Ann: Savage River Underground Prefeasibility Study Results, page-29

So far there has been no mention of Long Plains deposit which is close to the Savage River mine.
Long Plains contains 100 million tonnes on magnetite
RIO drilled it in the early 1960's.
Its had further intensive investigation over the years
2007 Exploration Program (Year 2)
In late 2006 a three stage program was devised to bring Long Plains from exploration potential to an indicated/measured resource suitable for detailed mine planning. The timeframe for the program could be up to 3 years or more depending on ABM’s production requirements into the future. Stage 1 was carried out during the 2007 field season and is a follow-up on the 2006 program. The main objective was to develop a reliable geological model. The work carried out included:  Compilation of the costean mapping  Track-cutting and completion of a ground magnetic survey  RC and diamond drilling All field work was completed by February 2007.

There has been little work done on Long Plains since Grange has been involved.
https://www.mrt.tas.gov.au/mrtdoc/tasxplor/download/08_5773/EL192005_200812_01_report.pdf