NextDecade Corp. said in a regulatory filing on Thursday that it has amended its agreements with Bechtel Energy Inc. to lock in the prices of its engineering, procurement and construction (EPC) contracts until June 15 for the proposed Rio Grande LNG export terminal in South Texas.

The company extended the agreement after missing a deadline Wednesday to issue Bechtel a notice to proceed (NTP) with construction. NextDecade also said in a filing with the U.S. Securities and Exchange Commission that it is now targeting a final investment decision (FID) for the first three trains by the end of June. 

The timeline has slipped slightly from a previous target of an FID in 1Q2023. The company has worked to secure the remaining offtakers to buy liquefied natural gas from the facility and...