Conestoga-Rovers & Associates (CRA), of Canandaigua, NY, recently installed six new precast concrete manholes at an existing shopping center in Allen Park, MI. Due to the deep grade that the manholes ...

For shear size and complexity, this was by far the biggest and most interesting trench shielding job I have ever been a part of, and I've been working with trench shield systems for over 25 years," ...