Construction Economics for March 17, 2025

ENR’s 20-city average cost indexes, wages and materials prices. Historical data and details for ENR’s 20 cities can be found at ENR.com/economics

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Best Specialty Construction: Minnesota Zoo Treetop Trail

The Minnesota Zoo’s overhead monorail was decommissioned in 2013, but the rails installed in 1979 remained as a relic of a bygone era of overhead transportation—until BARR Engineering and Snow Kreilich Architects reimagined the route as the Treetop Trail.

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Best K-12 Education: Bard High School Early College

Building over a D.C. Metro tunnel challenged the Bard High School Early College project team, who transformed a former elementary school into an institution dedicated to increasing higher education access for low-income and underrepresented communities by providing a free college program.

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