Plans and specifications for contract documents, materials and construction of public improvements shall generally adhere to the items in the Standard Specifications for Public Works Construction, latest revision as published by the North Central Texas Council of Governments (hereinafter referred to as NCTCOG Specs) or as specified and amended by the design engineer. Copies of the NCTCOG Specs may be purchased from the North Central Texas Council of Governments, 616 Six Flags Drive, Suite 200, (P.O. Box 5888), Arlington, Texas 76055-5888. NCTCOG can be contacted at 817-640-3300.