Project US Bank Stadium Owner State of Minnesota General Contractor Mortenson Precast Concrete Wells Concrete Fly Ash Boswell Unit 3 Year 2014 2016 Wells Concrete, the precast concrete supplier for US Bank Stadium chose to use class C fly ash from Boswell Energy Center to produce high-performance concrete (10,000 psi) for every one of the precast concrete elements used in this project. Fly-Ash Bricks and Blocks are largely used in various constructions, such as load bearing and pillar structure Buildings, Boundary walls, Roads, Culverts, Pavements, and wherever conventional bricks can be used. The general Fly ash bricks fall in the strength zone of 60-250 Kg/Cm2, thus is much stronger then conventional Bricks. These bricks gain Fly ash bricks are manufactured by mixing water, quarry dust/river sand, cement, fly ash and stone aggregates less than 6mm, normally the actual cement volume will be replaced with 10% to 20% fly ash. They are considered good and inexpensive building materials including Class C, fly ash