Landsvirkjun hereby invites tenders for engineering consultancy services for the re-evaluation of the project planning design for the Holtavirkjun hydropower plant in the lower Þjórsá river in Iceland. The Services include review of an outdated design (draft AACE stage 2), finalisation of required design revisions to issue a preliminary design (AACE stage 3), and preparation of information required to finalise the environmental impact assessment (EIA) for the project.