BTD Report 1926 Plate 06: Dorchester Tunnel Extension Construction at Freeport Street Step 2: Frame Option:Studio/No Matting: Black The key to Sanborn’s success

The key to Sanborn’s success was its staggering commitment to monitoring and mapping the rapid growth of America’s cities and towns

ID: 2024030616

along Cambridge Street

Mississippi River Meander Belt: Cape Girardeau

BTD Report 1926 Plate 06: Dorchester Tunnel Extension Construction at Freeport Street Step 2: Frame Option:Studio/No Matting: Black The key to Sanborn’s successSubject: Dorchester Tunnel Extension (Now MBTA Red Line Ashmont Branch) Publisher: Boston Transportation Department Type(s): Photograph Size: 9" wide x 5. 75" high ID: 2025020406 Collection: WardMaps LLC Atlas: Boston Transportation Department Annual Report 1926