Hallen has particular expertise in performing work in densely populated urban environments, a task which presents many challenges. We have been working with the major utilities that distribute natural gas and steam in the New York Metropolitan area for many years. The core of the utility work includes expansion of the networks, as well as the maintenance, repair, and upgrade of existing infrastructure. The work includes construction of steel and plastic mains and services carrying pressures from 1/4 psi to 1400 psi installed in an open trench, complete with paving restoration, as well as keyhole work utilizing our vacuum excavation equipment. We install governor regulators, multiple utilities in a common trench, and concrete vaults, which may be pre-cast or field constructed. Our well trained personnel and our very up-to-date fleet of equipment are available for emergency response 24/7.