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 track 3 Shortly after noticing the TOL, the dispatcher heard the Mayday radio transmission from the locomotive engineer of MBTA train 906 advising of an emergency at Back Bay station and to hold all trains. The dispatcher heard no conversation from the crew of Amtrak train 66 and was unable to contact them on the radio.

At 8:24 a m., from the Back Bay station platform, a passenger from MBTA train 906 telephoned the 911 operator for the Boston Emergency Medical Service (EMS). The first EMS units arrived at 8:28 a.m. The EMS personnel and both traincrews began evacuating the injured passengers and injured crewmembers. After the accident, the conductor of MBTA train 906 described the evacuation as orderly. The EMS transported 278 people with injuries to local hospitals. Among the 14 admitted were the locomotive engineer and apprentice engineer from Amtrak train 66 and 7 firefighters. No fatalities occurred as a result of the accident.

Both trains sustained massive equipment damage. The fuel tank on Amtrak locomotive 366 broke loose, and a diesel fuel fire ensued. The fire department quickly extinguished the fire, but moderately heavy smoke and minor fire damage resulted Exhaust fans in the tunnel reduced the smoke and removed it completely after the fire was extinguished.

Injuries
* After the accident, an additional 175 passangers reported injuries.

Damages
On Amtrak train 66, the two-unit locomotive and five cars were destroyed, and one car was significantly damaged. On MBTA train 906, the locomotive and one car were destroyed.

Tunnel structure damage required the replacement of two concrete support columns, six bridge girders, and bridge decking, the resurfacing of Dartmouth Street; and repairs to the support column wall and utilities. Signal cable damage was minor.

Amtrak and the MBTA estimated the damages as follows: