GermanyRainwater retention basin worksOpen Reconstruction of the rain-retention basin at the Saxon competence centre in Köllitsch Staatsbetrieb Sächsisches Immobilien- und Baumanagement, Zentrale, Zentralstelle Vergabe- und Vertragsmanagement Submission deadline November 20, 2026 at 8:00 AM UTC Contract value Not stated in the notice