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Environmental findings shift Grand Opera House renovation east/west; council told a larger, donor‑backed project is now likely
Summary
Ramboll environmental work found historical contamination under the Grand Opera House site; staff recommended a lateral expansion rather than deep basement work to avoid costly remediation, increasing estimated project scope and pushing staff to seek donor commitments and phased design work for 2026–27.
City staff told the council that environmental review has changed the scope and cost estimate for a planned Grand Opera House renovation and expansion.
City Manager Roloff and facilities staff said Ramboll’s environmental review and DNR records indicate long‑standing contamination near the Grama’s footprint from a former dry‑cleaning operation. Because of that history, staff recommended minimizing deep excavation beneath the theater and pursuing a lateral expansion to the west to reduce the risk of expensive soil remediation. Roloff said environmental data on the DNR website made the team “recommend that going into the basement would be any any way a good move for this renovation.”
Mike Blank and project staff described a revised project budget that could approach $10 million in construction costs; the Grand Opera House Foundation has committed to lead fundraising for roughly half of the additional target but must raise pledges over several years. Staff estimated approximately $200,000 of additional design and environmental study work in 2025 to finish pre‑bid documents, with the bulk of construction now likely in 2026–27 if fundraising and design proceed.
Council members asked about contingency for further unknowns beneath downtown soils and the risk that PFAS or other remediation costs could grow; staff emphasized the lateral strategy reduces but does not eliminate subsurface work tied to utilities and limited excavations for a parking slab. The council did not vote but directed staff to proceed with limited additional design and environmental study and to update a memorandum of understanding with the Grand Foundation as fundraising progress dictates.
