Mine Maps, Sugar Grove, VA Speedometer Map , AL_MP000048, from New Jersey Zinc Company Historic Maps; topic area is 'Mine Maps'. The location is Sugar Grove, VA (estimated). The image was scanned from a paper file as part of the USGS NGGDPP deliverable for 2018-2019. The author is Bertha Mineral Company. The paper file was dated 10660. Physical Storage: Room 2, Austinville Limestone Company, Newtown Church Road, Austinville, VA 24312. Digital Storage: \\NG00250050\DGMR\Collections\NEW_JERSEY_ZINC\MineMaps\AL_MP000048.pdf. Additional information: