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Glory of Another Time

Saving an old building is crucial for skylines and neighborhoods, retaining history, and adding character to our communities. EDM has provided engineering services for the preservation or adaptive reuse of numerous historic structures. We have the expertise in engineering design that protects, conserves and sustains these grand gems, so that future generations will realize their economic, social and environmental benefits, as well as the glory of another time.

Hadley Dean Building, St. Louis MO

Built in 1903, the 40,000 sf, 7-story former glass warehouse was designed by Isaac Taylor, architect for the St. Louis World’s Fair. The building is listed in the National Historic Register and EDM headquartered in this building until 1993.


The challenges solved included out-of-plumb walls and floors, below-code life safety system, rotting tongue-and-grove floors. Services included: mechanical, electrical,  plumbing and structural engineering.

Old Post Office, St. Louis MO

$47m renovation of HVAC and electrical systems that included new heating, air conditioning and air distributions systems, installation of two new 400-ton chillers, an 800-ton cooling tower, new building automation system, new lighting and electrical distribution and metering equipment.  


Services provided: Mechanical, Electrical, Plumbing and Structural engineering.

Union Station, St. Louis MO

Complete redevelopment of the turn-of-the-century headhouse into an urban retail mall and a 475-room hotel. 

Services provided: Mechanical, Electrical, Plumbing and Structural engineering.

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