The purpose of this contract is to provide supervision services according to the relevant national legislation and fulfilling all duties of the 'Engineer' as specified in FIDIC Conditions of Contract for Construction ('Red Book' - First Edition, 1999) over the works which include construction of the bi-directional gas interconnector MG10 Niš – Dimitrovgrad on the Serbian territory, between the natural gas systems of Serbia and Bulgaria. The gas pipe is approximately 109 km long, DN700, and has working pressure of 55bar. The works also include four metering and regulating stations and accompanying facilities. The projected technical capacity of the new pipeline is approx. 1.8 bcm annually (‘bcm/a’).