Mortenson | Alberici | L. Keeley Joint Venture Selected for PreConstruction of the New St. Louis Major League Soccer Stadium Locally-based team with national sports expertise committed to inclusive workforce participation ST. LOUIS – (December 17, 2019) – Mortenson | Alberici | L. Keeley, has been selected to facilitate the planning of St. Louis’ new Major League Soccer stadium. The team is fully engaged in pre-construction efforts to finalize plans for the proposed stadium l