The building, which was added to the National Register of Historic Places in 1974, was rejuvenated after being vacant for more than 40 years.
Thrasher was hired to assist in the renovation of the historic Burlington Railroad Station in downtown Omaha, Nebraska for KETV’s new broadcasting facility.
The renovation included an addition of interior mezzanine/floor space, thereby necessitating an increase in the load-carrying capacity of the existing foundation system. For several interior load-bearing walls, the existing foundation footings were temporarily underpinned with 20 resistance piers designed to act as “stilts” as the soil underlying the footing was excavated/removed to allow for the placement of additional concrete to strengthen and enhance the structural capacity of the existing foundation system. The new “enhanced” foundation system was ultimately supported by 24 drilled/pressure-grouted micropiles bearing on a deep bedrock stratum.
Thrasher installed a total of 72 piers at an average depth of 90 feet.
A new pedestrian bridge and a balcony were incorporated into the new design for the renovation, requiring 28 new-construction pressure-grouted micropiles, also bearing on the deep bedrock stratum.