The construction of new and the rehabilitation of existing infrastructure is based upon the final design and specifications established. Design specifications, bid requests, and contract language need to define environmental, social and health and safety management requirements as well as sustainability based actions. This approach can help eliminate or reduce construction impacts and improve environmental and social benefits. It can also help identify sustainable construction options for project design and construction contractors that can help reduce project costs, such as material selection, reuse, and recycling. Alternatively, it can provide project supervisors with input from construction contractors specific actions and criteria to assess environmental, social, health and safety, and sustainability. During the final closure or completion phase, the approach can assist in delivering the final work to the customer, handing over project documentation, terminating supplier contracts, releasing project resources, and communicating the closure of the project to all stakeholders. Even if sustainability criteria are not specified in the construction contract, it may be viable for the construction contractor to implement environmentally sustainable actions while meeting the bid and contract specifications, and thus provide potential cost savings and improved environmental and social benefits. During construction, ongoing dialogue with relevant actors, including local stakeholders, can help identify these opportunities.