07/10/2026
A very challanging crossing of RWA's 1900 Era 36" Cast Iron Transmision Water Main Yale Campus Trumbull St area sewer seperation projectNew Haven CT for GNHWPCA. A tight intersection in the heart of New Haven plauged with utilites in heavy traffic with limited working hours. Resulted in no other option but to go trenchless. Working with Hemlock Directional Drilling of Torrington CT applying hand mined pie jacking of a steel sleeve. After sleeve was complete we installed 18" DIP storm drain. Sheeting install by vaccum excavation to not create vibration. SOE design by GZA/ Siefert Associates . A successful field change to the 17 Mill project