Cabar~Js County, North Carolina c/o HDR Engineering, Inc. I Suite 1400 128 South Tz~jon Street Charlotte, North C~olina 28202-5001 I Attention: Mr. Paul C. Watson, Jr., P. E. Sub~ect: Revised Proposal for Constx-uction Testing I and Services Inspection Coddle Creek Dam Cabarrus County, North Carolina I LAW Proposal No. Gentlemen: I As requested, Law Engineering is pleased to submit this revised proposal to provide testing and inspection services during the construction of the Coddle Creek D~m and ~ssociate~ relocation of N.C. State Highway No. 73. ~his i prnpossl presents our understanding of the proposed construction, the of services we would expect to provide, a cost estimate and a ~it fee schedule that will apply. This revised pDopossl includes an Addendum tn our Terms end I Conditious as discussed on April 19, 1991. i PROJ F.,~T INFORMATION The Coddle Creek Dam site is located approximately 700 ft north of where N.C. Highway 7~ crosses Coddle Creek in western Cabarrus County. North I Carolina. The proposed dam will be an earth embankment about 2200 ft long with a crest elevation of 660 feet. Minimum pool elevation of the proposed water supply reservoir will be 645 ft with 5 foot gates to raise the level to I 650 feet. The dam will be approximately 47 ft high above the do~mstream toe. It ~s understood that the dam size classification is large and the hazard classification is high (Class C). A 500-ft wide emergency spillway is planned a~ound the east embankment on the east abutment. The control elevation of the I emergency spillway will be 655 feet. A ~8-inch reinforced concrete pressure pipe will extend from the intake structure through the dam to the energy dissipator structure. The east abutment of the dam will cross Rankin Read I (S.R. 1619) and the reservoir will flood the road for approxL~atmly one mile north of N.C. Highway 7~. an 0.8 mile section of N.C. Highway 7~ will be relocated to the south to h/ghat ground. The primary s6~1 borrow a~ea will be I the excavation for the emergency spillway. A second borrow source will be an approx/mately 50-acre area at the intersection o£ Nenkin and Macedonia Church Hoads which is approximately 2/~ mile north of the dam site.