Phillip Small and Alvin Cohen (the supervisor in mail order house and the collection manager in a finance company) saw a large, flat egg-shaped object, flying low about 100-150 feet above the bridge. It affected their car's electrical system and caused a burning sensation. It then rose vertically and disappeared in 5-10 seconds.

Ruppelt quotes the Blue Book reportt:

On 31 October 1958, this Center received a TWX reporting an UFO near Lock Raven Dam. A request for a detailed investigation was sent to the nearest Air Force Base. The following is a summary of the incident and subsequent investigation:

Two civilians were driving around near Lock Raven Dam on the evening of 26 October 1958. When they rounded a curve about 200 to 300 yards from a bridge they saw what appeared to be a large, flat, egg shaped object hovering about 100 to 150 feet above the bridge superstructure. They slowed their car and when they got to within 75 or 80 feet of the bridge their engine quit and their lights went out. The driver immediately stepped on the brakes and stopped the car. Attempts were made to start the car and when this was unsuccessful they became frightened and got out of the car. They put the car between them and the object and watched for approximately 30 to 45 seconds. The object then seemed to flash a brilliant white light and both men felt heat on their faces. Then there was heard a loud noise and the object began rising vertically. The object became very bright while rising and its shape could not be seen as it rose. It disappeared in five to ten seconds.

After the object disappeared, the car was started and they turned it around and drove to where a phone was located and contacted the Towson Police Department. Two patrolmen were sent to meet them. The two men told the patrolmen of their experience. The witnesses then noticed a burning sensation on their faces and became concerned about possible radiation burns. They went to a Baltimore Hospital for an examination. Both witnesses were advised by the doctor that they had no reason for concern.

"An extensive investigation was made concerning this incident. However, no valid conclusion could be made as to the possible nature of the sighting and it remains unidentified.

Shortly after you pass the dam . . . the bridge looms up in front of you at 200 to 250 yards away. . . . We saw from that distance what appeared to be a large, fat sort of egg-shaped object hanging between 100 to 150 feet off the top of the superstructure of the bridge over the lake.

We slowed and then decided to go closer and investigate the object. . . . When we got to within 80 feet of the bridge, the car went completely dead on us. It seemed as though the electrical system was affected: the dash lights went out, the headlights went out, the motor went dead. Mr. S., who was driving the car, put on his brakes, turned the ignition once or twice. We didn't get any whirring sound; we were pretty frightened at this point. . . .

…Then we decided to put the car between ourselves and the object. It was a very narrow road: on one side was the lake and on the other, a cliff. There was no place to run. We probably would have if we could, but we were terrified at what we saw.

We watched it... for approximately 30 to 45 seconds and then, I am not sure of the sequence of events here, it seemed to flash a brilliant flash of white light, and we both felt heat on our faces. Concurrently there was a loud noise, which I interpreted as a dull explosion. . . . Then very quickly . . . the object started to rise vertically. It didn't change its position, as far as we could tell, during the rising. The only different feature it had while it was moving was that it was very bright and the edges became diffused so that we couldn't make out the shape as it rose. It took from 5 to 10 seconds to disappear from view completely. We were very frightened. . . . We got back to a phone booth in approximately 15 minutes. We proceeded to call the Ground Observer Corps, with no result. Our story elicited only complete disbelief.

Google map of this location.