Photo showing Potrooms 2c looking northeast, excavation on foreground for main air duct between clumn lines 6 and 7, forms for potroom footing on line M behind southeast corner of Service Building in left background, note vertical cut in compacted backfill.
Photo showing Potrooms 2c looking northeast, excavation on foreground for main air duct between clumn lines 6 and 7, forms for potroom footing on line M behind southeast corner of Service Building in left background, note vertical cut in compacted backfill.