Dam project entails a large scale civil works and is liable to incur a significant environmental effects. This paper briefs the results of a preliminary life cycle assessment of a rockfill dam in terms of CO2 exhaustion. Site conditions such as topography, geology and hydrology govern the design and work volume of a dam. The input requisite to dam construction such as materials and energy, therefore, varies from site to site. Subsequently breakdown of work items, excavation for example into ripping, hauling and others, and estimation of CO2 exhaustion volume thereby are necessary as well as to apply a standard CO2 yield derived from the input/output analysis in the LCA of a dam. This assessment identified that the exhaustion by diversion works, excavation works, embankment works and spillway tallies 43, 000 ton or 84% of total exhausted CO2 of 54, 000 ton from a rockfill dam with an embankment volume of 3, 500, 000 m3.
