Let's go to the DOE thing first.
The article says
Grain Belt Express is also making procedural headway at the Federal Energy Regulatory Commission.
We've known for quite a while that GBE was going to connect to MISO and AECI in Callaway County at the existing McCreedie subtation and also at a new substation it is sharing with Ranger Power's immense solar farm. The new substation is called Burns. Burns will be owned and built by incumbent utility Ameren (however I hear that Ranger Power bought the land and scraped all the topsoil off it before handing it over to Ameren). Ameren has been ordered to build this substation and connect both Ranger Power and GBE by regional grid operator MISO. Ameren cannot refuse to build it. In addition, MISO's studies determined that there needs to be two new 345kV high-voltage transmission lines from the new Burns substation to the existing Montgomery substation (in Montgomery Co.) in order for GBE to connect. The existing line cannot carry enough power and new ones must be built. Ameren has also been ordered to build these new transmission lines, although GBE must pay for them.
GBE's interconnection to MISO was subject to a Transmission Connection Agreement between the parties. The TCA is a pretty standard thing that relies in large part on MISO's filed tariff with FERC. TCAs can be negotiated somewhat and once they are complete, they are filed with FERC for approval. Except GBE could not agree with MISO on a number of issues so MISO filed the TCA with FERC unexecuted (unsigned). FERC approved that unsigned TCA. GBE had asked FERC to make several changes to the TCA and force MISO to do certain things, and for FERC to make Ameren hurry up and build the new transmission lines that GBE needs to make its connection at Burns. FERC declined to make any of GBE's suggested changes and told GBE it was not necessary to tell Ameren to hurry up. GBE got NOTHING it asked for here. GBE was legally smacked upside the head. FERC has sided with its regional transmission organization, MISO, on all issues. This really isn't novel or different. FERC always sides with its pet RTOs. GBE is just stupid if it thinks it can challenge MISO and get a different result. Maybe now Polsky will get a clue about why they "don't hear from them" on all the complaints Invenergy has filed against MISO?
Although the TCA was approved by FERC, it doesn't do anything to make GBE's connection happen faster. It's still scheduled for, maybe, 2030. GBE had asked FERC to force MISO to connect some smaller portion of capacity in 2027. Not happening.
Why is this such an issue for GBE? Here's a quote from the Order:
Grain Belt asserts that, with respect to the reasons for delaying the In-Service Date of the GBX Line, Ameren Missouri did not mention that its affiliate, Ameren Transmission Company of Illinois, was awarded a number of transmission facilities under MISO’s Long-Range Transmission Planning process, which it is constructing with planned In-Service Dates of 2028 and 2030.
The Ameren lines will be cheaper. Therefore, GBE is in a big hurry to try to get its bloated behemoth online before Ameren gets those lines built. Looks like that's not going to be possible.
GBE is stripped bare... it's too expensive and obsolete. Who would want to be a customer? And, speaking of customers, GBE still does not have negotiated rate authority to try to find any. No matter though... GBE can't connect its project until at least 2030, when there will be better options for renewable energy transmission service in MISO.