Minneapolis FRB

As some may recall, we have noted that the Federal Reserve branch banks across the US have been using a common set of UHF frequencies for their communications, but in all different modes. Some are analog, others are analog with DCS squelch tones and some are P-25 digital. But now
I received a report from a listener in the Twin Cites that indicates the Federal Reserve Branch Bank in Minneapolis is using a UHF LTR trunked system.

According to the supplied information, the trunked system is as follows:
406.6625 - LCN 10
410.4875 - LCN 01

I've learned long ago not to underestimate the possibilities of what can show up in the federal bands, but this is indeed unusual! Until I make it back up to Minneapolis, can anyone supply any further information on this system?