Gertens Greenhouse Commodity Storage Location: Eagan, Minnesota Contractor: Wieser Concrete Size: 1,125′ of 8’6″ L & T Panels Purpose: To provide commodity storage for Gertens Greenhouse aggregate. About this Project Wieser Concrete produced 1,125′ of precast L & T panels for Gertens Greenhouse in Eagan, Minnesota. The commodity storage contains 26 bays at 25′ deep.