Houston-based Cheniere Energy said Thursday that it expects to begin exporting liquefied natural gas from its Sabine Pass liquefaction terminal in Cameron Parish in late February or March.

The first cargo was expected to occur by late January.

Construction for its first LNG unit was completed ahead of schedule and within budget, said Neal Shear, Cheniere’s interim president and CEO. However, instrumentation issues cropped up during the final phases of plant commissioning that require additional work.

The Sabine Pass LNG terminal has existing infrastructure of five LNG storage tanks with capacity of about 16.9 billion cubic feet equivalent of natural gas.

Over time, Cheniere plans to build up to six liquefaction units, which are currently in various stages of development.

Despite the delay, the Sabine Pass facility is slated to be the first in the lower 48 states to ship LNG overseas.