This contract is for professional airport engineering services between the Sanford Airport Authority and C&S Engineers, Inc. The contract is for a term of three years, with two one-year option periods, and includes various services such as engineering, technical management, and construction phase services. The contract has a number of provisions, including requirements for insurance, indemnification, and termination. The contract also includes provisions for subcontracting and the use of specialty consultants. The Sanford Airport Authority has the right to inspect the work of C&S Engineers, Inc. at any time, and the authority will have the right to approve or disapprove the consultant's work.